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3 May 2010
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Sprocket bolts
My sprocket bolts have stripped the threads getting an old sprocket off and are covered in loctite. I have got them all out and cleaned up the sprocket carrier, but need new bolts.
Can I just replace them with a standard steel bolt or do I need to find hi-tensile bolts with a suitable length non-threaded shoulder?
Thanks
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3 May 2010
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I'd just pic something up at the hardware store.
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3 May 2010
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You really want hi-ten steel on load bearing items. There's A LOT of different forces and pretty high stresses on your sprocket.
If you want to hold your transmission together with chocolate soft cheap bolts, then you're asking for trouble.
They just maybe ok for the life of the bike but is it really worth the risk for a few extra quid.
__________________
Did some trips.
Rode some bikes.
Fix them for a living.
Can't say anymore.
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4 May 2010
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+1 .... use Hi-ten
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4 May 2010
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Are the standard bolts Hi Ten ?
I think the standard bolts are mild steel (what does it say on the bolt head ?) due the cush drive taking alot of the sharp, sudden forces during hard gear changes and similar behaviour.
But the others are correct Hi tensile would be better and last longer, well longer than the sprocket anyway.
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4 May 2010
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Yah, look at the head of the bolts and replace with whatever was originally used. FWIW, I've got twice as many bolts on my KLR, and that might mean something (like, for example, that there's more stress on that attachment than you might suspect), which in itself suggests erring on the side of more thorough rather than less.
I'd answer differently if you were somewhere in the middle of nowhere in the Developing World....but you're not, right? Do you really want to ride that bike around all over the back of beyond wondering whether the strange new vibration you're feeling is related to using junk bolts on your rear sprocket? I didn't think so.
Mark
(from somewhere in the middle of noplace in particular, Bahia, Brazil)
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