Mikuni 38mm on a 400

[Knute]

Hey Guys,

I just wondered what the latest jetting specs are for a 38mm Mikuni on a 400.  We're in the process of changing over from the Bing and could use a good baseline.

Thanks!
Kent

[Merlin]

Hi Kent, I'll take a swipe at his off the top of my head, I hope it  gets you going (close).
*Pilot #45 or 50
*Slide 2.0 or 2.5
*Needle jet 166 P6
*Slide needle 6dh3 or 6FJ6
*Air correction 2.5
*Float seat 3.0 3.5 3.8  BIGGER is better on this one!
 I hope you are going to use race gas, I based this "guess" on that, if you run pump go with the listed stuff but please be careful.

Hope this works, good luck!

Quote: Thomas Jefferson, We are all born ignorant, some work to remain that way.
 Quote:Merlin, "it is impossible to teach those that wish not to be taught".

[Knute]

Hi Merlin,

Thank you very much for the input.  Of course we waited 'til the week of Mid-Ohio to make the swap!

Thanks again,
Kent

[Merlin]

Kent! I forgot the main jet, 320 long hex should be close.

 Good luck at the races.

Quote: Thomas Jefferson, We are all born ignorant, some work to remain that way.
 Quote:Merlin, "it is impossible to teach those that wish not to be taught".