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General Category >> Rubber Side Down! >> Kawasaki rear pulley mod
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Message started by Chip 2010 on 03/25/18 at 13:30:02

Title: Kawasaki rear pulley mod
Post by Chip 2010 on 03/25/18 at 13:30:02

Does anyone know how much length we gain if we add only the Kawasaki rear pulley? The reason I ask is because I was looking at the voodoo vintage custom hard tail and wondering if I could make up the extra 4" of length with the smaller Kawi rear pulley. Even if I had to make some adaptations to bring it a bit closer. I switched from the pulley to the chain and sprockets several years ago and could never figure out why I went through a chain every thousand miles. So switched back to the belt and stayed off the freeway.

Title: Re: Kawasaki rear pulley mod
Post by badwolf on 03/25/18 at 14:01:19

The teeth are 7mm on center. If you need 4 inches you need a lot smaller pulley.

Title: Re: Kawasaki rear pulley mod
Post by Dave on 03/25/18 at 14:01:28

The Kawasaki KZ750 pulley is 3 teeth smaller.....I will go out an measure the difference - but the extra length is likely going to be an inch or less.

There is another Kawasaki pulley that has a lot less teeth and might get you a lot more change....I can't remember what model it is.

I also believe some of the Kawasaki belts could be longer.

Title: Re: Kawasaki rear pulley mod
Post by Chip 2010 on 03/25/18 at 16:11:03

thanks Dave. I'll look around and see what I can find, I tend to spend a lot of time thinking about my mods before I start on them.

Title: Re: Kawasaki rear pulley mod
Post by Dave on 03/25/18 at 18:09:04

I believe the KZ440 used 2 different size pulleys:

This one is the big one (same 65 tooth as the KZ750 but fewer mounting holes).
https://www.ebay.com/itm/1983-80-83-KAWASAKI-KZ-440-KZ440-LTD-BELT-REAR-PULLEY-DRIVE-SPROCKET-HUB-OEM-82/263549050417?hash=item3d5cbf5e31:g:AaoAAOSwHMJYK3j3&vxp=mtr

This one is smaller - but I don't know how many teeth (and it could also be narrower).

https://www.ebay.com/itm/KAWASAKI-KZ440-LTD-REAR-PULLEY-Belt-DRIVE-SPROCKET-HUB-1981-82-83-80-84/282898602404?hash=item41de1219a4:g:GEAAAOSw4tNajwQI&vxp=mtr

One version of the KZ440 belt is 129 tooth.
https://www.ebay.com/itm/GENUINE-Kawasaki-KZ-440-Final-Drive-Belt-Pulley-129-TOOTH-59011-1009/183109871168?hash=item2aa232e640:g:3csAAOSwJXhanSvN&vxp=mtr

The Vulcan 500 also uses the same type Bando belt.....not sure of the length of that belt or the KZ750 belt.

There is a lot to look at and explore.