i have 05 trx450 that burnt a cam out and rocker arm and i bought new one to replace it i have les then two hours and it done it again the bike has lots of aftermarket parts such as stroker crank and bore kit it ruined the stage 2 hot cam then a stock cam can any one help do i not have enough oil going to the top of the head/ it seems to have oil up there but idk what the problem is

 

What brand and type of oil are you using and are you or I should say did you use a break in oil of any type?

 

Why was the crank replaced? just wanted to build or old crank burn up?