Twisted sprocket bolts on SV650

[Rad]

As it later turned out I took my rear sprocket off for no real reason at all, doh. When I was putting it back I decided to be [strikeout]anal[/strikeout] methodical about it. Google said 60nm so I tighten the bolts and started doing half turns in cross till I hit the right torque. The bolts weren't getting any tighter so I decided to get one tight. 2 turns later I knew something went wrong. I unscrewed it to reveal that the thread was gone.

I lowered the torque on the wrench to see how far off I was. Other bolts clicked at 52nm. I thought my wrench is busted so I borrowed my friends. His clicked at 54. After more googling I found a post where a guys said his twisted at mere 40. How often does it happen that the spec is so far from reality?

New bolts are in the post. I decided not to thread my old ones. This time I'm going with gut feel and loctite.

[Tango]

I'd invest in a Haynes manual if I were you.....

My Speedie rear sprocket nuts are 33nM.....

[Fozzie]

The Haynes manual says 60 guys!

However, these values are WAY too much for those bolts to handle.

At that value you could hold the rear axle on pretty safely!

Torque it to 40-50nm tops. I'd say 45 was enough.

But you've now got a fairly knackered wheel! So you're going to have to get that replaced.

[Rad]

I have the Haynes manual but it didn't have the torque for the bolts. The new ones are at ~45nm with loctite for good measure.

[Phil]

Amazing.....

I've just done the exact same thing this week and the bike is currently on the stand waiting.

Stripped threads after following the correct torque procedure.

I ordered some new bolts from my local suzuki dealership and was told I wouldn't need to order nuts as they're just a standard M10 thread. Got the bolts today to find out they're not a standard thread and they're a 1.25 pitch thread. I've now got to try and find some of those in the morning and most hardware stores don't stock them and need ordering. Hopefully my local nut and bolt supplier will have something suitable, they'll certainly have the nuts but probably not nylocs so it'll be lots of loctite.

Who'd have thought a simple chain and sprocket change would cause so many issues and it's the only weekend I've got off for a few weeks!!

@ Fozzie... the wheel won't be knackered but he may have to cut the old bolts off if they were stripped like mine were, they wouldn't undo.

[Chrissb6]

This chart might come in handy

http://www.leytonfasteners.co.uk/pdfs/T ... eGuide.pdf

[Phil]

Got my nuts sorted. Some nice stainless nylocs M10x1.25, 40 pence each. Bit better than the dealership prices of £4.50 odd each for the non stainless versions.

All sorted now and had a fantastic ride out yesterday