Jump to content

Recommended Posts

Posted

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.

Posted

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

Posted

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.

Posted

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

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...