Belts

Contents:   1. Cogged Belts     2: V-Belts

 

 


1. Cogged Belts

These are also called timing belts and synchronous belts, because like a chain, they cannot slip. There are not many mopeds or mini-cycles with cogged (toothed) belts.

type T10, 10mm trapezoidal

 

type T5 profile
5mm trapezoidal

type S5M profile
5mm high torque

type 5M profile
5mm rounded teeth

 

 

 

 

 

610-5M-18

 

Besides different lengths and widths there are also different pitches and profiles (tooth shapes). So there are thousands of possible cogged belts. The belt length is the tooth count times the pitch. So a 610-5M belt has 610/5 = 122 teeth.

Di Blasi: The 1997-on DiBlasi R7E has a cogged drive belt 18mm wide, and has 122 teeth that repeat every 5mm (5mm pitch). One replacement that is shorter is 600-5M-18, with 120 teeth. It fits and meshes correctly, but only when the adjustment slots are lengthened. Here is a 600-5M-18 in New Jersey. A 610-5M-18 with 122 teeth is the original size. Here is a 610-5M-18 in New Jersey.

390-5M-20 & 390-T5-20

Laura M56: This engine from Holland is on 1978-80 Batavus and 1982-85 Trac mopeds. The original belt was 20mm wide, and specially made for that engine. It had 79 teeth that repeat every 5mm (5mm pitch). Very similar belts are black rubber Bestorq 400-5M-20 and 395-5M-20. But the 5M style teeth do not mesh right. Another replacement belt clear-gold colored (polyurethane) is Mectrol T5x390 (T5/390). It is 20mm wide 78 teeth (1 less than original). The T5 style belt teeth mesh well with the pulley, but the one-tooth-shorter length requires the large pulley be shaved down, to about 2/3 of the original pulley tooth height. Here is a 20T5/390 (too short) and a 20T5/400 (too long) both in New Jersey. A 20T5/395 with 79 teeth is the original size. Here is a 20T5/395 (395-T5-20) in China.

Jawa 210 and 225: The 1983-1995 Jawa 210 and 225 moped models have a cogged belt 25mm wide, and has 51 teeth type T10, that repeat every 10mm (10mm pitch). A 25T10/510 with 51 teeth is the original size. Here is a 25T10/510 (510-T10-25) in New Jersey. 

 

 


2. V-Belts

Table of Moped V-Belts

Moped Maker
Models or Types
Orig. no.
or Price
Width x Height
x Outer Length
Inch
Number
Metric
Number
Belt Manufacturer
Markings or Notes
Angel or Speed Bird
(non variator)
original
15.0 x10.0 x 907mm
0.51" x 0.39" x 35.7"
Sanwu (Taiwan)
895 3013
original
$15
15.0 x10.0 x 907mm
0.51" x 0.39" x 35.7"
Sanwu (Taiwan)
895 3013
Batavus VA, HS50, Starflite
(non variator M48 25,30mph)
original
480891
13.0 x 10.0 x 820mm
0.51" x 0.39" x 32.3"
Laura (Holland)
480891 A
substitute
$15
13.5 x 8.7 x 826mm
17/32" x 11/32" x 32.5"
17320
(32017)
13A0815 generic (automotive)
32017 13A0815
Batavus VA, HS50, Starflite
(non variator M48 20mph)
original
480893
Laura (Holland)
480893
substitute
N/A
Derbi Variant SL, SLE, TT
Var. Sport, DS50 (variator)
original
82 26 370
17.6 x 8.5 x 630mm
0.69" x 0.33" x 24.8"
Derbi (Spain)
Variant 82.26.37.0
original
$18
17.6 x 8.5 x 630mm
0.69" x 0.33" x 24.8"
Derbi (Spain)
Variant 82.26.37.0
Honda PA50 Hobbit/Camino
(variator)
original
23100...
15.0 x 9.0 x1085mm
0.59" x 0.35" x 42.7"
B type Mitsuboshi (Japan)
23100-148-7030
substitute
N/A
substitute
N/A
13.5 x 8.7 x1080mm
17/32" x 11/32" x 42.5"
12.7 x 7.9 x1067mm
1/2" x 5/16" x 42.0"
17420
(42017)
A40
AX40
13A1065 Gates (automotive)

Gates (industrial)
Honda NU50 Urban Express
(variator)
original
23100...
Mitsuboshi (Japan)
substitute
$18 (B31)
16.3 x10.3 x 864mm
21/32" x 13/32" x 34.0"
B31
BX31
Gates (industrial)
Motobecane 7, 40, 50, 50V
(variator and non-variator)
original
14756
14.0 x 9.0 x 830mm
0.55" x 0.35" x 32.7"
Optibelt (Germany)
172 115 MB 112 030
substitute
N/A (B31)
substitute
N/A
substitute
$20
substitute
$18
16.3 x10.3 x 864mm
21/32" x 13/32" x 34.0"
13.5 x 8.7 x 826mm
17/32" x 11/32" x 32.5"
14.0 x 7.9 x 828mm

12.7 x 7.9 x 813mm
1/2" x 5/16" x 32.0"
B31
BX31
17320
(32017)


AX30


13A0815

D24
Gates (industrial)

generic (automotive)
slips a little
Ventico (France)

Gates (industrial)
Peugeot 103 models
(variator)
original
48815
13.0 x 8.5 x 870mm
0.51" x 0.33" x 34.3"
5497 Hutchinson 5497
Peugeot N°11 048815
substitute
$15
substitute
N/A
13.5 x 8.7 x 877mm
17/32" x 11/32" x 34.5"
12.7 x 7.9 x 864mm
1/2" x 5/16" x 34.0"
17340
(34017)
A32
AX32
13A0865 generic (automotive)
34017 13A0865
Gates (industrial)
Peugeot 103
(non variator)
original
48987
9.5 x 8.5 x 845mm
0.38" x 0.33" x 33.3"
5379 Hutchinson 5379
Peug. N°11 048 98700
substitute
$12
9.5 x 9.0 x 845mm
0.38" x 0.35" x 33.3"
D 255 Ventico (France)
D 255
Peugeot 101, 102
(non variator)
original
46068
9.5 x 8.0 x 735mm
0.38" x 0.31" x 28.9"
5378 Hutchinson 5378
Peug. N°11 046 06800
substitute
N/A
substitute
N/A
9.5 x 8.3 x 737mm
3/8" x 21/64" x 29.0"
9.5 x 8.0 x 740?mm
0.39" x 0.31" x 29.1?
3V290
3VX290


D 213
Gates (industrial)

Ventico (France)
D 213
Solo Odyssey
(non variator 1 or 2 sp)
original
00 57 176
10.0 x 6.0 x 730mm
0.39" x 0.24" x 28.7"
Optibelt (Germany)
Solo 00 57 176
original
$18
substitute
N/A
10.0 x 6.0 x 730mm
0.39" x 0.24" x 28.7"
9.5 x 8.3 x 725mm
3/8" x 21/64" x 28.5"


3V285
3VX285
Optibelt (Germany)
Solo 00 57 176
Gates (industrial)
Vespa Ciao C7N, C7E
(non variator)
original
102905
9.7 x 9.0 x 970mm
0.38" x 0.35" x 38.2"
Pirelli (Italy)
2931-102905/9
original rear pulley 94mm



smaller pulley 75-80mm

smaller pulley 65-70mm
substitute
$15
11.9 x 7.9 x 978mm
15/32" x 5/16" x 38.5"
9.5 x 9.0 x 960mm
0.38" x 0.35" x 37.8"
9.5 x 9.0 x 940mm
0.38" x 0.35" x 37.0"
9.5 x 9.0 x 925mm
0.38" x 0.35" x 36.4"
15380
(38015)
11A0965
11AV0965
10A0960C
10AV0960C
10A0940C
10AV0940C
10A0925C
10AV0925C
Gates (automotive)

Dayco (automotive)

Dayco (automotive)

Dayco (automotive)
Vespa Ciao C7V
(variator)
original
102906
13.0 x 7.0 x 975mm
0.51" x 0.28" x 38.3"
Pirelli (Italy)
2632-102906/9
substitute
N/A
12.7 x 7.9 x 965mm
1/2" x 5/16" x 38.0"
A36
AX36
Gates (industrial)
Vespa Bravo, Grande
(variator)
original
130937
13.0 x 7.0x1050mm
0.51" x 0.28" x 41.3"
Pirelli (Italy)
substitute
N/A
substitute
$15
substitute
$10
12.7 x 7.9x1041mm°
1/2" x 5/16" x 41.0"
12.7 x 7.9x1041mm
1/2" x 5/16" x 41.0"
11.9 x 7.9x1042mm
15/32" x 5/16" x 41.0"
2410
(4L410)
A39
AX39
15405
(40515)




11AV1030
Gates (industrial)

Gates (industrial)

generic (auto)
slips a little
Vespa Si, Boxer
(non variator)
original
124593
9.5 x 9.0? x 1143?mm
0.38" x ???? x ????
Pirelli (Italy)
substitute
N/A
9.5 x 1140/1150
0.38" x ???? x ????
Vespa Si, Boxer
(variator)
original
122192
13.0 x 7.0x1143?mm
0.51" x 0.28" x ????
Pirelli (Italy)
substitute
N/A
12.7 x 7.9x1092mm
1/2" x 5/16" x 43.0"
2430
(4L430)
Gates (industrial)
Vespa (unknown)
(non variator)
unknown
$15
9.7 x 8.5 x1050mm
0.38" x 0.33" x 41.4"
TD? 5332

 

V-Belts Explained

The smooth sides of V-belts are what grips the pulley. The harder the pull, the more it grips, because of the V angle. The top and bottom do not touch anything. 

Moped V-BeltsFirst is a graphic showing the cross-sectional shapes and sizes of replacement V-belts that can be used on mopeds and small scooters. V-belts for variators (variable pulleys) are the “low profile” type, called “variable speed belts”. V-belts for fixed pulleys are the “high profile” type, called either “classic” or “cogged”, see below.  

V-belts are made by Gates in different styles, widths, and lengths. Here the width choices from 9.5 to 17.5 mm. Larger or smaller sizes are omitted. 

9.5 mm  3L, 3V, 3VX
10.0 mm 10X, SPZ, XPZ
11.9 mm automotive 15
12.7 mm 4L, A, AX
13.0 mm 13X, SPA, XPA
13.5 mm automotive 17
15.9 mm 5V, 5VX
16.0 mm SPB, XPB
16.7 mm 5L, B, BX

17.0 mm 17X
17.5 mm automotive 22

 

Smooth or Notched: The notches, or cogs, on V-belts are not teeth, like on toothed belts. They are relief slots that help the belt bend easier, for less friction and more efficiency. Equipment that originally had smooth belts can use cogged belts, and visa versa.

   

 

Laura M48 engine versions

 

Batavus/Laura M48 20mph v-belt: So far there is only a part number and a photo, but no width, length or belt number available. It’s size can only be estimated from this photo. If anyone knows, please tell Shaun by email.

 

More about V-belts:

http://www.smex.net.au/reference/Vbelts02.php

 

Batavus/Trac/Laura M56 toothed belt: The only mopeds with a toothed drive belt are the 1978-80 Batavus Regency, wit Laura M56 engine,  … continued later …