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FUEL SYSTEM / CARBURETION
EFFECT
THROTTLE OPENING - TYPICAL MIKUNI VM
Throttle Valve Cut-Away
Jet Needle/Needle Jet
Polaris TM-38 / TM 40 Mikuni component effect versus throttle opening chart.
needle valve
main jet
Main
jet needle
needle jet
throttle valve
bypass
pilot outlet
Slow
air jet
choke plunger
100 %
starter jet
100 %
Start
fuel screw
0
start
idle
1/4
1/2
3/4
Full
Throttle Position
4.19
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Troubleshooting
