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DUCKSBANE
MMT Pro Member
Joined: Mon Feb 23, 2009 8:13 pm Posts: 121
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 Mikuni question (another)
My motor is close to where I want it but it bogs down if I let it idle then it stalls(worse when the temp is down below 30). To start after idling I have to rev the motor in neutral then engage the clutch or it will stall out every time unless I set the idle above 1800.
What would you guys suggest, Change out the idle jet? Change the needle jet setting? Also which way? I assume I am getting to much fuel at idle.
Thanks, oh and its a EVT stage1 motor.
_________________ 1860 Phowler Extreme W/ stage 1 36 PD
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Thu Feb 18, 2010 5:59 am |
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drake1
MMT Addict
Joined: Wed Jan 14, 2009 6:57 am Posts: 659
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 Re: Mikuni question (another)
Could be water in the fuel, could adjust the brass enrichment screw to add more fuel or bump up the size of the pilot jet. Try pulling out the choke one click and taking off and see what happens. Another way to check to see if it is starving for fuel is to pump the throttle a couple of times when you are trying to go and see if she takes off. Pumping the throttle is pumping the accelerator pump.
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Thu Feb 18, 2010 6:49 am |
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DUCKSBANE
MMT Pro Member
Joined: Mon Feb 23, 2009 8:13 pm Posts: 121
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 Re: Mikuni question (another)
Dont think it is water, its been doing this the entire season. If I turn the enrichment screw out more than 1 turn she runs like shit. When the motor is choked it runs better, but the RPMS are of course higher.
Once she is in gear without stalling(ie I have throttle the rpms up while in neurtral just before ingaging the clutch) she runs great from bottom to top.
_________________ 1860 Phowler Extreme W/ stage 1 36 PD
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Thu Feb 18, 2010 12:06 pm |
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stumpgrinder
MMT 1000 Club
Joined: Thu Jan 15, 2009 1:04 pm Posts: 1438
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 Re: Mikuni question (another)
check for air intrusion somewhere.... if you have un-metered air entering the system after the carb it will show symptoms like you've explained. just went through da same thing.
With the engine idling as best as it can... spray some carb cleaner or sumthin around the carb boot and intake gaskets to make sure you don't have a leak pulling air in somewhere.
_________________ I'm your Huckleberry......... http://www.youtube.com/watch?v=XqVe3xG-wos
I am proud to be an American, I am glad that I am free... but right now I wish I was a dog, and Obama was a tree.
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Fri Feb 19, 2010 10:52 am |
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Rail
MMT Pro Member
Joined: Tue Jan 13, 2009 9:26 pm Posts: 302
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 Re: Mikuni question (another)
I had the same problem with mine but rather than increasing the idle jet size I went down one size and it rectified the situation..
_________________ "I just want silence. Jesus, it doesn't mean I don't like you. It just means right now, I like silence more."
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Fri Feb 19, 2010 12:18 pm |
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DUCKSBANE
MMT Pro Member
Joined: Mon Feb 23, 2009 8:13 pm Posts: 121
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 Re: Mikuni question (another)
_________________ 1860 Phowler Extreme W/ stage 1 36 PD
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Fri Feb 19, 2010 2:50 pm |
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DUCKSBANE
MMT Pro Member
Joined: Mon Feb 23, 2009 8:13 pm Posts: 121
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 Re: Mikuni question (another)
_________________ 1860 Phowler Extreme W/ stage 1 36 PD
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Fri Feb 19, 2010 2:51 pm |
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DUCKSBANE
MMT Pro Member
Joined: Mon Feb 23, 2009 8:13 pm Posts: 121
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 Re: Mikuni question (another)
Moved the needle jet clip from 2 notches bellow the center notch to 1 notch above the center and it is running much better. May move it up one more notch or just get a smaller idle jet.
_________________ 1860 Phowler Extreme W/ stage 1 36 PD
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Mon Feb 22, 2010 7:30 am |
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