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I just started working on a trx450r I believe it is a 2005. It has the older carb as well. It sat for a while so I went in a rebuilt the carb and went to check the valves. The exhaust valves were alright but the intake had no clearance and had a 120 shim in it so there is no adjustment. So then I threw it together and went to take it around the block. Runs great when cold but as it gets hot it has a bog like reaction if I go past 1/4 throttle no matter what. But it runs great when cold. I’ve been told this is valve float and is actually common on these. Just want to make sure before I go out and spend 500 to get new valves and seats. Either way though I’ll have to get a head job done :(

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