Yamaha Discussions about Yamaha ATVs.

what main jet to run?

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Old Jan 31, 2005 | 11:54 PM
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Speedy2222's Avatar
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Default what main jet to run?

how many turns on the air/fuel screw and how big of a main jet? im gonna b running a UNI filter and HMF slipon
 
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Old Feb 1, 2005 | 06:12 AM
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Default what main jet to run?

bump up 3 on the main and do a plug chop,you may have to adjust from there. To adjust the fuel screw get the bike up to temp, and then start turning it out until you get the best idle (highest), and leave it there, go past until it starts to run like crap, come back 1/2 turn and leave it there.
 
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