Topic: Loose bolt on front sprocket.

[jtb]

I seem to have a recurring problem with the bolt on the front drive sprocket, it loosens up by about 2 turns.  Last night I took the bolt out and put blue locktite on the threads and tightened it to about 23 ft/lbs.  Any other ideas?

[MRieck]

Tighten it up to 30lbs or so.

[jtb]

Thanks, Mike

[Porscheguy912]

Hellloooo,
I know this is a resurrection of a old post but i think its a relevant question....

So my front sprocket bolt came loose and cracked the outer case cover.
I need to get a new bolt because the old one is cashed. Anyone know what size and pitch that bolt is?
I have a 78 CB750F with the single bolt in the middle.
Also, shouldn't it have a lock washer on there? All that's on there now is a fender washer.

I didn't find the info in the factory manual either.

Thanks!

[bwaller]

8x1.25mm and I measure about 16mm of thread. There should be a lock plus a large flat washer.

[KingCustomCycles.com]

Weren't some of these sprockets designed to "float" giving the appearance of being loose?

[Johnie]

Yes, the front sprocket has some play in many of these vintage bikes. Keep in mind Honda suggests Lock-Tite on the 2 smaller sprocket bolts.

[SOHC Digger]

I had the same problem before and no matter how tight I got the bolt, it would still walk out.  Finally I put red loctite on the threads and it has stayed put ever since.  Blue loctite should work for you, but if not, step up to the red.