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Old 09-21-2017, 11:22 AM
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Moto Yfz450 methanol/ethanol jetting numbers

Currently made the switch to 100% ethanol and put fbh needle on clip #5 running 280 main jet 80 pilot starter jet 150 and 2.5 turns out on air/fuel screw mods are +3mm cylinder wr450 crank stage 3 cams 13.5:1 high compression piston ti valves fci intake has bill balance exhaust runs really good just has a small hiccup in mid rang and it'll rev quick and rev all the way out to rev limiter sometimes a backfire and a flame out exhaust.... I think it's a lil Lean still anybody got any advice I would much appreciate it
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