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08-05-2007 06:47 PM  13 years ago
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BJames111

rrElite Veteran

San Diego, California

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idle transition
Since I've moved here to billings, I have been having tuning issues with my ys91ST4. After it's spooled up it's fine, but it really struggles to get up to speed. So when It's idling and I increase the throttle it nearly (and sometimes does)die. Is this an idle screw or a mid needle issue?
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08-05-2007 08:21 PM  13 years ago
tad727

rrNovice

Merritt Island Florida USA

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You have moved into thinner air. So the mixture needs to be leaned out. Use the hover needle, or mid needle to smooth out the transition. Be careful as this needle effects the high and idle needle settings.What's it doing now? Oh it's doing that again!
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08-06-2007 01:10 AM  13 years ago
airdodger

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Johnston USA

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Try leaning the idle needle.Chris
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