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 Mikuni tuning question  
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Post Mikuni tuning question
I've got a 38 mikuni on my 23 mini. I've been getting some backfire and so I've been playing with it. Long story short I'm not good with carbs and I think I may have done more harm than good.

I've got my needle set on the middle notch, and I was told to run the top adjustment all the way down till basically the needle touches the main jet and then back it off 2 turns. So I did, and my fuel air mixture screw I took all the way in and backed off 1.5 turns. Still running like hell.

What have I done wrong???
20160228_153728.jpg20160228_153716.jpg

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Stage 2 Mini 23 chasing a 1642 Prodigy


Sun Feb 28, 2016 2:42 pm
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Post Re: Mikuni tuning question
Is backfire your only problem now? Check for exhaust leaks, gaskets in good shape?

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Sun Feb 28, 2016 3:02 pm
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Post Re: Mikuni tuning question

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Stage 2 Mini 23 chasing a 1642 Prodigy


Sun Feb 28, 2016 3:09 pm
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Post Re: Mikuni tuning question
Did you run it today? Did the coils help? What kind of rpm were you turning?

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Sun Feb 28, 2016 3:11 pm
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Post Re: Mikuni tuning question
Never got to really stretch it out with all the carb tuning

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Stage 2 Mini 23 chasing a 1642 Prodigy


Sun Feb 28, 2016 3:17 pm
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Post Re: Mikuni tuning question

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Stage 2 Mini 23 chasing a 1642 Prodigy


Sun Feb 28, 2016 5:12 pm
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Post Re: Mikuni tuning question
Well that'll do it lol

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Sun Feb 28, 2016 10:51 pm
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Post Re: Mikuni tuning question
I think between my exhaust leak and the main jet getting loose was my issue.

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Stage 2 Mini 23 chasing a 1642 Prodigy


Mon Feb 29, 2016 6:34 am
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Post Re: Mikuni tuning question
I say the exhaust leak was definitely causing backfire. Not sure about the main jet till near WOT.

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Mon Feb 29, 2016 6:43 am
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