just bought a 03 cbr 6000rr. kid I bought it from put an after market front sproket on it, because of this he had to slide the rear wheel all the way back. noticed during maintenance that I have2"+plus of chain slack but no more room for adjustment. not sure if The stock chain is stretched or I need to if possible move wheel up and use a smaller chain?????????? any help is welcome.

 

The chain is either stretched or was never cut down to the proper amount of links. Some chains come pre cut, some dont.

 

Take excess slack out of chain by pressing up on chain midway between front and rear sprocket. While holding chain tight try to pull the chain away from the back sprocket. If you can pull the links more than about a quarter inch away from the rear sprocket or if you can see the bottom of the "u" between sprocket teeth, it's time for a new chain.
If chain doesn't pull that far from the sprocket, you could shorten chain by a couple links to bring the wheel back to the proper adjustment zone.[IMG]https://cbrforum.com/forum/

 

Did he only replace the sprocket? If didn't replace the chain at the same time, you should probably just buy a new sprocket set. Introducing a new item to worn out items in the system will only wear out all of the items in the system extremely fast. Sprockets and chains wear together, so any new part, be it chain or sprockets, will not match up and wear out fast.

How many miles are on the bike?

 

^ +1.

112 links is stock chain length for the 03 600rr. What are the sprocket sizes that are your bike now? Til you can buy a new chain & sprocket set, I would move the wheel forward to the new chain position & cut the chain to proper length (w/ proper slack of course) & put a new master link on.

A chain as loose as you describe, is nothing but trouble. You do not want a chain to come off while you are riding. It will ruin your whole day (or worse).

ETA: Welcome to the forum. :-)

 

thanx for the help, sounds like i'll get a sprocket set and new chain.

 

make sure you keep at least 1.5 inches of slack in the chain too. Do not over tighten.

 

talked to the kid I bought it from. went down two teeth on front sprocket and left the stock rear sprocket and chain. this was all done about 5 years ago, so I'm gonna replace sprockets and chain. don't have all the tools needed for this so I will be bringing it too local bike mechanic that got mixed reveiws. I'll kill this guy if he scrathes up all the chrome aroud tht chain and sprocket.

 

You can do this if you're at all mechanically inclined. Really, all you need is a rear stand, wrenches, ratchet & sockets, dremel drill w/ cut-off wheel, & chain tool kit.

I know its easy for me to say that b/c I know how to do it. But really, its not hard at all. "Incognito" has a fantastic HOW-TO here on the board... https://cbrforum.com/forum/how-mechanical-40/chain-sprocket-swap-97641/ . I do my installs almost the exact same way. If you've never done this b/f, the HOW-TO has excellent instructions & pics to walk you through it.

Even if you have to buy chain tool kit ($60-90), I guarantee you that it will pay for itself w/ the first use.

If you don't want to chance it, I understand, especially if you've never done this type of thing b/f. Just wanted to encourage you to consider doing it yourself. Good luck.