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backfire through carb

3230 Views 18 Replies 5 Participants Last post by  CUZMOTEEFOOSWA
i did the scar mod and pair removal. I have no vacuum leaks and I followed all directions with adding three washers. I'm running a velocity stack and open exhaust.The plugs look perfect according to the picture chart. The more I turn the a/f screw out to richin it up, the worse it gets.It idles and starts perfect but as soon as you put a load on it the carb starts popping.I'm at the end of my rope.
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V Stack

Well, here's what I would do---if it runs good and the plugs indicate you're A/F is correct, keep an eye on your plugs. If the continue to look good over the next tankful or so and it's running the way you want it--I'd leave it alone. Any pics of your set-up? That would give me/us a better idea and ballpark estimate of what type of air your pulling. If it starts to indicate lean on your plug checks, then you'll want to look into moving up in jet size.
It's hard for me to see the bike running rich with a 195 and a V-Stack. What type of V-Stack are you running?? Any pics ?? Wow, I run a 203 with a standard Hyper no problem. Maybe we are looking at the wrong spot. :hmm2: :hmm2: GG :D
I see It

Actually, if you go to the 1300 gallery, it's the white C model.
Well I see it. Good looking ride!! Are you sure the bike still has the stock 195 main in there? Spring Cut? Pilot Size? What kind of filter material are you putting over it? How do the plugs look after a 100 mi. ride?? Man I can't belive it would run at all sucking all that air with a 195. 55. GG :D
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