’76-82 N Non-Reed (piston port) and
’83-87 P Pyramid Reed engines
Four engine versions are in this group:
1. N non-reed for sheet frame ’76-82 SL, SLE
black cylinder with ∅7 cylinder stud holes
1a. same but with silver cylinder ’76-82 TT
2. N non-reed for cradle frame ’76-82 C5, Laguna
black cylinder with ∅10 top holes for sleeve nuts
case has front studs for cradle frame
2e. same but with electric start option
3. P pyramid reed sheet frame ’83-86 SL, SLE, TT
black cylinder with ∅7 cylinder stud holes
3e. same but with electric start option
4. P pyramid reed for cradle frame ’83-87 RD50
black cylinder with ∅10 top holes for sleeve nuts
case has front studs for cradle frame
4e. same but with electric start option
Speed Versions
N and P 1976-86 had three speed versions:
30mph (2.0hp) 12mm intake, no restrictor,
one 1.5 mm variator limiting washer (gas mileage 117 mpg),
25mph (1.5hp) 10mm intake restrictor,
one 4 mm variator limiting washer (gas mileage 130 mpg),
20mph (1.0hp) 10mm intake restrictor,
two 4 mm variator limiting washers.
F 1985-89 had one speed version:
30mph (2.0hp) 10mm intake restrictor,
one 1.5 mm variator limiting washer,
43 mph actual when de-restricted!
Sources
DMCA is Derbi Motor Corporation of America, MMI is Marina Mobili Inc
1. 1977 Parts List Variant x DMCA
2. 1979 Parts List Variant x DMCA
3. 1980 Parts List C5 Diablo DMCA
4. 1982 Parts List Laguna x DMCA
5. 1984 Price List xxxxxxxx DMCA
6. 1989 Price List xxxxxxxx MMI
A1. Cylinder, Piston, Crank
# NNPP ’70’s # ’89 price list # price new or good-used .
1 1000 82.25.030 000.82.25.030 $150 N cylinder kit silver
1 1000 81.25.030 0A0.50.10.121 $150 N cylinder kit black
1 0100 00.00.000 0A0.50.30.121 $150 N cylinder kit black
1b 0010 00.00.000 0A1.25.00.031?$0.00 P cylinder kit black
1b 0001 00.00.000 0A0.50.40.121 none P cylinder kit black
2 1000 81.25.010 000.81.25.010 $45.0 N,P head bare ∅7 silver
2 1010 82.25.010 0F0.50.00.171 $45.0 N,P head bare ∅7 black
2 0101 00.00.000 0A0.25.00.011 $60.0 N,P head bare ∅10 black
3 1010 82.25.020 000.82.25.020 $8.00 N,P head gasket ∅7 holes
3 0101 00.00.000 0A0.25.00.021 $12.0 N,P head gasket ∅10 holes
4 2200 82.25.040 000.82.25.040 $3.00 N,N cylinder gasket 0.2mm
4b 0022 00.00.000 0A0.25.10.571 $3.00 P,P cylinder gasket 0.2mm
5 1100 82.25.570 000.82.25.570 $8.00 N,N cylinder spacer 2.0mm
5b 0011 00.00.000 0A0.25.00.041 $16.0 P,P cylinder spacer 2.0mm
6 1110 82.25.141 000.82.25.141 $130 N,N,P crank circle type note 1
6b 0001 00.00.000 0A0.25.00.141 none P crankshaft full circle RD50
7 4000 31.25.290 000.31.25.290 $1.20 N head nut M7 x 7 hex11
7b 0040 82.02.730 000.82.02.730 $4.00 P head nut M7 x 10 hex12
7c 0404 00.00.000 0A0.25.00.291 none N,P head nut M7 ∅10 x 70? sleeve
8 4040 31.25.280 000.31.25.280 $0.20 N,P head washer ∅7
8 0404 00.00.000 0C0.25.00.538 $0.30 N,P head washer ∅10
10 1111 80.25.090 000.80.25.090 none piston 37.94 x 12-17-20.5 orig
10 1111 80.25.090 000.80.25.090 $65.0 piston 37.94 x 12-17-20.5 note 2
11 1111 80.25.100 000.80.25.100 none piston bare original
12 1111 80.25.110 000.80.25.110 $10.0 upper ring 38 x 2 L-type
13 1111 67.25.110 000.67.25.110 $9.00 lower ring 38 x 1.5 GN
13 1111 00.00.000 0A0.25.00.118 $18.0 ring set 38 x 2 L and 38 x 1.5 GN
14 1111 31.25.120 000.31.25.120 $10.0 piston pin ∅12 x 30
15 2222 31.25.130 000.31.25.130 $1.50 piston clip ∅12
16 1111 21.25.170 000.21.25.170 $9.00 piston bearing 12-15 x 15
18 1111 31.25.180 000.31.25.180 $10.0 rod bearing 16-22 x 12
19 1111 03.25.190 000.03.25.190 none crank pin
21 1111 00.57.203 005.71.20.300 $16.0 L crank bearing 6203-C3
22 1111 00.57.303 000.00.57.303 $10.0 R crank bearing 6303
23 2222 61.25.230 000.61.25.230 $8.00 L & R crank seal
24 1111 82.31.010 000.82.31.010 $40.0 decomp assy
25 1111 04.73.040 000.04.73.040 $2.50 decomp E-clip 4mm
26 1111 82.31.050 000.82.31.050 $5.00 decomp lever
27 1111 82.31.110 000.82.31.110 $6.00 decomp bracket
28 1111 82.31.120 000.82.31.120 $7.00 decomp roll pin ∅2.5 x 16
29 1111 00.04.510 000.00.04.510 $2.00 decomp screw M5 x 10 allen
30 1111 82.31.020 000.82.31.020 $20.0 decomp valve
31 1111 82.31.090 000.82.31.090 $2.50 decomp o-ring 2.0 x 4 (8 od)
32 2222 82.31.100 000.82.31.100 $5.00 decomp spring guide
33 1111 82.31.040 000.82.31.040 $9.00 decomp spring ∅10×20
34 2200 00.04.615 000.00.04.615 $0.70 N intake bolt M6 x 15 (16) allen
35 2200 00.34.060 000.00.34.060 $1.00 N intake washer M6 inner teeth
36 1100 82.25.050 000.82.25.050 $7.00 N intake gasket
37 1100 82.25.060 000.80.25.060 40–20 N intake pipe ∅18, ∅13-16 id
38 1100 50.25.580 000.50.25.580 $3.00 N intake reducer ∅12-10 (some)
Note 1. The price of a good used crankshaft depends mostly on how much wear is where the right bearing contacts the crank.
Note 2. The replacement piston is GOL 0037A-C with the skirt shortened from 23 to 20.5 mm. It has the same dimensions. Both rings are the normal type (rectangular cross-section).
A2. Case and Covers
# NNPP ’70’s # ’89 price list # price new or good-used .
1 1000 82.30.002 000.82.30.002 none N case set SL, SLE, TT
1 0100 79.30.630 0A0.30.00.631 none N case set C5, Laguna
1 0010 00.00.000 0A0.30.20.631 none P case set SL, SLE, TT
1 0001 00.00.000 0A0.30.30.631 none P case set RD50
2 1000 82.30.010 000.82.30.010 none N right case half
2 0222 31.30.020 000.31.30.020 $7.00 N,P centering pin ∅7 x 20
3 1000 82.30.031 000.82.30.040 none N left case half
3 0202 79.30.730 000.79.30.730 none N,P rubber plug note 1
4 3000 82.30.021 000.82.30.021 $9.00 N rubber tube ∅14-22 x 50
5 1000 82.30.030 000.82.30.030 $10.0 N case gasket
5 0100 79.30.030 000.79.30.030 $15.0 N case gasket
5 0011 00.00.000 0A0.30.10.031 none P,P case gasket for elec. start
5 0011 81.30.030 0A0.30.30.031 $15.0 P,P case gasket
6 3000 82.30.070 000.82.30.070 $9.00 N steel tube ∅9-14 x 48
7 4040 31.30.050 000.31.30.050 $4.50 N cylinder stud M7 x 117
7 0404 79.30.050 000.79.30.050 none N cylinder stud M7 x 50?
8 1111 31.30.080 000.31.30.080 $6.00 filler plug M14-1.25 with vent
9 1100 56.30.120 000.56.30.120 $3.00 drain plug gasket ∅14-20
9 0011 00.00.000 0A0.30.00.121 $0.00 drain plug gasket
# NNPP ’70’s # ’89 price list # price new or good-used .
10 1000 82.30.150 000.82.30.150 none R grey ’76-82 Derbi SL
10 1111 85.30.150 000.85.30.150 $70.0 R black ’76-86 TT
10 1111 85.30.150 000.85.30.150 $00.0 and ’83-86 SL SLE
10 1111 85.30.150 000.85.30.150 $70.0 R black ’76-86 TT
10 1111 85.30.150 000.85.30.150 $00.0 and ’83-86 SL SLE
10 1000 87.30.150 000.87.30.150 none R gold ’76-82 Derbi SLE
11 1000 82.30.200 000.82.30.200 none L grey ’76-82 Derbi SL
11 1000 82.30.200 000.85.30.200 $55.0 L black ’76-82 Derbi TT
11 1000 82.30.200 000.85.30.200 $00.0 with the hole fits ’83-86
11 1000 82.30.200 000.87.30.200 $70.0 L gold ’76-82 Derbi SLE
11 0101 80.30.201 000.80.30.201 none L black metal
11 0101 80.30.201 000.80.30.201 none ’76-87 C5, RD50, Laguna
11 0010 00.00.000 0A0.30.20.201 $30.0 L black damaged
11 0010 00.00.000 0A0.30.20.201 $00.0 ’83-86 SL, SLE, TT
11 0010 00.00.000 0A0.30.20.201 $10.0 L black badly damaged
11 0010 00.00.000 0A0.30.20.201 $00.0 ’83-86 SL, SLE, TT
# NNPP ’70’s # ’89 price list # price Cover Screws .
13 2000 00.04.655 000.00.04.655 $1.20 M6 x 55 allen R top2
13 2222 82.30.110 000.82.30.110 $0.80 M6 x 55 slot R top2
16 5000 00.04.635 000.00.04.635 $0.80 M6 x 35 allen L all3, R bot2
16 5555 31.30.110 000.31.30.110 $1.00 M6 x 35 slot L all3, R bot2
# NNPP ’70’s # ’89 price list # price Case Screws .
13 1000 00.04.655 000.00.04.655 $1.20 M6 x 55 allen
13 1333 82.30.110 000.82.30.110 $0.80 M6 x 55 slot
14 5000 00.04.650 000.00.04.650 $1.00 M6 x 50 allen
14 5333 31.30.090 000.31.30.090 1 -.70 M6 x 50 slot
15 1000 00.04.645 000.00.04.645 $1.00 M6 x 45 allen
15 1222 31.30.190 000.31.30.190 1 -.80 M6 x 45 slot
16 8000 00.04.635 000.00.04.635 $0.80 M6 x 35 allen
16 8777 31.30.110 000.31.30.110 $1.00 M6 x 35 slot
# NNPP ’70’s # ’89 price list # price new or good-used .
12 6000 31.25.260 000.31.25.260 $10.0 N rub-steel tube ∅8.7-19 x 17
17 1100 56.30.130 000.56.30.130 $12.0 NP drain plug M14-1.25 metal
17 0011 00.00.000 0A0.30.00.421 $0.00 NP drain plug
18 1111 00.04.615 000.00.04.615 $0.70 check plug M6 x 16 allen
19 1111 31.02.280 000.31.02.280 $1.50 check plug gasket ∅6
20 1000 82.33.280 000.82.33.280 $7.00 N wires grommet
20 0111 79.33.280 000.79.33.280 $0.00 NPP wires grommet
21 0202 25.30.680 000.25.30.680 $0.00 NP mount stud
28 0011 00.00.000 0A0.25.00.711 none PP intake pipe
27 0022 20.25.050 000.20.25.050 $8.00 PP intake gasket
29 0044 00.04.620 000.00.04.620 $0.70 PP intake bolt M6 x 20
30 0044 00.34.060 000.00.34.030 $0.70 PP intake washer ∅6 inner teeth
31 0033 00.00.000 000.40.30.600 none PP reed petal screw M3 x 6
32 0033 00.34.030 000.00.34.030 none PP reed petal washer ∅3 star
33 0033 20.25.630 000.20.25.630 none PP reed petal stop
34 0033 20.25.650 000.20.25.650 $7.00 PP reed petal
35 0011 00.00.000 0D0.25.10.641 $80.0 PP reed valve assy 3-petal
36 1111 50.25.580 000.50.25.580 $3.00 intake reducer ∅12-10 (some)
Note 1. On the cradle frame engine versions N, P, the two #3 rubber plugs go in the unused front-top motor mount holes.
Note 2. The screw quantities must add up correctly. The number of case bolts that pass through the gasket must be 13, the same as the number of case gasket case bolt holes.
55 50 45 35 mm M6 Engine Bolts
13 14 15 16 No-reed engine for sheet frame
00 00 00 03 N left cover
02 00 00 02 NNPP right cover
01 05 01 06 N case total 1+5+1+6 = 13
00 00 00 02 N bolts unaccounted for
—————————–
03 05 01 13 N totals (22) from catalog
13 14 15 16 Pyramid reed for sheet frame
00 00 00 03 P left cover
02 00 00 02 NNPP right cover
01 05 01 06 P case total 1+5+1+6 = 13
00 00 00 02 P bolts unaccounted for
—————————–
03 05 01 13 P totals (22) from catalog
13 14 15 16 No-reed engine for cradle frame
02 00 00 01 NP left cover metal
02 00 00 02 NNPP right cover
00 03 02 08 N case total 0+3+2+8 = 13
01 00 00 01 N bolts unaccounted for
—————————–
05 03 02 12 N totals (22) from catalog
13 14 15 16 Pyramid reed for cradle frame
02 00 00 01 NP left cover metal
02 00 00 02 NNPP right cover
00 03 02 08 P case total 0+3+2+8 = 13
01 00 00 01 P bolts unaccounted for
—————————–
05 03 02 12 P totals (22) from catalog
Note 3. The early non-reed engine version with two pedal chains has different engine covers and engine bolts.
55 50 45 35 mm
13 14 15 16 Non reed for sheet frame
00 00 00 03 N early left cover
04 00 00 00 N early right cover
03 02 02 06 N case total 3+2+2+6 = 13
00 00 00 02 N bolts unaccounted for
—————————–
07 02 02 11 N totals (22) from catalog
A3. Variator Clutch
# qty ’70’s # ’89 price list # price new or good-used .
1 1 82.26.820 000.82.26.820 $180 clutch assy new note 1
1 1 82.26.820 000.82.26.820 $120 clutch assy good-used
2 1 82.26.170 000.00.00.000 none start drum bare note 2
2a 1 82.26.160 000.00.00.000 $60.0 clutch shoe set
3 3 82.26.440 000.82.26.440 $6-$4 cushion tube ∅4-10.5 x 5
4 3 82.26.810 0M0.26.00.811 $7.00 clutch spring
5 3 82.26.410 000.82.26.410 $4.00 clutch washer ∅7-12 x 1
6 3 00.47.308 000.00.47.308 $2.00 E-clip for ∅6 groove
7 1 82.26.150 000.82.26.150 $70.0 start shoe pair
8 2 82.26.070 000.82.26.070 $5.00 start cushion
9 2 82.26.770 000.82.26.770 $6.00 start spring
10 2 82.26.330 000.82.26.330 $7.00 start washer ∅7-12 x 2.5
11 1 82.26.460 000.82.26.460 $65.0 outer pulley plate
12 3 82.36.110 000.82.36.110 $13.0 weight with 2 end caps
13 6 82.26.420 000.82.26.420 $6-$3 weight end cap
14 3 82.26.760 000.82.36.110 $2.00 weight bare
15 1 82.26.190 000.82.26.190 $45.0 weight cover with fan
16 1 00.57.201 000.00.57.201 $7.00 clutch bearing 6201Z 12-32 x 10
17 1 00.47.232 000.00.47.232 $3.00 internal ret. ring ∅32
18 3 82.36.090 000.82.36.090 $7.00 weight cover guide
19 1 82.26.241 000.82.26.241 $9-$6 variator washer ∅28-44 x 0.5
20 1 82.26.261 000.82.26.261 $3.00 var. cap nut M28-1.0 x 13 hex35
20 1 82.26.261 000.82.26.261 $12-8 var. thin nut M28-1.0 x 5 hex35
21 1 82.26.380 000.82.26.040 $4-$2 cover plug
22 1 82.26.730 000.82.26.730 $12.0 step spacer ∅12.2-18-21.5 x 14.6
23 1 82.26.720 000.82.26.720 $18.0 needle bearing ∅16-22 x 12
24 1 82.26.480 000.82.26.480 $16.0 bearing race tube ∅10-16 x 15
25 1 65.25.530 000.65.25.530 $3-$1 clutch washer ∅10 x 20
26 1 31.13.150 000.31.13.150 $8.00 clutch nut M10-1.0 x 6 hex14
27 1 82.26.370 000.82.26.370 28-10 belt original 17.5 x 830
27 1 82.26.370 000.82.26.370 $18.0 belt generic 18 x 828
28 1 80.26.120 000.80.26.120 40-25 rear pulley inner
29 1 82.26.130 000.82.26.130 25–16 variator guide-cam
30 1 82.26.210 000.82.26.210 $15.0 variator spring
31 1 82.26.020 000.82.26.020 $6.00 splined washer
32 1 80.36.160 000.80.36.160 40-25 rear pulley outer
33 1 82.26.232 000.82.26.232 $3.00 rear pulley tab washer ∅14
34 1 80.26.510 000.80.26.510 $8.00 rear pulley nut M14-1.5 x 5 hex19
35 1 82.26.740 000.82.26.740 50-30 drive pulley assy no start shoes
36 1 82.26.040 000.82.26.040 $120 drive pulley w/start shoes
37 1 50.36.191 000.50.36.191 $5.00 limiting washer ∅30-40 x 4.0
37 1 50.36.190 000.50.36.190 $5.00 lim. washer ∅30-40 x 1.5 note 3
Note 1. The #1 clutch assy includes #2, 2a, and 3 of #3, 4, 5, 6. The long name is “start clutch drum with run clutch shoe set”.
Note 2. The #2 start clutch drum is scarce because it gets damaged from completely worn out start shoes.
Note 3. 30mph (2.0hp) had one 1.5 mm limiting washer.
25mph (1.5hp) had one 4 mm variator limiting washer.
20mph (1.0hp) had two 4 mm variator limiting washers.
A4. Transmission
The T two-pedal-chain transmission is from the 1977 parts catalog (in Spanish) with 32 items listed. This early parts catalog is stamped Derbi Motor Corporation of America. It must have been the first parts catalog. The Variant model is about 85% the same as a US model. The transmission, trim and electrical equipment are the main differences.
Notice that none of the T-only parts have 1989 price list part numbers. That means that Derbi USA did not carry T-only parts. It’s unlikely that they once had all of them but sold all of them. The first few US-model bikes may have had the two-pedal-chain transmission.
The O one-pedal-chain transmission is from the 1979 USA parts catalog (in English) with 27 items. This was on most, if not all, US models.
# TO ’70’s # 0 ’89 price list # price T is Two-chain, O is One-chain
1 22 00.471.15 000.00.47.115 $1.50 external clip ring 15
2 11 82.28.372 000.82.28.372 $15.0 sprocket 19 tooth SL, SLE, TT
2 11 82.28.373 000.82.28.373 $00.0 sprocket 20 tooth C5, Laguna
3 11 82.28.400 000.82.28.400 $7.00 left drive seal 15-30-7
4 11 00.57.302 000.00.57.302 $10.0 L drive bearing 6302
5 10 82.35.440 000.00.00.000 none T retaining cup washer
6 10 82.35.430 000.00.00.000 none T pinion securing piece
7 10 82.35.421 000.00.00.000 none T left pedal pinion 10T
8 10 82.35.411 000.00.00.000 none T right pedal pinion 15T
8 01 50.35.410 000.50.35.410 $15.0 O pedal pinion 15T
9 30 82.35.271 000.00.00.000 none T pinion stop pin
10 10 82.28.641 000.00.00.000 none T gear shifter
10 01 50.28.640 000.50.28.640 $19.0 O shifter dog
11 10 82.28.220 000.00.00.000 none T gear wheel 52T
11 01 82.28.221 000.82.28.221 $80.0 O gear wheel 55T (list says 54)
12 11 82.28.560 000.82.28.560 $4.00 washer ∅16-25 x 1
13 20 82.28.450 000.00.00.000 none T needle bearing ∅16-20 x 16?
13 01 82.28.492 000.82.28.492 $15.0 O dual bearing ∅16-20 x 50
14 10 82.28.700 000.00.00.000 none T spacer tube ∅16-19 x 12?
14 0a 82.28.561 000.82.28.561 none O washer 16-25 x 0.45
14 0a 82.28.562 000.82.28.562 $5.00 O washer 16-25 x 0.60
14 0a 82.28.563 000.82.28.563 none O washer 16-25 x 0.70
14 0a 82.28.564 000.82.28.564 $5.00 O washer 16-25 x 0.80
15 11 82.28.280 000.82.28.280 $7.00 ring with lip 15.5-17.7-19.5 x 3
16 21 82.35.140 000.82.35.140 $20.0 pedal chain #35 37 links
17 11 82.28.300 000.00.00.000 $80.0 pulley shaft-gear 16T tapered
18 11 00.57.205 000.00.57.205 $17.0 R drive bearing 6205 25-52-15
19 11 82.30.460 000.82.30.461 $9.00 R drive seal 25-40-7
20 11 82.28.050 0A0.28.20.051 15-$9 shifter lever SL, SLE
20 01 85.28.050 000.00.00.000 $00.0 shifter lever TT
20 01 79.28.050 000.00.00.000 $18.0 shifter lever long note 1
21 11 82.28.060 000.82.28.060 $12.0 shifter shaft
22 11 82.28.360 000.82.28.360 $8.00 shifter seal 12-18-3
23 11 82.28.080 000.82.28.080 $5.00 shifter roll pin 3.5 x 18
24 11 82.28.090 000.82.28.090 $12.0 shifter fork
25 22 82.28.100 000.82.28.100 $7.00 shifter pawl
26 22 00.31.060 000.00.31.060 $0.20 washer M6
27 22 00.23.060 000.00.23.060 $0.90 nut M6 nylock
28 11 82.28.160 000.82.28.160 none N,N drive shaft bare
28 01 50.28.130 000.50.28.130 none O N,N drive shaft assy 15T note 2
28 01 00.00.000 0A0.28.00.131 none O P,P drive shaft assy 15T note 3
28 01 00.00.000 0A0.28.20.071 none O P,P drive shaft assy 10T longer
29 11 82.28.970 000.31.27.200 $6.00 shifter spring ∅4.5 x 17 11-coils
30 22 00.61.040 000.00.61.040 $0.20 shifter ball 3/16″ note 4
31 11 82.28.930 000.82.28.930 $18.0 shifter lever cover
41 11 82.35.030 000.82.35.030 22-15 left pedal crank
42 22 82.35.040 000.82.35.040 $2.00 wedge pin ∅9 with 2, 3
43 22 00.33.070 000.00.33.070 $0.50 lock washer ∅7
44 22 00.21.070 000.00.21.070 $0.60 nut M7
45 10 82.35.090 000.00.00.000 none T pedal shaft
45 01 82.35.092 000.82.35.093 $40.0 O N,P pedal shaft L=250
45 01 81.35.091 000.81.35.091 $60.0 O N,P pedal shaft L=280
46 11 82.28.560 000.82.28.560 none washer ∅16
47 11 82.35.390 000.82.35.390 $14.0 nut M19-1.0 x 6 hex 25
48 11 82.35.380 000.82.35.380 $5.00 washer ∅19 inner teeth
49 22 82.35.240 000.82.35.240 $5.00 washer ∅19-25 x 1.0
50 10 82.35.050 000.00.00.000 none T sprocket assy 29-34T
50 01 50.35.050 000.50.35.050 $25.0 O sprocket 29T note 5
51 11 82.35.260 000.82.35.260 $9.00 pedal driver
52 11 82.35.320 000.82.35.320 $8.00 friction spring
53 10 82.35.400 000.00.00.000 none T washer ∅16
53 02 82.28.310 000.82.28.310 $8.00 washer ∅16-32 x 3.0
54 11 82.28.960 000.82.28.962 $130 dual gear 22T x 62T note 6
55 20 82.28.490 000.00.00.000 none T needle bearing ∅16-20 x 14
55 01 82.28.492 000.82.28.492 $15.0 O dual needle bearing ∅16-20 x 30
56 10 82.28.260 000.00.00.000 none T spacer ∅16-20 x 2 note 7
56 10 82.28.700 000.00.00.000 none T washer
57 10 82.28.310 000.00.00.000 none T shim washer ∅16-32 x 2.0?
57 0a 82.28.990 000.82.28.565 none shim washer ∅16-32 x 2.0
57 0a 82.28.311 000.82.28.311 $8.00 shim washer ∅16-32 x 1.8
57 0a 82.28.312 000.82.28.312 none shim washer ∅16-32 x 1.6
58 11 82.35.130 000.82.35.130 $32.0 right pedal crank
59 11 82.35.121 000.82.35.121 none rt pedal blk M14-1.5 French
60 11 82.35.021 000.82.35.021 none lf pedal blk M14-1.5 French
61 11 82.35.070 000.82.35.070 none sprocket spacer ?
62 22 82.35.300 000.82.35.300 none pedal shaft seal 16-24-4
Note 1. The #20 longer shift (engage) lever is for models with the wider metal left cover; C5, Laguna, RD50 and SLE-E.
Note 2. The #28 drive shaft assembly includes #8, #10, #29, #30. The N type drive shaft for non-reed models has a 15 tooth pedal sprocket and two clip grooves for holding the the motor sprocket. The early P type for pyramid-reed models is the same but has M12-1.5 threads for holding the motor sprocket. The late P type for pyramid-reed models is the same but has a 10 tooth pedal sprocket.
Note 3. The sprocket shaft end on a ’83-86 pyramid reed engine sticks out more than on a ’76-82 non-reed engine. So the non-reed left cover with the dimple over the sprocket won’t fit unless the dimple is cut away leaving a hole. The reason it sticks out more is because the end has a short threaded post for a sprocket nut M12-1.5 thread, instead of a clip. It may also stick out more if Derbi moved the sprocket outward to make room for a possible wider rear tire.
Note 4. The #29 shifter spring and two #30 balls go in a hole through the #28 drive shaft, under the #10 shifter dog. Notches in the shifter dog keep it in either the in-gear or out-of-gear positions. Be careful, when the shifter dog is slid all the way out, the spring and balls shoot out and fly away forever.
Note 5. The #50 O pedal sprocket with 29 teeth says 82.35.050 which is the part number for the #50 T pedal dual sprocket assembly. So one of the two T sprockets has 29 teeth. The parts catalog says the two driven pedal sprockets have 10 and 15 teeth. Since the T and O versions have equal length pedal chains, the tooth sums of the sprocket pairs must be equal. 29 plus 15 must equal x plus 10, so x must be 34.
Note 6. The right gear set tooth total is 62 + 16 = 77. The left gear set tooth total is 55 + 22 = 77. The gear set tooth totals must be equal because the two gear sets each have the same two center lines.
Left is #28 drive shaft. Right is #17 pulley shaft. Top is #54 dual gear. It goes on the #45 pedal shaft, not shown. The right gear set reduces the rpm by 16/62. The left gear set further reduces the rpm by 22/55.
Note 7. The width of the dual gear is 30.5 mm. The two #55 14mm bearings and #56 2 mm spacer totals 30 mm, the same as the #55 dual bearing.
Derbi’s amazing two-pedal chain transmission (T) has two pedal ratios. When the shift lever is set to “pedal” the motor is disengaged and the ratio is high for pedaling. When the shift lever is set to “motor” the motor is engaged and the ratio is low for kick starting the engine. From the 1977 Derbi Variant Service Manual (in Spanish).
A5. Exhaust
# qty ’70’s # 0 ’89 price list # price new or good-used .
1 1 82.34.080 000.82.34.080 $0.00 exhaust assy
2 1 82.34.040 000.82.34.040 $10.0 exhaust gasket
3 1 82.34.120 000.82.34.120 $40.0 end cover-baffle
4 1 00.02.830 000.00.02.830 $0.60 mount bolt M8 x 30 hex
5 1 00.24.080 000.00.24.080 $0.80 mount nut M8
6 2 00.31.080 000.00.31.080 $1.00 mount washer ∅8 inner teeth
7 1 31.15.050 000.31.15.050 $8.00 mount rubber ∅8-16-21 x 18
8 2 00.04.620 000.00.04.620 $0.70 exhaust bolt M6 x 20 allen
9 1 00.31.060 000.00.31.060 $0.20 end washer M6
10 1 00.24.060 000.00.24.060 $0.90 end nut nylock
A6. Magneto
N. Motoplat 9600 099 ⇐ ♦♦♦ on N ’76-82 Variant SL, SLE, TT
a. Motoplat 9600 099 ⇐ ♦♦♦ on N ’78-82 C5 Diablo, Laguna
P. Motoplat 0602 007 ⇐ ♦♦♦ on P ’83-86 Variant SL, SLE
b. Motoplat 0602 007 ⇐ ♦♦♦ on P ’83-87 RD50
F. Motoplat 0602 062 ⇒ ♦♦♦ on F ’85-86 Variant SL-X, SLE-X
c. Motoplat 0602 062 ⇒ ♦♦♦ on F ’85-89 Variant Sport
N is no reed valve, P is pyramid reed valve, F is flat reed valve
# NPF ’70’s # ’89 price list # price new or good-used .
a 100 50.33.010 000.50.33.010 $200 magneto N 9600 099
b 010 00.00.000 0A0.33.00.011 none magneto P 0602 007
c 001 00.00.000 0F0.33.00.011 none magneto F 0602 062
0 100 00.00.000 0F0.33.10.161 $150 stator assy for N
0 011 00.00.000 0F0.33.10.161 none stator assy for P,F
1 100 31.33.021 000.00.00.000 $25.0 base plate ∅94, 4 x 47 N
1 011 00.00.000 000.00.00.000 none base plate ∅94, 4 x 46 P,F
1 110 31.33.021 000.00.00.000 $20.0 wire harness ♦♦♦ N,P
1 001 00.00.000 000.00.00.000 none wire harness ♦♦♦ F
2 111 31.33.030 000.31.33.030 $4.00 felt wiper
3 100 50.33.040 000.50.33.040 60-40 lights coil 4 x 47 red wire
3 011 00.00.000 0A0.33.30.041 none lights coil 4 x 46 yel. wire
4 222 50.33.050 000.50.33.050 $0.90 lights coil screw M4 x 25 phil
5 555 00.31.030 000.00.31.030 $0.50 washer ∅4 wave
6 111 31.33.060 000.31.33.060 $13.0 condenser M17
7 100 50.33.070 000.50.33.070 $70.0 ign. coil 4 x 47 blu, grn
7 011 00.00.000 0A0.33.30.071 none ign. coil 4 x 46 blu, grn
8 100 31.33.081 000.31.33.081 $22.0 points 080 N
8 011 00.00.000 000.43.33.080 $31.0 points 081 P,F
9 222 31.33.090 000.31.33.090 $0.90 ign. coil screw M4 x 20 phil
10 333 31.33.260 000.31.33.260 $2.00 stator screw M5 x 10 orig.
10 333 31.33.260 000.31.33.260 $0.60 stator screw M5 x 10 subst.
11 100 50.33.120 000.50.33.120 95–70 flywheel ⇐ 9600 099 N
11 010 00.00.000 0A0.33.10.121 none flywheel ⇐ 0602 007 P
11 001 00.00.000 0F0.33.10.121 none flywheel ⇒ 0602 062 F
12 110 31.33.240 000.31.33.240 $2.00 flywheel washer ∅10-19 x 2
12 001 00.00.000 0M0.26.00.651 $2.00 flywheel washer ∅10-19 x 1
13 110 31.33.221 000.31.33.231 12-$8 fly. nut M10-1 x 18 hex17 N,P
13 001 00.00.000 0F0.26.00.401 $12.0 fly. nut M10-1 LEFT x 8 h14 F
14 111 31.33.230 000.31.33.230 $2.00 flywheel key M82 2.5 x 3.7
15 111 82.33.170 000.88.33.171 $0.00 spark coil Motoplat
16 222 82.15.310 001.10.61.300 $1.50 sheet-metal screw
17 111 79.33.270 0D0.33.00.271 $6.00 spark cap substitute C5
18 111 52.33.210 000.52.33.210 $4.00 spark plug NGK B7HS
19 220 82.33.280 000.82.33.280 $5.00 wires grommet N,P
19 001 00.00.000 0F0.33.00.281 none wires grommet F
19 001 00.00.000 0F0.33.10.281 none wires grommet F
20 222 50.33.260 000.50.33.260 $1.50 points screw M5 x 10 orig.
20 222 50.33.260 000.50.33.260 $0.60 points screw M5 x 10 subst.
Note 1. These three magnetos have an external ignition ground powering the brake light. That means the brake light equipment and wires can cause no spark. When checking for spark always ground the blue wire. Connect it to the engine fins with an alligator clip. Here is more info.
A7. Optional Electric Start
# qty ’70’s # 0 ’89 price list # price new or good-used .
0 1 31.13.150 000.00.00.000 $8.00 flywheel nut M10-1.0 x 6 hex14
0 1 81.33.010 0A0.33.20.121 $120 flywheel 9600 099 with drum
0 1 81.35.091 000.81.35.091 $60.0 pedal shaft L=280 longer
0 1 82.39.370 CEV 04572.2 0 $33.0 switch key original
0 1 82.39.370 CEV 04572.2 0 $15.0 switch key substitute
0 1 82.39.500 CEV 04572 00 $59.0 switch with 2 subst. keys
0 1 87.33.400 000.87.33.400 none Ni-Cad battery pack
0 1 87.10.300 000.87.10.300 none wiring harness for e. start
0 1 87.39.010 000.87.39.010 none starter relay
0 1 82.39.520 0A0.10.00.481 none regulator/rectifier
A8. Carburetor
1. N,P ’76-87 Variant SL, SLE, TT, C5, RD50, Laguna
lever choke operated directly on C5, RD50, Laguna
or operated by center panel button on SL, SLE, TT
52 jet, 2-ended throttle cable with curved pipe
2. F ’85-89 Variant Sport, SLE-X
has a cable choke operated by a thumb lever
54 jet, 1-ended throttle cable
3. F ’87-89 DS50 scooter, low clearance top
has a cable choke operated by a thumb lever
54 jet, 1-ended throttle cable
N is no reed valve, P is pyramid reed valve, F is flat reed valve
# NPF ’70’s # 0 ’89 price list # price new or good-used .
NP 110 82.32.011 000.00.00.000 $90.0 carb. Arbeo SHA 12-12 note 1
F 001 00.00.000 0F0.32.00.011 none carb. Arbeo SHA 12-12C
F 001 00.00.000 0E0.32.30.011 none carb. Arbeo SHA 12-12D
1 110 31.32.340 Dellorto 6305 $2.00 clamp bolt
2 110 31.32.310 Dellorto 6140 $4.00 idle screw
3 110 31.32.100 Dellorto 3606 $2.00 idle screw spring
4 111 31.32.350 Dellorto 6448 $7.00 clamp sleeve orig. ∅18-20
5 222 31.32.060 Dellorto 3318 $2.00 top screw M4-0.75 x 14 slot
6 110 31.32.230 Dellorto 6110 $5.00 top cover bare
6 110 31.32.230 Dellorto 6110a $15.0 top assembly
7 111 31.32.240 Dellorto 6111 $4.00 top gasket
8 111 31.32.070 Dellorto 3346 $10.0 throttle spring
9 111 31.32.210 Dellorto 6108 $8.00 throttle slide
10 110 31.32.300 000.31.32.300 $35.0 carb body stripped bare
11 111 31.32.330 Dellorto 6304 $0.30 clamp nut
12 000 31.32.039 Dell. 1486/48 $5.00 main jet 48
12 000 31.32.038 Dell. 1486/50 $5.00 main jet 50 very high alt.
12 000 31.32.030 Dell. 1486/51 $7.00 main jet 51 high altitude
12 110 31.32.033 Dell. 1486/52 $5.00 main jet 52 ’76-87 2.0 hp
12 001 31.32.032 Dell. 1486/54 $5.00 main jet 54 ’86-89 2.0 hp
13 111 31.32.050 Dellorto 2838 $10.0 float needle note 2
14 111 31.32.280 Dellorto 6122 $18.0 float
15 111 31.32.120 Dellorto 8773 $2.50 float pin
16 111 31.32.290 Dellorto 6123 $2.00 float gasket
17 111 31.32.200 Dellorto 6107 $5.00 float bowl
18 222 31.32.090 Dellorto 3598 $4.00 float bowl screw
19 110 11.32.710 Dellorto 6114 $7.00 choke plate
20 111 31.32.722 Dellorto 6105 $3.00 choke spring
21 111 31.32.732 Dellorto 5417 $3.00 choke screw
22 111 31.32.220 Dellorto 6109 $5.00 fuel filter
23 111 82.32.190 000.82.32.190 $12.0 inlet banjo 1/4″
24 111 31.32.080 Dellorto 3385 $1.50 inlet gasket
25 111 31.32.110 Dellorto 4190 $5.00 inlet screw
26 110 11.32.290 Dellorto 6112 $5.00 choke trigger
27 110 11.32.120 Dellorto 6115 $2.00 trigger pin
28 110 11.32.720 Dellorto 6259 $2.00 trigger spring
29 111 80.18.540 000.80.18.540 $15.0 air box
30 222 80.32.800 000.80.32.800 $5.00 air screen
31 111 80.32.250 000.80.32.250 $25.0 air filter
# NPF ’70’s # 0 ’89 price list # price C5, RD50 only
32 220 25.32.800 000.25.32.800 none holder screen
33 110 25.32.250 000.25.32.250 none air filter gauze
34 110 79.32.260 000.79.32.260 $40.0 air hose
35 110 35.32.270 000.35.32.270 $2.00 hose clamp substitute
36 110 31.32.250 Dellorto 6117 $9.00 air filter metal
# NPF ’70’s # 0 ’89 price list # price Var. Sport, SLE-X
36 001 31.32.250 Dellorto 6117 $9.00 air filter metal
37 001 00.00.000 0F0.32.00.711 none choke plate original
38 001 31.32.722 Dellorto 6105 $3.00 choke spring original
39 002 00.00.000 Dellorto 1476 $2.00 cable boot
40 002 00.00.000 000.31.32.020 $5.00 adjuster M6-0.75 w/nut
# NPF ’70’s # 0 ’89 price list # price for DS50 only
36 001 31.32.250 Dellorto 6117 $9.00 air filter metal
37 001 00.00.000 0F0.32.00.711 none choke plate original
38 001 31.32.722 Dellorto 6105 $3.00 choke spring original
44 001 00.00.000 0F0.41.00.461 none throttle linkage
45 001 00.00.000 0F0.41.00.471 none choke linkage
46 001 00.00.000 0F0.32.00.921 $5.00 choke adjuster M6-0.75
47 002 00.00.000 0F0.41.00.481 none pull rod
48 001 00.00.000 000.31.32.020 $5.00 throttle adjuster M6-0.75
49 001 00.00.000 0F0.32.10.231 none carb top
Note 1. The Spanish made Arbeo carburetor is distinguished from Italian made Dellorto by the goldish color instead of silver zinc.
Note 2. Many Arbeo SHA 12-12 carbs have a slow fuel leak around the pressed-in non-replaceable float valve seat.