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Old 05-17-2004, 05:14 PM
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Default phat head racing cylinder head

     

I ordered a phat head racing cylinder head today, and should have it by friday. Hopefully i will get it and be able to try it out this weekend. And i sure hope it will be money worth spent, which was money from graduation. But its going to a good cause.
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Old 05-17-2004, 05:37 PM
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Default Re: phat head racing cylinder head

What dome are you going to try running first?
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Old 05-17-2004, 10:22 PM
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Default Re: phat head racing cylinder head

the one that is slightly higher compression than stock just because of my thinner base gasket i have on it now. But after i rebuild it and put a flat top piston and normal thickness gasket back on I will run the one that is one step higher. With striaght race gas.
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Old 05-17-2004, 11:40 PM
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Default Re: phat head racing cylinder head

Quote:
Originally posted by MXer-YoHon
the one that is slightly higher compression than stock just because of my thinner base gasket i have on it now. But after i rebuild it and put a flat top piston and normal thickness gasket back on I will run the one that is one step higher. With striaght race gas.
What Kinda bike you putting this on? Used one of those phat heads on my 02 CR250. Made a hell of a difference. Need to get CR-Flavor and I another one.
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Old 05-18-2004, 10:04 AM
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Default Re: phat head racing cylinder head

Quote:
Originally posted by MXer-YoHon
But after i rebuild it and put a flat top piston and normal thickness gasket back on I will run the one that is one step higher.
Your bike already has a flat topped piston.
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Old 05-18-2004, 12:50 PM
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Default Re: phat head racing cylinder head

It is goin on to a 2003 cr250. I also have fmf sst exhaust, and v force reed valve.
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Old 05-18-2004, 01:26 PM
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Default Re: phat head racing cylinder head

Aww Sweet, Well welcome fellow pinger rider. I also have a CR250 but an 02. I have a FMF fatty, shorty combo, with V-force reeds, Barnet clutch, . The Phat head is a good buy, let us know how you like it.
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Old 05-18-2004, 09:27 PM
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Default Re: phat head racing cylinder head

Doesnt the sst get really narrow compared to the fatty right after the bladder for the cr250's?? Looks kinda funny right?? (not saying it a bad pipe)
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Old 05-18-2004, 09:44 PM
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Default Re: phat head racing cylinder head

Ya thats what I thought. I have the shorty silencer now (came with the bike) and I was probably just going to run the Fatty since its $50 cheaper and even if it did produce less power overall it cant be that much of a difference. But what you said makes sense.

Should I purchase the boysen exhaust flange too when I purchase the fatty?

Sorry for jacking the thread
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Old 05-18-2004, 09:51 PM
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Default Re: phat head racing cylinder head

Again, IMHO i believe that the Fatty/shorty combo will make a more usable powerband for all but the most skilled rider. Don't think that you're making a wrong choice because I don't think you are.

Roostman swears by the flange (and I'd take his word ) and it wouldn't be a bad investment for piece of mind. With that said, I have yet to break one, but I have a spare if I do.
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