well. I seem to have many problems with this superhead. I added it on along with the dome piston. I set the valves and the timing all correctly. For some reason the bike overheats really fast. It also starts running really bad as it heats up. I rode it today for a little while and i actually had motor oil on my airfilter. I dunno how that all worked out. My bike almost seized too. The kickstarted stuck then after it cooled down it started first kick again. I also am noticing oil seeping outta ALL the oil seals. All this from changing the piston and head? I dont have any breather tubes or oil cooler on this head yet, but I'm hoping that, that is indeed the problem. I'm hoping someone else has had a similar problem and can giude me in the right direction. btw it runs fine up until it heats up REALLY fast.