Stripped front sprocket bolt

[japanada]

So after finally getting some parts in, new sprocket cover, DID chain, and F/R sprockets, I decided to dive into the start of the fix. I got the fairings and front sprocket cover off, but I ran into a problem. It looks like the pre owner has stripped the small hex head bolt that holds on the large 32mm front sprocket bolt !!

I feel I am at a loss and dont know what to do other than return the parts I bought and pay double the price at the local shop.

Any fixes a garage wrencher could try?

[steves]

A picture would certainly be useful here to understand exactly how bad it is...

But 32mm = 1 1/4"

So I'd be looking for a standard size socket 1 1/8 or 1 3/16 and hammer that bad boy on to get it off.

[shpielers]

+1 pic would help. I've had luck doing that ^ before, as well as cutting the nut off using a dremel. Need steady hands to not cut too deep and screw up the bolt, and a die to run over the threads afterwards. You could also use a hack saw blade, but it will take a long time. When the metal is thin enough, it usually cracks the rest of the way through, which loosens it, and you can spin it off at that point.

Either way, need a new one, don't reuse it.


Edit: think I misread that. It's the hex part that's shot? Try cutting a slot into it and using a screwdriver. Deep cut and use the widest blade screwdriver you can find.

[steves]

Wait maybe I misread that too. It looks like the PO stripped the small bolt that retains the speed sensor and the sprocket nut?

[japanada]

Wait maybe I misread that too. It looks like the PO stripped the small bolt that retains the speed sensor and the sprocket nut?

You are correct. Check out the pic below, not my bike, and I think its a GSXR but for this view itll work. Its the small hex bolt that the finger is pointing to.

[steves]

Just carefully dremel a slot on the head and turn it out with a flat head screw driver, or pound in the closest standard size hex driver you can find.

[arsenic]

Dude, use a bigass open end wrench. Have someone stand on the rear brake pedal and lean. You can get it loose, I have faith.

[B-Man]

So after finally getting some parts in, new sprocket cover, DID chain, and F/R sprockets, I decided to dive into the start of the fix. I got the fairings and front sprocket cover off, but I ran into a problem. It looks like the pre owner has stripped the small hex head bolt that holds on the large 32mm front sprocket bolt !!

I feel I am at a loss and dont know what to do other than return the parts I bought and pay double the price at the local shop.

Any fixes a garage wrencher could try?

Take a pry bar, breaker bar, etc. and wrap it in a towel. Put it between the spoke on your rear wheel and the swingarm so it cannot rotate.

Put a 6 point socket on the 32mm nut and remove.

Reverse the procedure to reinstall.

OR - Use an air impact wrench with a six point socket to remove it.

[arsenic]

You only have too do all that if you already removed the chain. If the chain is still there, just apply the rear break.

[B-Man]

If you work alone (like I do most of the time) it is hard or impossible to apply the brake and try to wrench at the same time.

[shpielers]

I've got awkwardly long limbs - possible to do by myself, but still easier to put something between the wheel and swing arm.

[arsenic]

If you work alone (like I do most of the time) it is hard or impossible to apply the brake and try to wrench at the same time.

Do you have kids? That's what they're for.

[92xjunker]

I do work alone, I use a 2x4 threw the wheel with a rag wrapped around it.

[japanada]

its not the 32mm nut that I cant get off. It is the little retaining 6mm hex head that needs to be removed before the 32mm can be accessed.

[arsenic]

Just drill the head off the socket cap bolt and replace it with a new one.