421 cub

[VictorK]

I was helping my buddy tune his cub today and while it's going pretty good it seems the bottom end is still flat. I understand it's a 421 shee and it's power isn't low but it still seems off. 421with race fuel domes, 35 pwks, k&n's no Air box, +4 timing, t5s, 162 main, 52 pilot and middle clip with air screws 1.5 out. Were about 700ft asl and it was 80 degrees today.

[Surfrjag]

check over the electrical system and a new set of plugs. might even add a little timing? whats the question?

[VictorK]

check over the electrical system and a new set of plugs. might even add a little timing? whats the question?

I just threw the mods out there as it has to do with jetting but I know there's more than a couple cub guys on here who could comment on the jetting.

[vulvafan537240]

I have the same setup except pump domes and shearer inflames and hope to get it running this weekend. I was told 55 on the pilot.

[Surfrjag]

sorry i should have read the title... just curious what needles your running though

[SandmanPNW]

I have the same setup except pump domes and shearer inflames

 

[vulvafan537240]

 

 

Hey man. It happens when I forget to use my creme okay?

 

Gotta love autocorrect.

[VictorK]

Hey man. It happens when I forget to use my creme okay?

 

Gotta love autocorrect.

Haha

[mike0chek]

i run 165 mains and 52 pilots on my 421, mods are below

[vulvafan537240]

i run 165 mains and 52 pilots on my 421, mods are below

 

What's your elevation?

[sleeper06]

48 pilot ,cel needle fourth clip main should be real close,the dgh that comes in the 35s are in somecases too rich