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CaptainKnobby

Fuel mixture screw question

8 posts in this topic

When the tempature gets in the 80's and 90's outside when riding do you need to turn the fuel screw in to richen it in these type of temps or do you need to turn it out to lean the mixture at these temps.:thumbsup:

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I thought that turning the screw in closes up the fuel passage thus making it run leaner (less gas)?

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turn it in to lean it. turn it out to richen it.

turn it in with higher temps as there is less 'air in the air' (it is less dense)

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turn it in to lean it. turn it out to richen it.

turn it in with higher temps as there is less 'air in the air' (it is less dense)

Yep. It's a fuel metering screw, not an air metering screw. And increases in temp has the same effect as increases in altitude.

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Blingy fuel screw is a waste of time and money. Just fatten up the pilot jet a tad, set the screw to 1.75 turns out, and just ride the dam bike. After my rejet, I have ridden in temps of 50F all the way up to 80, and my bike runs great with no screw tweaking.

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Blingy fuel screw is a waste of time and money. Just fatten up the pilot jet a tad, set the screw to 1.75 turns out, and just ride the dam bike. After my rejet, I have ridden in temps of 50F all the way up to 80, and my bike runs great with no screw tweaking.

first I have heard of this....I guarantee you this does not work in my geo.......to much humidity and temp changes....

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Blingy fuel screw is a waste of time and money. Just fatten up the pilot jet a tad, set the screw to 1.75 turns out, and just ride the dam bike. After my rejet, I have ridden in temps of 50F all the way up to 80, and my bike runs great with no screw tweaking.
I beefed up the pilot to a 48 but I have been riding my 06 with 2 1/8 turns out on the screw so when I go to the track saturday I will experiment at 1 1/2 turns out cause its suppose to be in the upper 80's this weekend here.:thumbsup:

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