Single Exhaust-Excessive backfiring, stuttering, etc.
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Joined: Aug 2006
Posts: 155
From: in front of you
Single Exhaust-Excessive backfiring, stuttering, etc.
check my member's page at the bottom of this post to see the bike.
back to the questions.
i believe i may be rich still. I live where it's flat and low elevation. carbs are clean, and i synced the carbs with feeler gauges. my vacuum gauges weren't cutting it.
ok so idle has been fairly lean in the past since my exhaust conversion. i believe i am currently 2 turns out on the pilot screw. it still pops periodically on idle so i need to turn it out a little more. which leads me to my questions.
does the pilot jet control decel?
to what rpm does it control fuel?
when does the main jet kick in?
will backpressure or lack thereof impact idle and midrange and wot settings?
here are my problems. when they happen that is...
sporadic (sp?) popping at idle,
excessive popping at decel (pair is removed),
stuttering from wot to part throttle engagement,
feels like winding out but no power until 9k rpm sometimes,
after stepping down jets it seemed to do it less, but i am now foggy on that,
when all works well bike pulls real hard from 6k to redline,
outside temp doesn't seem to have much effect as it does it when it's 60* F and 20* F,
choke tests are inconclusive, but dont seem to help.
do i still have too much fuel?
what is shimming the carbs? will it help?
it seems i have midrange troubles.....help!!! please.
back to the questions.
i believe i may be rich still. I live where it's flat and low elevation. carbs are clean, and i synced the carbs with feeler gauges. my vacuum gauges weren't cutting it.
ok so idle has been fairly lean in the past since my exhaust conversion. i believe i am currently 2 turns out on the pilot screw. it still pops periodically on idle so i need to turn it out a little more. which leads me to my questions.
does the pilot jet control decel?
to what rpm does it control fuel?
when does the main jet kick in?
will backpressure or lack thereof impact idle and midrange and wot settings?
here are my problems. when they happen that is...
sporadic (sp?) popping at idle,
excessive popping at decel (pair is removed),
stuttering from wot to part throttle engagement,
feels like winding out but no power until 9k rpm sometimes,
after stepping down jets it seemed to do it less, but i am now foggy on that,
when all works well bike pulls real hard from 6k to redline,
outside temp doesn't seem to have much effect as it does it when it's 60* F and 20* F,
choke tests are inconclusive, but dont seem to help.
do i still have too much fuel?
what is shimming the carbs? will it help?
it seems i have midrange troubles.....help!!! please.
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Superstock
Joined: Sep 2006
Posts: 308
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Squid
Joined: Jun 2006
Posts: 56
From: Sunny California
I can't help you with the tuning problems but dude.... that exhaust is BAD ***! Where'd you get it, how'd you do it and where can I get my can in black?? G'luck with tuning.
~Brian
*edit* Never mind, I read your profile about pipe type. I'm still curious about mounting etc though.
~Brian
*edit* Never mind, I read your profile about pipe type. I'm still curious about mounting etc though.
Thread Starter
Senior Member
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Joined: Aug 2006
Posts: 155
From: in front of you
got the can from yamaha. got the bends from autozone. welded myself. black-well i've seen carbon ones. look on ebay. be careful tho, its loud as hell, and im not sure if it has helped performance significantly. i mostly did it to save weight.
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Superstock
Joined: Oct 2006
Posts: 277
Thread Starter
Senior Member
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Joined: Aug 2006
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From: in front of you
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Joined: Dec 2006
Posts: 104
From: LaFayette, Ga
Yeah thats a really clean chicken. just up in the air on the can. I know that it save alot of weight. But i really love the look of high mount cans on the bike, but really looks good man. I know its really loud, would love to here it run 
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World Champion
Joined: Dec 2004
Posts: 105,287
From: Fulton, MO
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World Champion
Joined: Dec 2004
Posts: 105,287
From: Fulton, MO
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