Primary Gasket Change Necessary?
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Road Master
Joined: Oct 2007
Posts: 811
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From: Inverness, FL
Primary Gasket Change Necessary?
Time for my 10,000 mile service. I read all the post I could think of but what about the gasket? If you add the primary oil through the clutch inspection plate do you have to change the gasket? Nice to know before I start the job.
HDF Community Team
Joined: Dec 2005
Posts: 5,394
Likes: 2,596
From: NC USA
RE: Primary Gasket Change Necessary?
NO. It's a rubber o-ring. The primary chain inspection cover gasket is another thing. You can usually get ny with good silicone sealer, but I'd recommend a new gasket at least every other time you pull it off.
Seasoned HDF Member
Joined: Jun 2006
Posts: 28,514
Likes: 3,951
From: Vermont
RE: Primary Gasket Change Necessary?
For your 06 it's not a rubber o-ring. It's a disc. #25416-99C It is easier to add fluid on your scoot through the chain inspection cover, but at 10k service you will want to do a clutch adjustment also so you can stick to filling it through the derby cover. Cheap insurance to change the gasket, don't cost much.
Big Kahuna HDF Member
Joined: Feb 2006
Posts: 23,881
Likes: 34
From: USA
RE: Primary Gasket Change Necessary?
Your bike yes, new gasket. My bike has the o-ring and I have used mine 3 times...
Just another of the many time & money saving benefits of the Dyna series...
Just another of the many time & money saving benefits of the Dyna series...
Outstanding HDF Member
Joined: May 2005
Posts: 3,116
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From: Glendale, AZ.
RE: Primary Gasket Change Necessary?
I bought a new Derby cover gasket anda primary chain inspection cover gasket before I did my 5000 mile service about 7 months ago and didn't use either one. The old ones looked good so I decided to reuse them and haven't had any problem with either one leaking. I willchange themwhen I dothe 10K service.
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Road Master
Joined: Oct 2007
Posts: 811
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From: Inverness, FL
RE: Primary Gasket Change Necessary?
The gaskets cost ~$10 or so. Could I have re-used the old ones? Sure, but since I had new gaskets I used them. The next time I think I'll also change to O-ring on the drain plug.
BTW, I put Rotella T syn in the primary. Based on other threads here (and independent lab results posted online) I'm thinking it is better to have a high detergentoil that cleans the moving parts than other oils that look brand new after 5000 miles but leave the grime inside the engine.
BTW, I put Rotella T syn in the primary. Based on other threads here (and independent lab results posted online) I'm thinking it is better to have a high detergentoil that cleans the moving parts than other oils that look brand new after 5000 miles but leave the grime inside the engine.
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