trx450Rrider
11-15-2008, 02:19 PM
i have been doing heat cycles for the past couple days now and today i finally did the full throttle runs and it cuts out alittle bit on the top end. it will still rev out tho. it runs awesome untill i nail it. i blew the crank up and it ran perfect before that happened and i just got it back from the shop. he put a new piston and rings and everything which is why im doing the heat cycles. i think it is because when it was running good i was running a 44 to 1 or 50 to 1 mixture on c12 octane and right now for break in im running 32 to 1. would that make it run funny on top end? i checked the plug too and it looks like its running rich and the plug was wet alittle. i put a new plug in and it does the same.