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i have rebuilt a B31 engine using ian's convertion kit boring it out to 400cc with goldstar touring cams i have checked mag and valve timings 4 times seem set right new carb but all i can get it to do is fire a couple of time or spit back through the carb i am stuck does anybody know what the problem might be or someone in the kent area that has the knowledge to fix it thanks roger 
email (option): roger.beck@node6.com