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#1 |
![]() Join Date: Apr 2012
Location: burlington n.c.
Posts: 6
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Hello its been awhile since i needed help but im stumped. So i have a sunl vip and i just put a kei hin carb on it right from the start i had to give a little gas to start. So i took the idle jet from my stock carb and put it in no luck. Plus when i come to a stop it stales out or the idle will be at 3k one minute and 2k the next. The a/f screw is three turns out and the main jet is a 79 . The stock was a 78. I also am having a bogging when i give it gas from a roll or from a stop. So any ideas or something im missing. I always wondered why i hate messing with carbs. Thanks
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#2 |
![]() Join Date: Oct 2012
Location: Germany
Posts: 140
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Drop the needle (raise needle clip 1 or 2 positions) and adjust idle screw on a hot motor.
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50cc 139QMB, 7g sliders, manual petcock w/ transparent lines, Naraku CDI, Naraku belt, high output racing coil, 18.4mm CVK clone w/ #85 mj and #38 idle, needle @ leanest, OEM pipe mod, Kenda tires, NGK Iridium, lots of LED mods, 2.61L/100km (90 MPG) |
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#4 |
![]() Join Date: Apr 2012
Location: burlington n.c.
Posts: 6
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So i should drop the needle to decrease the fuel flow with the needle
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#5 |
![]() Join Date: Oct 2012
Location: Germany
Posts: 140
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Yeah, put air/fuel screw at 2.5 turns out and drop the needle. Then make fine adjustments with the a/f screw on a hot engine till you get the desired result.
__________________
50cc 139QMB, 7g sliders, manual petcock w/ transparent lines, Naraku CDI, Naraku belt, high output racing coil, 18.4mm CVK clone w/ #85 mj and #38 idle, needle @ leanest, OEM pipe mod, Kenda tires, NGK Iridium, lots of LED mods, 2.61L/100km (90 MPG) |
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#6 |
![]() Join Date: Apr 2011
Location: NY
Posts: 992
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Here's a good diagram to refer to:
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#7 |
![]() Join Date: Aug 2012
Location: Muskegon, MI
Posts: 97
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I too am fiddling with a new carb. Boggs from a stop. Everything else is fine. I'm just gunna rejet and maybe play with needle
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