uneven chain tightness

[keratos]

When the chain is at its tightest there is around 5 mm of play but when its at the slackened part there is around 15-20mm of play.

the yam service manual suggests 30-40m of slack is appropriate. your chain , on this basis, is dangerously over adjusted to the point where it is "too tight", may cause wear in the drive mechanisms, snap the chain, wrap around your wheel and stop the bike ! not something one would want to occur at speed I would imagine - perhaps the more sporty risky lads would find this exciting - I wouldnt.

[unfazed]

When the chain is at its tightest there is around 5 mm of play but when its at the slackened part there is around 15-20mm of play.

Don't even ride that bike until you slacken off that chain. It will break the chain and probably break the crankcase. Properly adjusted at its tightest section it should just press against the rubber swinging arm protector. 

[aj1soad]

ive slackened the chain now. the noise seems to have gone a alot quiter but the problem is still there where it gets tight. guess ill just have to order a new chain and sproket

[keratos]

ive slackened the chain now. the noise seems to have gone a alot quiter but the problem is still there where it gets tight. guess ill just have to order a new chain and sproket

yeah, like unfazed said, that noise was probably the crankshaft/case disintegrating  :b :rolleyes

[unfazed]

[quote author=aj1soad link=topic=14177.msg160554#msg160554 date=1406833473]
ive slackened the chain now. the noise seems to have gone a alot quiter but the problem is still there where it gets tight. guess ill just have to order a new chain and sproket

yeah, like unfazed said, that noise was probably the crankshaft/case disintegrating  :b :rolleyes
[/quote]

:lol :lol :lol