sstaton1983 Posted July 16, 2013 Report Share Posted July 16, 2013 I just picked up a 421 cub with 34 mikuni Tms carbs.I need new needles so while it was apart i checked the dump tubes.it has the Q2 .... i have read that i need a q0. I'm not real familiar with mikunies. Just wanting to see what's working for others with this carb. I'm running CPI in frames. Quote Link to comment Share on other sites More sharing options...
Finch Posted July 16, 2013 Report Share Posted July 16, 2013 id call Brandon at wildcard hes a pro with the tms Quote Link to comment Share on other sites More sharing options...
sstaton1983 Posted July 17, 2013 Author Report Share Posted July 17, 2013 Anybody run the q2 emulsion tubes? Quote Link to comment Share on other sites More sharing options...
dirtydownunder Posted July 21, 2013 Report Share Posted July 21, 2013 i ran the q2's but now run the q0's. midrange is better with the q0's stock needle is 5FP17 Quote Link to comment Share on other sites More sharing options...
fastbanshee8 Posted July 21, 2013 Report Share Posted July 21, 2013 Mine were pig rich with the Q2's, so I bought the Q0's, and it runs great now. Quote Link to comment Share on other sites More sharing options...
Wildcardracing Posted July 21, 2013 Report Share Posted July 21, 2013 Have you tried the bike yet? You will most likely want the Q0 tubes, but depending on your elevation and the cylinder you may get it right with the Q2's. If it has the original 5FP17 needles that is. Other needles will affect the midrange delivery. If you have the 5FP17's in there run them on the second leanest clip position with the Q-2's to start with. You may end up dropping the needle all of the way. PM me or give me a call if you need any advice. -Brandon Quote Link to comment Share on other sites More sharing options...
sstaton1983 Posted July 21, 2013 Author Report Share Posted July 21, 2013 Thanks for the info. It does have the 5fp17 needles. I'm going to try it with a good needle and see how it runs before switching to the q0 tubes. I thing I'm around 800 ft here in oklahoma. Quote Link to comment Share on other sites More sharing options...
Wildcardracing Posted July 22, 2013 Report Share Posted July 22, 2013 At that elevation, as long as the cylinder hasn't been chopped up so far to loose intake velocity you should be able to jet it with the Q2's. If you have any questions feel free to call. -Brandon (435)623-0148 Quote Link to comment Share on other sites More sharing options...
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