kcraptor Posted March 7, 2005 Report Posted March 7, 2005 I just won an auction on ebay for a ModQuad cool head with 20cc domes, my bike is almost stock it has DMC pipes on it thats about it I will be riding here in kansas and waynoka ok. will 20cc domes be ok or do I need to go with something like a 21cc dome.Also do I have to rejet for the head .I'm wanting to stay away from race fuel.I believe I'm around 1000 to 1300 ft above sea level. Quote
Banshee_LE Posted March 7, 2005 Report Posted March 7, 2005 I just won an auction on ebay for a ModQuad cool head with 20cc domes, my bike is almost stock it has DMC pipes on it thats about it I will be riding here in kansas and waynoka ok. will 20cc domes be ok or do I need to go with something like a 21cc dome.Also do I have to rejet for the head .I'm wanting to stay away from race fuel.I believe I'm around 1000 to 1300 ft above sea level. 334848[/snapback] I think you should use 21cc domes, and you shouldn't rejet but you should check you spark plugs! Quote
frocashmoney24 Posted March 7, 2005 Report Posted March 7, 2005 you dont have to jet with a head, but its always safe to check, i would also switch to 21 cc domes and run 93 oc gas, better safe then sorry, im sure someone on the site might switch, i know someone on here is sellin a 21cc pair in the for sale right now. Quote
Ducman Posted March 7, 2005 Report Posted March 7, 2005 20cc domes are at the limits of the compression you can run on pump gas, but I have heard of people in the HQ running 20cc domes with +4 timing on pump fuel at sea level. If you make sure that you are not lean, because detonation is a product of compression and lean air fuel ratio, and stay with stock ignition timing, you should be fine. Possibly even +4 timing since you are 1300 ft. 21cc domes would be completely safe, but I think you can get away with 20cc domes. Quote
ellison445 Posted March 8, 2005 Report Posted March 8, 2005 20cc you would have to run race gas!!! go with 21 CC 20cc domes are at the limits of the compression you can run on pump gas, but I have heard of people in the HQ running 20cc domes with +4 timing on pump fuel at sea level. If you make sure that you are not lean, because detonation is a product of compression and lean air fuel ratio, and stay with stock ignition timing, you should be fine. Possibly even +4 timing since you are 1300 ft. 21cc domes would be completely safe, but I think you can get away with 20cc domes. 335052[/snapback] Quote
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