YFZ 450 issue
#13
YFZ 450 issue
Originally posted by: sandplayaz
Since the filter on the bike is stock and I live in the Desert if figured best to leave it on till i get my K&N pro flow.
Since the filter on the bike is stock and I live in the Desert if figured best to leave it on till i get my K&N pro flow.
If you leave the lid on, you are leaving horsepower on the table, as the airbox is one of the reasons why the YFZ is so restricted for air.
If you remove the lid, I'd go with a
45 pilot
Stock needle on the 5th to 6th clip position, or YZ needle on the 4th clip position
170-175 main
And adjust the fuel screw till it revvs clean from idle.
If you still insist on leaving the lid on, you will need to jet it a little leaner because you are starving the motor of air.
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WesTech
Polaris Ask an Expert! In fond memory of Old Polaris Tech.
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08-11-2015 07:55 AM
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