Jetting new 4 mil...advice

[12 0 Clock P I M P]

Got it all together now what jets to start safely....

 

64.5mm short rod four mill.......cut stock head..... drag ported by wildcard......34MM mikunis set up for 50/50 mix...boysen carbon fiber reeds with spacer.....500 ft above sea level....

 

For now...FMF gnarlys.......with PC 2's

 

saving for a set of in frames

[bansheesrtoys]

when i did mine i didn't have to change the jets,but i think it was a bit rich in the first place. so maybe try 2 jets bigger than what u have now and jet down from their. i have a +4 short rod with 19cc domes v3 and .20 over , stock ports and stock carbs 32:1 100 race gas.toomey 2 into 1 air filter with k&n. so i'm pretty close to what you have and it was orginal jetted for stock crank .20 v3 19cc domes and toomey 2 into 1 filter with the k&n 32:1 on 93 pump gas. but like i said it seemed to rich but know it ripps

[sleeper06]

175 main 52 pilot.Might end up around 168-170 depending on porting.Safe start tho.Listen to her on top a rich break up and a lean stumble can feel similar sometimes.Do you know your durations?

[12 0 Clock P I M P]

175 main 52 pilot.Might end up around 168-170 depending on porting.Safe start tho.Listen to her on top a rich break up and a lean stumble can feel similar sometimes.Do you know your durations?

 

 

I dont know the durations....The carbs have 220 mains in them now....I have yet to get the intake boots.... i need the angled ones now.....

 

I gotta check to see where the pilots are at.....thanks for the info.......its my first 4 mil build with using bigger carbs so...

[06specialedition]

If Brandon set up your motor, Hit him up...He'll get you almost exactly where you need to be on jetting.