Cometic gasket differences?
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
Anyone happen to know what the difference is between these top end gasket sets?
Cometic has not replied.
C9635
http://www.cometic.com/i-24866680-ha...-500-bore.html
This one has the caskets for the cam chest.
C9747
http://www.cometic.com/i-24866719-ha...tegory:1289536
This one doesn't have the cam chest gaskets.
The following two read that they have .030 head gaskets, no idea what the previous two have.
C9850
http://www.cometic.com/i-24866755-ha...tegory:1289536
C9851
http://www.cometic.com/i-24866756-ha...tegory:1289536
Cometic has not replied.
C9635
http://www.cometic.com/i-24866680-ha...-500-bore.html
This one has the caskets for the cam chest.
C9747
http://www.cometic.com/i-24866719-ha...tegory:1289536
This one doesn't have the cam chest gaskets.
The following two read that they have .030 head gaskets, no idea what the previous two have.
C9850
http://www.cometic.com/i-24866755-ha...tegory:1289536
C9851
http://www.cometic.com/i-24866756-ha...tegory:1289536
The first 2 might have the OEM thickness for their head gaskets.
Ultimate HDF Member
Joined: May 2006
Posts: 6,590
Likes: 444
From: Ohio
Please don't just delete your original post, others may be able to learn something. Fortunately THC quoted you so it was not lost.
Where are you buying your Cometic gaskets? I've found that their gaskets on Amazon are cheaper than direct from Cometic, example - .030 Evo head gaskets are $44. plus shipping, $33. free shipping on Amazon.
Where are you buying your Cometic gaskets? I've found that their gaskets on Amazon are cheaper than direct from Cometic, example - .030 Evo head gaskets are $44. plus shipping, $33. free shipping on Amazon.
Thread Starter
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Road Master
Joined: May 2014
Posts: 827
Likes: 59
From: Canada
I called, the first 2 are OEM thick head gaskets, they quote .040 thick
9635 is for later years EVO ( mine 97) the other for earlier years.
Amazon seems to be the cheapest for the 9635 kit.
9635 is for later years EVO ( mine 97) the other for earlier years.
Amazon seems to be the cheapest for the 9635 kit.
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,092
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From: Poolville
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Road Master
Joined: Jan 2013
Posts: 1,005
Likes: 103
From: Ghent NY
I had trouble with the Cometic gaskets, "not" the rocker box to the head but the center spacer and top. The cometic gaskets are not as wide as the HD ones. Both rocker boxes leaked. (and no they were not warped) Bought the HD rubber ones and NO leaks..
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Thread Starter
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Road Master
Joined: May 2014
Posts: 827
Likes: 59
From: Canada
I had the same problem with their top rocker box gasket on my Buell.
Could not get it to stop leaking, went through 3 sets.
Got stock Harley gasket, problem solved.
Seasoned HDF Member
Joined: Nov 2006
Posts: 12,878
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From: la la land jerzey
ruggs - the 4 th or 5th design harley gaskets are the deal for the evo rubber top covers only - sure you can get lucky and have another set not leak, but in a shop we use what works every time