midlifecrisis Posted March 3, 2010 Report Posted March 3, 2010 I have been reading for the past 2-3 weeks about heads and domes etc.... and I wonder what the difference is? Am I to understand from what Ive read that with the larger domes it makes it safer to run pump gas, why is that? What size domes are stock? Whats with the cool heads, why are they better than stock, are they worth it? Sorry about all the questions, but Ive gotta get it straight! Quote
midlifecrisis Posted March 3, 2010 Author Report Posted March 3, 2010 I have been reading for the past 2-3 weeks about heads and domes etc.... and I wonder what the difference is? Am I to understand from what Ive read that with the larger domes it makes it safer to run pump gas, why is that? What size domes are stock? Whats with the cool heads, why are they better than stock, are they worth it? Sorry about all the questions, but Ive gotta get it straight! Heres the reason Im asking, as Im looking for a set of cylinders for my bike. This is a quote from a guy who has responded to me "hey there yup i got a set of 1 over signed trail mx /port withbbooste ports comes with piston ring bearings rings yup oull need head bolts and gaskets i do have a stock head ill throw in for a couple bucks i got these to use went t disasseble my jugg on my bike to realize the were allready ported so jus looking to get some money back guy i got them from ran 17 cc domes and said it had 175 psi aside at breakdown. with stock head or big domes u can run 93 anyway here some pics lmk thanks" Theres a lot of stuff in there that I dont understand, can someone help me out? Quote
firebanshee Posted March 3, 2010 Report Posted March 3, 2010 I have been reading for the past 2-3 weeks about heads and domes etc.... and I wonder what the difference is? Am I to understand from what Ive read that with the larger domes it makes it safer to run pump gas, why is that? What size domes are stock? Whats with the cool heads, why are they better than stock, are they worth it? Sorry about all the questions, but Ive gotta get it straight! Larger domes lower your compression, that is why it makes it safer to run pump gas. 24cc is stock. Cool heads have interchangeable domes so you can change your compression, and they help your motor run cooler. Yes they are worth it. you can take of your head and change domes and reuse the orings if they still look good. Quote
firebanshee Posted March 3, 2010 Report Posted March 3, 2010 Heres the reason Im asking, as Im looking for a set of cylinders for my bike. This is a quote from a guy who has responded to me "hey there yup i got a set of 1 over signed trail mx /port withbbooste ports comes with piston ring bearings rings yup oull need head bolts and gaskets i do have a stock head ill throw in for a couple bucks i got these to use went t disasseble my jugg on my bike to realize the were allready ported so jus looking to get some money back guy i got them from ran 17 cc domes and said it had 175 psi aside at breakdown. with stock head or big domes u can run 93 anyway here some pics lmk thanks" Theres a lot of stuff in there that I dont understand, can someone help me out? You could get 21cc domes and run 93 octane. What is your elevation it makes a BIG difference. Quote
midlifecrisis Posted March 3, 2010 Author Report Posted March 3, 2010 You could get 21cc domes and run 93 octane. What is your elevation it makes a BIG difference. As far as I know, we are at about 200 feet ASL (Great Lakes area) Quote
firebanshee Posted March 3, 2010 Report Posted March 3, 2010 As far as I know, we are at about 200 feet ASL (Great Lakes area) You would be good with 21cc and +4 timing on 93 octane. Quote
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