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04 450r New Top End?????

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I bought my bike brand new and have had no problems. I have never had the valves checked which is turning out to be a big mistake. I took the bike in for yearly service and they noticed that "one of the intake valves had no clearance!" They are recommending a new top end.

How often should a person get the valves checked and is this problem preventable?

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Without the service manual in my hand, I would say to check the valves every couple of rides to be safe. I wouldn't say "you need a new top end", however if your intake valve clearances are going too tight, you're probably looking at a new intake valve job, because 02-05's valves tend to mushroom. When my 02 started to go tight, I would re-shim it and only 2 hours later they would be out of spec again.

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