wow,thanks bansh-eman i just bought this bike a couple weeks ago it did have stock pipes, the guy said it was worked up with a fresh rebuild only 5 tanks ran through it. the thing was a problem from day 1, day 3 it blew up , i did a comp. check left side had 130psi right side had 30psi, i took it apart the right side was fucked. i ran the numbers on the wiseco pistons it a 66mm bore, i believe it said .080 over. i just bought some dune/trail ported cyls. and new vitos power pistons off ebay, the seller says they are bored.040. also picked up fmf fattys for the new build, has stock carbs but not sure about coil, or stator ill have to check. i think im going back to a stock cdi so this motor dont melt down again. what do u think? any help is greatly appreciated this is my 2nd shee and i love them, just want a good runner should i ditch this ignition? also any recomendations for jetting with the ported cyl. and fattys thanks