!st time on this forum, but have been on the Yamaha Road Star Warrior site for a couple of years. I need some help from any Elsinore guys out there. I have a 74 MT 250, just did the top end, bored one over with a single ring Wiesco piston. I have 150 lbs compression. I rebuilt the carb, which is a stock Keihin 28mm, I replaced the jets and needle. The slow jet is a #60, the main I have tried #120-#125. the needle is a D41, clip on the 3rd psotion down. when I start it up, fires up every time, purrs at an idle , when I start accelerating I get to about 4000 rpm, even tough to get there it flattens out, no power no revs. I have checked the points and the timing, they are spot on. My sons Yamaha PW80 will beat this legend of a bike. Any help, I would very much appreciate. Thanks
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