12" Pro Rear Wheel Axle Spinning?

[hugh_b]

Hi everyone,

I broke/crushed one of the standard snail cams on my 2012 pro so i purchased some s3 max cams.

The cam that fits onto the drive side of the bike had to be pressed onto the enlarged ridge and i've done everything i normally do but i can't stop the axle from spinning! I only had this problem once with the original snail cams but after a quick clean up i didn't have a problem.

Any tips? I can see a small gap between the swing arm and the wheel spacer on the drive side.

Thanks

[arnoux]

I have come across this problem once in our workshop and the Pro in question had a wheel spacer intended for an AJP set up on a later model bike with Formula brakes. (there was a bit of wheel swapping at the WTC in Australia and spacers got mixed up on the bike in question).

The wheel spacers are different thicknesses for AJP and Formula setups. This allowed the axle to sit out too far from the swingarm, so when you tightened the disc side axle bolt it just pulled up against the axle rather than the swingarm.

If you fit the axle and S3 snail cam as you would from the sprocket side, then it should be a fraction short of sticking out from the right edge of the right swingarm leg. If it is proud or flush of this then you need to space the axle to the bikes left - either with a slightly thicker wheel spacer or a shimming washer.

Basically it probably means the snail cam you fitted is a fraction thinner than the one that came off it causing your problem.

Edited August 30, 2012 by arnoux

[hugh_b]

Thanks for your help. I had a look again this evening. The standard gas gas cam has a recess machined into it which the s3 cams don't have meaning the axle bottoms out before it's taken up the tension.

as i don't have a lathe anymore i've decided to purchase an aftermarket axle kit with tensioners. I've noticed the top Gas Gas guys are all using the old style axle kit too.

Edited August 31, 2012 by hugh_b