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Discussion Starter · #1 ·
So I bought my 05 RMZ250 lat year and has given me nothing but problems, it’s acting like it’s running lean but nothing shows that it is I replaced the plugs, replaced the valves and just last night I replaced a dime sized o-ring on it and it still runs lean and overheats, I’m ready to sell the damn thing
 

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Did you clean the carb and change the jets?
 

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If you do change the head gasket, check the cylinder deck and head with a straight edge, make sure they are flat.
 
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