Valadezj Posted March 26, 2013 Report Share Posted March 26, 2013 I have a ported 421 cub , 20cc domes, cpi inframes , currently running 35mm airstrikers , is it worth the money and time to switch to 39mm pwks. i know i would need bigger boots and probably filters. basically would i notice the difference in power, or would it just make a difference on the dyno Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted March 26, 2013 Report Share Posted March 26, 2013 You probably wouldnt notice it by the seat of the pants. Would probably be 3 or 4hp stronger with 39s. Quote Link to comment Share on other sites More sharing options...
Nieskes Posted March 26, 2013 Report Share Posted March 26, 2013 39s Quote Link to comment Share on other sites More sharing options...
5150banshee Posted March 26, 2013 Report Share Posted March 26, 2013 I run 39's on my 400 and love it... I could tell when I went from 35's-39's Sent using Tapatalk Quote Link to comment Share on other sites More sharing options...
Valadezj Posted March 27, 2013 Author Report Share Posted March 27, 2013 Thanks guys Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted March 27, 2013 Report Share Posted March 27, 2013 You will def notice a difference, I run 39s on a variety of machines and if your porting and supporting mods are up to par then you will be satisfied I have noticed gains all over Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted March 27, 2013 Report Share Posted March 27, 2013 Going to the 39's will get you a tad more on the top end, but at the cost of a little bit of bottom end. Are you running it wide open in the dunes and drag racing or do you ride the stuff out west that gets a bit tighter. Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted March 27, 2013 Report Share Posted March 27, 2013 What kind of riding? Quote Link to comment Share on other sites More sharing options...
Valadezj Posted March 27, 2013 Author Report Share Posted March 27, 2013 I do 60% dune and 40 drag, my question is bang for the buck is it worth buying new intakes and bigger filters plus cost of carbs for 3 more hp Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted March 27, 2013 Report Share Posted March 27, 2013 That's your decision.... Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted March 27, 2013 Report Share Posted March 27, 2013 I do 60% dune and 40 drag, my question is bang for the buck is it worth buying new intakes and bigger filters plus cost of carbs for 3 more hp I'd leave it. Quote Link to comment Share on other sites More sharing options...
252wheelieking Posted March 27, 2013 Report Share Posted March 27, 2013 This thread has helped me alot...Thanks fella's im sticky with my 35 PWK's. Quote Link to comment Share on other sites More sharing options...
possum Posted March 27, 2013 Report Share Posted March 27, 2013 id leave it as well. Quote Link to comment Share on other sites More sharing options...
Valadezj Posted March 27, 2013 Author Report Share Posted March 27, 2013 thanks for the help il stick with the 35s Quote Link to comment Share on other sites More sharing options...
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