advice on 79cc transmission

obesepolice

Member
Apr 5, 2012
110
2
18
irving, texas
Im rebuilding my bike again with a 79cc predator. I need a transmission for it, but im not sure what to use. It will have the governor removed, 18lb valve springs, ported and milled head, exhaust and a 19mm carb.

Do I just use the standard clutch and jackshaft set up that comes with the kits, or make my own from better parts? Help with a parts list would be fantastic.

Grubee also makes a drive belt setup that looks like a quality piece of kit. allbet the gear ratio is abit steep. but i can change the ratios around

EZ motorbikes also has one but i cant seem to find any info for it.

there is a torque convertor but everything im finding is for a 3/4" shaft, i know you can use an adapter but i dont know what all that involves.

any help you guys can give me would be great
 

curtisfox

Well-Known Member
Dec 29, 2008
5,274
1,764
113
minesota
Simple 3/4" to 5/8" reducer bushing and a 3/16 " by 1/4 " keyway is all the adapter you need...........Curt
 

chainmaker

Well-Known Member
Jan 19, 2010
2,628
48
48
Ma USA
The qmatic is nice, I did one before..JBCruisin member here is a dealer still I think as well as AZBill. Jackshaft work as well relatively easily