changed domes

[flyn_10]

Ok guys help out please I changed domes on my 421 cub form at set of 21cc to 19cc and was told I screwed up by putting the 19cc in they told me I was going to lose horse power and torque its on gas

[steve14733]

Ok guys help out please I changed domes on my 421 cub form at set of 21cc to 19cc and was told I screwed up by putting the 19cc in they told me I was going to lose horse power and torque its on gas

if your running race gas you will gain,

[bikerjon]

it also depends on your elevation. im at 5500' and i can run 18cc domes on pump gas.

[Trueblown]

High elevation your set. If you are close to see level then run race gas or Atleast 50/50 mix of 110 and 93

[RadarRacing]

Whoever told you that would need more info than you have given us before saying that.

 

Could it be possible that one certain motor lost hp with a particular 19cc dome..Yes. Depending on the pipe, squish, porting etc a 19 may be better than the 21.

[flyn_10]

It has cpi inframe pipes good clean up on ports 39mm carbs on race gas

[RadarRacing]

Thats probably a good combo then IMO.

[Trueblown]

How much timing do you run?

[flyn_10]

Right now its a 5deg