Wadester555 Posted July 17, 2015 Report Posted July 17, 2015 I'm going to have the cool head, stock carbs 320 mains and 27.5 pilots unless I can run 25, cpi in frames, +4 timing, k&n pods with outerwears. Would 21cc run good Quote
Wadester555 Posted July 17, 2015 Author Report Posted July 17, 2015 4mil? What fuel? What elevation? Fuel is 91, 92 or 93 octane, 32:1 fuel mixture. And I only ride at ls ok. So 900 Quote
99michael Posted July 17, 2015 Report Posted July 17, 2015 Isn't LS oklahoma 1400ft ish? Sent from my iPhone using Tapatalk Quote
Wadester555 Posted July 17, 2015 Author Report Posted July 17, 2015 I heard its 900-1400 and stock. Not ported Quote
Surfrjag Posted July 17, 2015 Report Posted July 17, 2015 Id go with a 21cc dome unless you gwt it ported then a 20cc Keep in mind your crank would be better off if it was trued and welded if you plan on putting more stress on it. Quote
Wadester555 Posted July 17, 2015 Author Report Posted July 17, 2015 Next winter I'm doing a rebuild but just want something for this summer and next Quote
tfaith08 Posted July 20, 2015 Report Posted July 20, 2015 I'm at 151psi with 21cc domes at 146'ASL on 93. I'm on +4 timing and have no pitting either. I'd believe that you'd be alright with 21s anywhere. Quote
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