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chain and sprockets

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looking for input on chains and sprockets for a 03 crf 450. iam using the bike for motocross novice class plus 30

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Use a good quality O-ring chain such as D.I.D.,RK or Tsubaki. If the stock sprockets are good you can use the o-ring chain and get good life out of them. I have this combo and have 8 months on the bike with two chain adjustments. If your sprockets are worn use Renthal,Titax or Ironman. After washing your bike spray WD-40 on the chain to displace the water. :)

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some people say the stock rear sprocket is junk mine is new should i just go for both or just a chain for now. i've heard the stock chain can break easy

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Just put did x-ring and ironman sprockets. So far I haven't even had to adjust the chain yet (2 mx races so far-2 classes-open int. and 250 open)

1 year warranty on sprockets, I figured you can't go wrong with that if you are on a college student/part-time-worker-for-a-small-wage budget.

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I just slapped on a DID ERT chain. I used the stock sprockets. The ERT chain seems like you never have to adjust it once it is on the bike.

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throw that stock chain away before it wrecks your sprokets. run a oring and lube and clean with WD40. Works for me. P.S. be sure to flip your counter sprocket over to alow for clearance between chain and your case. A shim will work too. but this worked for me. Good Luck.

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I use a stealth 51 tooth rear, whilst it is good quality and i love it it, it does have a draw back and that is that the rivets hit the rubber in the chain guide. I had to cut holes in the rubber because it annoyed the hell out of me.

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I agree, scrap the stock chain asap. I went with a front and rear sprocket from sprocket specialists. And an RK XSO O ring chain. I flipped around the front sprocket, for clearance on the O :) ring chain, and so far its been great.

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Do you know what size shim to use behind the countershaft sprocket for an o-ring chain? I heard you can use an automotive valve shim, but I don't know what size. Thanks for any info! -Tim

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You can get an .015 an .030 and an .045 for about a quarter. I think I used the .030 but just measure the old chain with the shim that gets you = with the thickness of the new chain and you should be good to go! You can lay your old and new chain down side by side on their side, place a shim under the old chain and see if it is the same heighth as the new chain.

Randy

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