ENGINE SPECIFICATIONS2-35th 1.200 (24/20)6th 1.095 (23/21)Secondary reduction ratio 3.692 (48/13)Final drive ChainAir filterAir filter element Wet elementAir filter oil grade Yamaha foam air filter oil or other quality foamair filter oilCarburetorType quantity TMXx38 1ID mark 1C37 51Main jet #430Main air jet 2.5Jet needle 6BFY43-74-3Needle jet S-1Cutaway 4Pilot outlet 0.7Pilot jet #40Bypass 1 0.7Bypass 2 0.7Air screw turns out 2-1/4Valve seat size 3.8Starter jet 1 #80Fuel level (using fuel level gauge) 9.5–10.5 mm (0.37–0.41 in)Throttle grip free play 3.0–5.0 mm (0.12–0.20 in)