Derby cover gasket question
Big Kahuna HDF Member
Joined: Feb 2006
Posts: 23,881
Likes: 34
From: USA
+1 my bike is a 2006 and on it's second orange o-ring. Only because I was stupid and tossed out a perfectly good one changing my primary factory fill at 500 miles. If you torque the derby screws to 100 INCH LBS in a star pattern you won't damage the gasket. Be sure to index your derby cover to it's original position. I scribed an arrow on the inside of mine indicating the top hole.
Elite HDF Member
Joined: Aug 2007
Posts: 4,265
Likes: 99
From: Northern VA
Same here. My pops sent mine out for etching ande I used his extra until mine came back. I have had 3 covers on there and they all worked with the frisbee.
Tourer
Joined: Oct 2008
Posts: 485
Likes: 0
From: Just outside of New Orleans, La.
When I changed my derby cover to the willie g skull cover, my 04 FXDLI had the one on the left on it. I reused it, when I took off the original cover the gasket stay on perfectly.
Jay
Jay
Outstanding HDF Member
Joined: May 2006
Posts: 2,378
Likes: 1
From: Boise, Idaho
I use the one on the left also. have it on my '06 WG and also one on my '07 UC. I replaced it on the first primary service, and have re-used it many times. it replaces the o-ring with no problems.
Road Warrior
Joined: Sep 2005
Posts: 1,429
Likes: 10
From: TX
Question about the o ring type, they original derby cover has a grove for the gasket and the other covers I have seen do not ??? Do you just put the gasket back into the grove on the primary side and not worry about the cover ?
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Advanced
Joined: Jul 2008
Posts: 80
Likes: 0
From: Coeurd'Alene, ID
The newer bikes like I think 07(?) and up stock derby covers that have an o ring groove in them. These are the ones that require the o ring. The accessory covers are the 06(?) and older style that don't have the o ring groove and use the flat frisby gasket. You can't use the o ring with the non o ring covers.
My 08 fatbob does not have an o ring groove in the primary. It is just a flat surface that the o ring or flat gasket can mate up to depending on which cover you have.
My 08 fatbob does not have an o ring groove in the primary. It is just a flat surface that the o ring or flat gasket can mate up to depending on which cover you have.
Last edited by lcntam; Jan 4, 2009 at 11:29 AM.
Road Warrior
Joined: Sep 2005
Posts: 1,429
Likes: 10
From: TX
My 08 Fat Bob has the groove for the o ring, I tried the other gasket when I switched to a denim black cover and torqued the bolts to 100 lbs, but it still leaked and had to switch back to the other chrome cover