Hey guys I'm at a stand still because I don't know what my next step should be. My compression is about 115 in each cylinder but I haven't checked since my last big ride. So it seems like the top end is getting worn out since I heard stock compression should be about 130. I don't know the condition of the cylinders previous owner said it was just redone and was bored to a 400cc but I don't think it was since he said it had a bad throttle cable and that's why it reved high at idle but come to find out it had a stretched cable, a broken reed and nowhere near the correct jetting.but assuming they are decent and only need a hone should I go with a port and wiscos or if its only got one bore left should I go with a hone and the vitos ported pistons and wait on the port til I get some fresh cyl? I also have a stock head so I was also thinking of a f.a.s.t. milled stock head. I had a cool head lined up to buy but now I can't get in contact with the member. Right now the mods I have are fattys,+4 timing,2into1 with a 33pwk. I like the 2into1 I mainly ride trails and spend maybe a day or two each year at a drag strip or mx track there's also no dunes in va. As the bike sits I can beat my brother's 2012 yfz450 with slip-on,intake mod and jetting.Can also beat my buddy's kfx450 with same mods. Only thing I haven't beat is my friends 250r dirtbike he has a fatty and better reeds. I just need some more power to continue betting these guys. I want to eventually go to a 421 serval but not any time soon. Thanks and sorry its long.