Contents
carburetor yrs mph Honda model
8. PA29C-D ’84-87 30 NQ50 Spree, NB50 Aero
14. PB15A-A ’82-83 00 C70 Passport
8. Keihin
# size carb code mph models
a 12 PA29C-B GK8 30 84-85 NQ50 Spree
b 12 PA29C-D GK8 30 85-85 NQ50 Spree
c 11 PA29D-A GK8 25 84-85 NQ50 Spree
d 11 PA29D-B GK8 25 85-85 NQ50 Spree
e 12 PA29H-A GE8,GN2 83-85 NB50 Aero
1. 1983 Honda NB50M Aero
2. 1985 Honda NQ50 Spree
3. 16100-GK8-673 Keihin PA 29C-D
4. 16010-GK8-003 gasket solo-set
Flange Mount: The flange mount holes on ’84-87 Spree carburetors are spaced 35mm, center-to-center. That is different from ’74-78 PC50 32mm, ’82-83 NC50-AA 36mm, ’77-83 NC50 38mm, ’79-on Z50 32mm, and ’76-78 Z50 38mm.
These were zippy 50cc two-stroke automatic scooters that maxed out at 30mph to meet many US state’s moped laws. They have electric start so there is 12 volt battery power to operate an automatic electric choke. They also have a gas gauge and an automatic vacuum petcock on the gas tank. You don’t have know very much to operate one. They had a CVT variator that continuously changes the belt drive pulley size ratio, for very quick acceleration.
Idle Mixture Screw: The idle mixture screw is an “air screw” that blocks off an air channel.
Main Jet: The main jet is a screw-in, recessed-type, M6-0.75 thread, size 68 (0.68mm).
Pilot Jet: The idle jet is not replaceable. It is inside the upper end of the brass tube, pressed into the main body, on the engine side of the main jet.
Float Seat: This carb does not have a replaceable float needle valve seat. The seat is part of the main body, and must be cleaned and polished with a spinning Q-tip.
Float: non-stirrup type white plastic 16013-147-004 see 6-4.0b, non-stirrup needle valve 16155-883-005 see 6-2.0b
Top Cap: M18 x 1 thread
The float bowl gasket in the illustration looks like the NC50-type, but it’s not. The actual gasket has an additional loop, for a vent and overflow.
o# abcd price Honda part# carburetor
o0 1000 N/A 16100-GK8-671
o0 1000 N/A 16100-GK8-672 PA29C-B ’84-85 NQ50, NQ50-A (US)
o0 0100 N/A 16100-GK8-673 PA29C-D ’85 NQ50, NQ50-A (US)
o0 0010 N/A 16100-GK8-731
o0 0010 N/A 16100-GK8-732 PA29D-A ’84-85 NQ50-AA (US 25 mph)
o0 0001 N/A 16010-GK8-733 PA29D-B ’85 NQ50-AA (US 25 mph)
o0 0000 N/A 16100-GK8-871 PA000-0 ’86 NQ50-A
o0 0000 N/A 16100-GK8-881 PA000-0 ’86 NQ50-AA
o# abcd price Honda part# parts list
o1 1111 $21 16010-GE8-305 gasket solo-set 1b 1c 1g 1v 1z
o1 1111 $21 16010-GK8-003 gasket solo-set 1b 1c 1g 1v 1z
o1 1111 $22 16010-GE8-315 gasket multi-set 1b 1c 1g 1v 1z 1x
1b 1111 $$8 00000-000-000 top rubber washer 13 x 16.5 x 1
1c 1111 $$2 00000-000-000 intake o-ring 2 x 20 (24 od)
1g 1111 $$2 00000-000-000 drain plug o-ring 1.5 x 4 (7 od)
1v 1111 00000-000-000 float bowl gasket 2.5 x 1.5 with loop
1z 1111 00000-000-000 choke bystarter o-ring 1 x 16 (18 od)
1x 0000 N/A 00000-000-000 choke o-ring (some) 1 x 12 (14 od)
20 1100 N/A 99101-187-0680 jet 68 30mph versions
20 0011 N/A 99101-187-0650 jet 65 25mph version AA
1. 16100-GN2-601 Keihin PA 04H-A
2. 16100-GN2-633 Keihin PA 046-A
3. 16100-GE8-013 Keihin PA 05A-??
4. 16100-GE8-613 Keihin PA 05A-H
o0 0000 N/A 16100-GE8-613 carburetor PA05A-H ’83-84 NB50M
o0 0000 N/A 16100-GE8-672
o0 0000 N/A 16100-GE8-673 carburetor PA050-0 ’83-84 NB50M (US)
o0 0000 N/A 16100-GE8-003 carburetor PA050-0 ’84 NB50M (DK)
o0 0000 N/A 16100-GE8-013 carburetor PA050-0 ’84 NB50M (DK)
o0 0000 N/A 16100-GE8-601 carburetor PA050-0 ’84 NB50M (UK)
o0 0000 N/A 16100-GE8-611 carburetor PA050-0 ’84 NB50M (DE)
o0 0000 N/A 16100-GE8-621 carburetor PA050-0 ’84 NB50M (FR)
o0 0000 N/A 16100-GE8-671 carburetor PA050-0 ’84 NB50M (CA)
o0 0000 N/A 16100-GN2-601
o0 0000 N/A 16100-GN2-602 carburetor PA04H-A ’85 NB50M (UK)
o0 0000 N/A 16100-GN2-621
o0 0000 N/A 16100-GN2-622 carburetor PA040-0 ’85 NB50M (FR)
o0 0000 N/A 16100-GN2-633 carburetor PA046-A ’85 NB50M (US)
o0 0000 N/A 16100-GN2-671 carburetor PA040-0 ’85 NB50M (CA)
o0 0000 N/A 16100-GN2-672 carburetor PA040-0 ’85 NB50M (US)
o0 0000 N/A 16100-GN2-871 carburetor PA040-0 ’86 NB50
o0 0000 N/A 16100-GN2-872 carburetor PA04P-A ’86 NB50 (US)
o0 0000 N/A 16100-GN2-762 carburetor PA04W-A ’87 NB50 (US)
Motorcycles
14. Keihin PB 15A-A on #GB4 1982-83 Honda C70 Passport (US)
Keihin PB15A-A
Flange Mount: 36? mm hole spacing
quantity
o# ⇓ Keihin PB (a)15A-A
o# a price Honda part#x description xxx specs
o0 1 N/A 16100-174-673 carburetor PB 15A-A 1980 C70 Passport (US)
o0 1 N/A 16100-174-772 carburetor PB 15A-A 1981 C70 Passport (US)
o0 1 N/A 16100-GB5-671 carburetor PB 15A-A ’82-83 C70 Passport (US)
o1 1 N/A 16010-GB4-013 gasket solo-set
o1 1 N/A 16010-141-305 gasket multi-set