flyn_10 Posted April 4, 2012 Report Share Posted April 4, 2012 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 Quote Link to comment Share on other sites More sharing options...
steve14733 Posted April 4, 2012 Report Share Posted April 4, 2012 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, Quote Link to comment Share on other sites More sharing options...
bikerjon Posted April 4, 2012 Report Share Posted April 4, 2012 it also depends on your elevation. im at 5500' and i can run 18cc domes on pump gas. Quote Link to comment Share on other sites More sharing options...
Trueblown Posted April 4, 2012 Report Share Posted April 4, 2012 High elevation your set. If you are close to see level then run race gas or Atleast 50/50 mix of 110 and 93 Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted April 4, 2012 Report Share Posted April 4, 2012 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. Quote Link to comment Share on other sites More sharing options...
flyn_10 Posted April 4, 2012 Author Report Share Posted April 4, 2012 It has cpi inframe pipes good clean up on ports 39mm carbs on race gas Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted April 4, 2012 Report Share Posted April 4, 2012 Thats probably a good combo then IMO. Quote Link to comment Share on other sites More sharing options...
Trueblown Posted April 4, 2012 Report Share Posted April 4, 2012 How much timing do you run? Quote Link to comment Share on other sites More sharing options...
flyn_10 Posted April 4, 2012 Author Report Share Posted April 4, 2012 Right now its a 5deg Quote Link to comment Share on other sites More sharing options...
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