Chain Loose in some spots and tight in others?

[rgvkid]

Its a fairly new chain only has about 2 hours on it. It has about 5/8 inch play in but in one spot it tightens up pretty taught. Is this normal?

The Sproket and clutch are aligned up fine.

 

[the-cyborg]

Sounds like your rear sprocket is not perfectly round, or miss aligned on the hub, and/or if it is on a live axle you could have a bent axle.

 

[Doc Sprocket]

I vote bent shaft. Take chain off, and spin shafts by hand keeping a close eye on it. You may have to clamp something very close to the edge of the sprocket and watch the gap as it turns.

 

[machinist@large]

I vote bent shaft. Take chain off, and spin shafts by hand keeping a close eye on it. You may have to clamp something very close to the edge of the sprocket and watch the gap as it turns.

50/50 on the shaft itself; sprocket may have one area bent (folded over) over. Sideswiping/ landing on something solid could do it.

 

[Wim]

as above.

also, take chain off and check the links, any stiff/jammed? ...could be stretched in one place?