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Just for info.i went with 15/20 valve clearance with std cam and carb 0.9 a/c 120 main jet 100 first stage 140 second stage.
Until 1.8-1.9 bar afr was 11.9 above that @2.2 went allmost 13 afr and i switched main jet to 125 and had at 6.4rpm 12.2afr
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