Cometic gaskets

KC Gager kc at
Mon Mar 3 20:02:15 PST 2008

If you try and do 3 mm with stock head gaskets, if you go too far you'll
have water leaks going into the Combustion chamber, if you don't go far
enough you'll have hot spots with the thin edge of the gasket. That will act
like a glow plug on the 2 stroke airplane engine and you may get some
predetonation. Neither are good. I would look hard at the Cometics, May save
a lot of heartache. Who's pistons are you using?   

KC Gager
BRG Racing Products
"We Have Sickness For Quickness"
KC at

-----Original Message-----
From: Steve Robertson [mailto:srobertson at] 
Sent: Monday, March 03, 2008 5:09 PM
To: Suzuki SV650 Mailing List
Subject: Re: Cometic gaskets

What kind of tool/machinery do you use to bore out stock
head gaskets?

> cometic or bore out stock ones.
> cometic has same 3 layer steel gaskets as stock ones.
> copper ones are problem.

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