Phathead Racing heads

mx295
Posts
4296
Joined
4/1/2008
Location
Quartz Hill, CA US
Edited Date/Time 1/25/2012 10:39pm
Anyone ever used these or know of someone that has?
http://phatheadracing.com/
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rgmx-49
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1035
Joined
11/18/2010
Location
Fort Lauderdale, FL US
3/4/2011 1:32pm
Roscoe33
Posts
942
Joined
12/10/2009
Location
London CA
3/4/2011 1:53pm
Don't plan to run the Canadian Nationals with one of those...

from CMRC Pro Rulebook...

1) Engines - The engine must be from the approved
model, and the manufacturer’s crankcase,
cylinder and cylinder head from the approved
model must be used.

Check your sanctioning body first.
Pat327
Posts
685
Joined
2/18/2008
Location
CA US
3/4/2011 1:59pm Edited Date/Time 3/4/2011 2:03pm
I have one on my 2003 YZ125 along with a flat top piston and a Pro Circuit pipe and silencer. It makes a huge difference over stock. Much better power everywhere. You have to use race fuel, though.

I also have one on my 1990 CR125. I've never ridden it, but it sounds great.

ryanxmx31
Posts
89
Joined
2/20/2010
Location
Sturgeon Bay, WI US
3/4/2011 5:14pm
I bought one a while back, none of the gaskets fit right on top of the head! they r a wast of money!, your better off milling your head down. or buying a used head on ebay and shaving it

The Shop

T-Fish
Posts
3247
Joined
12/14/2009
Location
Sparta, WI US
Fantasy
3/5/2011 7:08am
mx295 wrote:
Anyone ever used these or know of someone that has?
http://phatheadracing.com/
I traded one to a friend of mine and he just called me the other day asking if I wanted it back. He just put a 144 kit on his '06 YZ125 and has no use for it now.



You interested? He's looking to sell it...
MOTODAD422
Posts
429
Joined
9/26/2008
Location
Easton, PA US
3/5/2011 4:14pm
I used 1 on a RM85 works good, came with 2 combustion chambers. one was close to stock compression,but the other one you had to use race gas.
3/5/2011 4:26pm
mx295 wrote:
Anyone ever used these or know of someone that has?
http://phatheadracing.com/
T-Fish wrote:
I traded one to a friend of mine and he just called me the other day asking if I wanted it back. He just put a...
I traded one to a friend of mine and he just called me the other day asking if I wanted it back. He just put a 144 kit on his '06 YZ125 and has no use for it now.



You interested? He's looking to sell it...
You have to use race gas? It wouldn't be any good on 93? If it is how much! Lol
3/5/2011 4:35pm
run them on a RM250 and pretty happy with quality and performance.
danman
Posts
1204
Joined
4/1/2008
Location
Readstown, WI US
3/5/2011 6:11pm
I've got one for an 05+ YZ125 I would be willing to part with, if anyone is interested.
mx295
Posts
4296
Joined
4/1/2008
Location
Quartz Hill, CA US
3/5/2011 7:28pm
I already milled my head. I was just curious if anybody ran these and what they thought about.. Thanks guys

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