Yamaha YZ250X 2023 Owner's Manual
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ENGINE SPECIFICATIONS2-3Gear ratio1st 1.929 (27/14)2nd 1.533 (23/15)3rd 1.313 (21/16)4th 1.050 (21/20)5th 0.840 (21/25)Secondary reduction ratio 3.571 (50/14)Final drive ChainAir filterAir filter element Wet elementAir filter oil grade Yamaha foam air filter oil or other quality foamair filter oilCarburetorType quantity PWK38 1ID mark BRY1 00Main jet #178Main air jet #200Jet needle NYHW-2Needle jet 2.9(#6)Cutaway #7Pilot outlet 0.8Pilot jet #52Bypass 1 1.5Air screw turns out 1-1/8Valve seat size 3.8Starter jet 1 #85Power Jet #55Float height 6.5 mm (0.26 in)Throttle grip free play 3.0–5.0 mm (0.12–0.20 in) |
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