Cometic Copper Washer
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Tourer
Joined: Aug 2014
Posts: 302
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From: Gambrill, MD
Cometic Copper Washer
Hey folks,
There are 8 copper washers included in the Cometic C9635 top end gasket kit I purchased recently for my '93 FLHTCU. The Cometic part number is RB02002. It's got a 5/8" OD and a 0.262 ID. It's 1/32" think. What are they for?
Thanks!
-Dave
There are 8 copper washers included in the Cometic C9635 top end gasket kit I purchased recently for my '93 FLHTCU. The Cometic part number is RB02002. It's got a 5/8" OD and a 0.262 ID. It's 1/32" think. What are they for?
Thanks!
-Dave
I had the same question a while back.
They are for the rocker box covers. After talking it over around here, I decided to use them. End up with three layers: Fiber washer then copper then steel on top.
I'm not convinced the coppers do anything. My bike didnt have them from the factory. I assume the idea is that the relatively soft copper will ensure evenly distributed pressure onto the fiber washers. Call it a "Can't hurt, might help" kind of thing.
They are for the rocker box covers. After talking it over around here, I decided to use them. End up with three layers: Fiber washer then copper then steel on top.
I'm not convinced the coppers do anything. My bike didnt have them from the factory. I assume the idea is that the relatively soft copper will ensure evenly distributed pressure onto the fiber washers. Call it a "Can't hurt, might help" kind of thing.
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,168
Likes: 7,676
From: Poolville
I like Omaha use all three, Fiber first then copper then the steel. When using both the fiber and copper, the copper washer works as a slip washer so the steel doesn't tear the fiber washer... Plus I like the way it looks...
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