73 Yamaha DT 250 discussion forum:

1973 DT 3 tuning

1973 DT 3 tuning

Phil said 2003-10-30 21:22

Working on a Yamaha 1973 DT3 250. Starts great and runs strong on up to about 6,000, at which point it gets the blahs. Plug looks sooty (rich). Tried stock (160) main, lowered needle, lowered float (level), played with the timing. It´s starting to drive me nuts. Anybody got any tips or clues? Thanks,
Phil

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