kelly86 Posted July 14, 2014 Report Share Posted July 14, 2014 What would be the biggest size carbs to run on a stock crank with a drag port job on stock cylinders? Sent from my LG-MS840 using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
Cadmium5 Posted July 15, 2014 Report Share Posted July 15, 2014 Weld ur crank, jet stock carbs. Jetting is everything! Quote Link to comment Share on other sites More sharing options...
CottonBranchRacing Posted July 15, 2014 Report Share Posted July 15, 2014 34's run really well on stock bore with a little exhaust timing CottonBranchRacing Quote Link to comment Share on other sites More sharing options...
kelly86 Posted July 15, 2014 Author Report Share Posted July 15, 2014 Thanks guys.I had someone else tell me to get 34's but i got a friend that got a set of 40's that came off his cub and i was wondering could i use those Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted July 15, 2014 Report Share Posted July 15, 2014 You can run 39s or 40s with a drag ported 350 with high rpm pipes. If you were dragging only they will work fine. If you are riding off and on the throttle or duning, trail riding etc then a smaler carb will be snappier and more fun to ride. 33-35mm carbs would be a bit better. Bigger carbs DO make a couple more HP on a built high rpm 350. Hope this helps. Quote Link to comment Share on other sites More sharing options...
Nightmare Posted July 15, 2014 Report Share Posted July 15, 2014 I ran 39's on my drag ported 350, did well I guess. Sent from my XT1080 using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted July 15, 2014 Report Share Posted July 15, 2014 The bigger carbs will be drag only. If you plan on play riding as well, do 34's or 35's. Even on a full drag set up gearing and tire will be super important if you choose the 39/41 carbs. They won't be forgiving at all. 1 Quote Link to comment Share on other sites More sharing options...
kelly86 Posted July 16, 2014 Author Report Share Posted July 16, 2014 Thanks guys. we do a lot of drag racing where i live but we also do a lot of just riding around playing thru the neighborhood so i guess i'll go with sone 34's or 35's. this thread was very helpful Quote Link to comment Share on other sites More sharing options...
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