I have read that the sliding blocks can be changed by just wedging the pulley in place and twisting each side to get it to slid open. I will see if that works.
If you have lost one of them it must mean they are worn enough to be thrown out.
Could this have been the problem you were having with the gearing/ratio changing??
I presume you are going to change all three??
Last edited by gilburton on Mon Nov 02, 2015 8:17 am, edited 2 times in total.
Thanks, but this it the rear pulley rather than the front pulley. The rear pulley appears to have a cir lip on it and requires it to be compressed, then the cir clip released.
Yeah sorry it's been some time since I last had one.
Anyway that yahoo group is very informative with plenty of info on the cvt so you are bound to get the info you need on there.
gilburton wrote:Yeah sorry it's been some time since I last had one.
Anyway that yahoo group is very informative with plenty of info on the cvt so you are bound to get the info you need on there.
Thanks indeed, I will see if they have a method to change them in situ
Ok as I see it you have to compress the spring somehow.
2 methods spring to mind (assuming you can remove the rear pulley)
1st method is to use some sort of valve spring compressor OR put it in a vice.
Before compressing get some large heavy duty cable ties (2 or 3) and feed them through the spring at equal intervals.
compress pulley and tighten up cable ties.
You'll probably need some blocks of wood to go across the pulley front and rear.
Remove circlip or if there is room replace ramps without removing circlip.
Leave cable ties in place until it is reassembled then cut cable ties with snips.
You could try a couple of ratchet straps with wood across the front and rear with the wood projecting out wider than the pulleys?
It'll turn slightly while compressing.
Just enough to take the tension off the spring so that the circlip comes off easily.
I don't think the spring is that strong so you might be able to twist the pulley by hand if you can get it in a vice??
On the bike you'll need to put some wood across the swinging arm to stop the wheel turning and possibly someone to tighten up the cable ties??
Can't guarantee these methods as I don't know what facilities you have but they are all methods I personally would try??
Its funny you say that, I have a big drill press that could be made to work. A bit of work with an angle grinder and a large old socket would probably do enough to replicate their tool I suspect.
A fuss over nothing, hold the back wheel still with something (Rear brake etc), twist the inside CVT pulley on the rear and it will rotate easily enough, put the new ones on with a wedge shaped piece of wood or metal and jobs done.
I haven't ridden it much since doing the chain but initial impressions seem to show that having a smaller rear sprocket does not affect the top speed in any way. It appears that the cvt takes up the slack in gearing.
