well got to take it out for a test ride sunday, i definitly going to have to jet up, i checked the plug and it is a little lean. with the thicker head gasket it seems like it pulls harder after 2 laps my arms were getting tierd from the pull. here is whats funny i tried differant things, if i roll the corner 3rd wfo and bang 4th and keep it wfo to the next corner alittle over rev down the strait and it is fine not to happy how much it is reving but atleast it doesnt fall flat. same corners but if i shift to 5th on the strait is will pull for a few seconds but falls flat and when down shift to 4th it still acts like no power and stubbles alittle into the corner after the strait for about 5 seconds or so. only have one more weekend or racing this year but 2 classes, i think i will just change the front sprocket 1 tooth bigger so i dont have to use fith and start using 2nd in the tighter corners.
Higher gear = more load on the engine , more load creates heat. Especially if your jetted a little too lean. Get you jetting sorted. The thicker head gasket lowered compression a little freeing up the overrev and probably making a little more power.
is there a ignition timing that can be backed off alittle, i didn't get much time on the track to test sunday guy was being a dick, was only letting bikes out on track he did let me take 4 laps to feel it out a bit i tried couple differant things. but didn't give me time to rejet or anything sucks living in city i just cant go out a flog on it when i want. but i am goin to make practice day sat and race sunday, hope i can work out some othe bugs, did'nt even get to set power valve maybe rpms to low for 5th???
running a 12 front with 39 rear and 18 tire. that should be about stock gearing if i was to be runnin the 20 tire with a 42 rear.