I just finished rebuilding the top end, have a pro design coolhead with 20cc domes, I have removed all the roughness from casting in the intake and exhaust ports, v force 2 reeds, fmf fatty exhaust, stock 26mm carbs with 270 main jets, k&n filter and no air box lid. Im riding in south jersey at about sea level and it was near 50 degrees yesterday. I have loss of power from 3/4 to full throttle. My low end is pretty responsive, mid range could be a bit better and top end it just dies and backfires.
Before the top end was rebuilt i had a stock head, fmf reeds, and stock intake and exhaust ports running 260 main jets and it ran good. I bought a dyon jet kit it comes with new needle jets, 270, 280, and 340 main jets. I also have a set of keihin 34mm pjs.....i took them off awhile ago b/c i couldnt get my quad to run right with them and went back to stock carbs. So anyway any help, tips or suggestion to get it running to full potential would be great. thankyou