Coffman Sizzler setup and tuning

CRJ

CRJ

Hibernating
Location
Toronto
i think on the 44 i had i ran 135m 120p. if you can get a 701 top end, the porting is VERY different.
 
j0hnny

j0hnny

Location
detroit MI
This is just my backup ski it will stay a 650 for people that are new to all this stuff. Just need her to have a little more pep than totally stock lol
 
King Kang

King Kang

Never enough tray time...
Location
Cary, NC
j0hnny said:
Can anyone point me to jetting recommendations for this pipe.6m6 35cc Ada head. 9 15 hooker
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I posted the instructions from Coffman earlier in this thread and they specify the jetting for a 650. I changed the needle as they recommended and it runs perfect. I have a 9/15 hooker too, but the head is stock.
 
mattT44

mattT44

classy
Location
ATL
I'm trying to find out on my sizzler if I need open flow ports on the gasket or keep it whole. I can't find any info on that anywhere.
 

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johnboy72

johnboy72

Location
England
orangefinger said:
the Coffman's has a couple of great sweet spots with 701-760 engines, its secret lays in the water restriction and will differ with water routing dual or single... also head pipes differ with 2 or 3 pissers.
From my experience >> The pipe itself should not be dried out so much that pipes actually sizzles , a good starting point for dual cooling is to restrict head approx. 4 mm and the stinger side approx. 3 mm. ( if you don't have a flow control valve ).
Our jetting was always run with a 1.5 N/S which seemed to work better than the Coffman's suggested 2.0 N/S, but we also had a higher pilot and main.
Click to expand...
Hi there
Have you got any photos of the water rooting for dual cooling?
Thanks John
 
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