Chain stretch

[balen1]

Yeh used the didvx2. That is interesting I'll look on the links when I get home. Yes used a Chain riveting tool. And yes the chain slack was uneven when first installed. Note ( old chain wasn't uneven).

[manicguitarist]

Ok - so it was uneven when installed - and hasn't been caused by riding it.

There is something awry and needs looking at. Do you have a local tame mechanic?

[balen1]

Sorry but unsure what you mean by a tame mechanic? Also what ifind strange is that the old set of chain and sprockets was fine. There was no uneven slack I'm the chain.

[dobbslc]

Check the sprockets both run perfectly true by putting a screwdriver against the teeth leaving about a 1mm gap and turning them round BY HAND! They should have an even distance from the teeth (tops and bottoms) to screwdriver all the way round. If they are ok then the chain is at fault.
Check the sprockets are mounted correctly and don't have a bit of grit under them etc.

[magg]

You could also wrap the new chain around the new rear sprocket, a section at a time, and check that none of the links can be pulled off the teeth. If there is a problem with either the chain or the sprocket, then at some point the chain will not sit tightly over the teeth.

Were the new chain and sprockets on when you were having your "clutch" problems. If so, may be chain or rear sprocket were damaged by snatching with missed gears or gears dropping out.

[balen1]

Ok so bought a new chain and fitted it and it had nothing to do with the chain, my bad for assuming. Same problem is happening. Tight spot then loose spot. I checked the front sprocket keeping a tiny gap with a sscrew driver like you said dobbslc , and it was all good. Haven't checked the back though I'll do that tomorrow. No as far as I recall the chain was fine when I had problems with my clutch. When I spoke to Graham from gf racing he said it may have something to do with the hub. good person to do business with btw. He said he'll happily refund the chain. Although I'm not going to now as it's not the chain. Any ways Any ideas?

[Dynamohum]

Have you checked the output shaft at the front sprocket for lateral movement and As gf suggested the rear hub ?

[balen1]

Yes checked the out put shafts which was fine so that's good. Checked the hub last night and there was no movement. However when I adjust my chain you can hear a lot of grit inside the swing arm. Could be can it maybe

[balen1]

Ok so checked the rear sprocket with a screw driver leaving a 1 mm gap. And it's clearly out however I believe it's the hub.

[willandrip]

It only requires the rear sprocket to run fractionally out of radius to effect the chain tension.

When you tension a chain, often half a turn of the adjuster is sufficient which shows how little (less than 1mm of adjustment) moves the large sprocket a tiny way but takes up a large amount of chain tension.

Sounds like you found your problem.

Often pattern sprockets that have poor mounting holes that allow slop or non shouldered fixing bolts cause the same problem.