TT 250 47 tooth Sprocket Bolts To Long?
 

I ordered the 47 tooth sprocket from CSC and when I tried to put the new bolts in they seemed like they were too long. They're also considerably longer than the stock ones. I screwed them in, was really cranking on them and they seemed like they had about a 1/4 inch or so to go. Didn't seem right to me. Has anyone else had this problem? Do you really have to crank on them to get them all the way in? :hmm:

The stock bolts worked just fine, so that's what I used, but today, three of the bolts loosened, and fell out. I'm thinking about giving the bolts that came with the 47 tooth kit a second chance so I don't have to wait two weeks for bolts from CSC. Any suggestions or tips on getting them in?

Do some numbers....before you start swinging on a big spanner..
hole depth / sprocket thickness / bolt length..



..

Personally, I'd just use stock bolts, if the ones thst came wirh it did it did. and if you don't have them, I'd go to a. hardware store and find the exact match with high grade bolts. they'll work just aswell.

Run a Tap Down Thise Threads!
 

I found that you need to run a tap down those sprocket holes. I'm not sure if they are full of locktite or were never threaded well but after doing that the CSC supplied bolts threaded smoothly with both spacers. I mentioned it in this thread post #3:
http://chinariders.net/showthread.ph...ear#post287184

Thanks man! I'll do that. I have a funny feeling I'm going to have to re-tap them anyways. The old bolts are really chewed up now. Thanks for the reply, this should do the trick!:thanks:

I was going to order new stock bolts, but they are the ones that got me into this mess.

Thanks Pete, will do!

Don’t try using a longer wrench for torque
 

Do as Pete says and check the depth of the threads and hole, check for obstructions, and thread pitch.
Don’t try to force them to tightness with a bigger wrench.
And going to a store to purchase high grade, correct length, diameter and pitch bolts is very important to keep from screwing up the rear hub.

I also had the same exact issue. The new bolts were too long and the old ones backed out after the sprocket swap. When they backed out the threads got damaged so i had to drill my hub out and retap the threads. To answer your original question though, the threads are not deep enough for the replacement bolts

I didn't use the CSC sprocket and just reused the stock bolts after running a tap up and down each hole just to clean them out. Then I used blue locktite.

That said, doesn't the CSC sprocket come with spacers????

The spacers that come with the sprocket are for proper alignment of the chain, but even with those on the bolts are too long I found.

I bought a tap and die set. re-threaded the holes and the new bolts fit perfect. I really didn't have to use a lot of force, just run the proper size tap through the holes. Worked great, added locktite, and bolts screwed in no problem.