2005 crf450 questions

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8/30/2018 4:20 PM

I bought this bike for a pretty good price. Was in the market for a new 450 but a friend of mine sold me his for really cheap, was a trail bike and ridden once or twice a year at pismo. I’m going through it and replacing some of the pretty worn out parts. Going to do both sprockets and just wanted to double check to see what stock sprocket sizes are? 13/48? . Also If the crush washers were never charged with oil changes would they leak? I don’t see any oil coming out of the drain bolts but when I brought it home and cleaned it up I noticed a little oil underneath the cases. I did my best to inspect and I don’t see any cracks or anything. Any information or tips on this bike is greatly appreciated.

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8/30/2018 4:23 PM

Yea the crush washer should be replaced every oil change. Or the threads could be messed up. Teflon tape is a good temporary fix.

Not sure about the sprockets.

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8/30/2018 4:47 PM

kb228 wrote:

Yea the crush washer should be replaced every oil change. Or the threads could be messed up. Teflon tape is a good temporary ...more

I’m going to get the crush washers this weekend and change them both out this weekend

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8/30/2018 5:05 PM
Edited Date/Time: 8/30/2018 5:05 PM

On the 2005 CRF450 R the washers are not crush washers, but rather alloy solid units. They can be reused many times. They will leak some after several uses, so if you put on the OEM washers they will last a good while. Remember that you should not over tighten them as they are on the hollow case with the drain bolts screwing into the case behind the ones the head is on. You can damage the case if over tightened.
I think 13/48 is correct. I use 14/50 with my Rekulse clutch as it will pull it fine.

Paw Paw

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