✓ VERIFIED
Apr 1, 2024
keeps them lookin shiny
keeps the oil on the right side
COMETIC
SKU: 68-9305F5
Cometic Evo Big Twin Inspection/Derby Cover Gasket 5-Pack - Harley-Davidson
$42.59
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About Cometic
Cometic Gasket manufactures multi-layer steel head gaskets and complete gasket kits in Concord, Ohio. On a built V-twin running higher compression or a big-bore kit, the MLS head gasket is what keeps the top end sealed — which is why Cometic is the default spec on so many engine builds.
Ensure your Evo Big Twin primary stays sealed tight with this Cometic inspection and derby cover gasket 5-pack. A direct replacement for OE# 34906-85A, these gaskets are engineered to prevent leaks and maintain compression.
Why riders pick this
- Direct OE# 34906-85A replacement
- Designed for Evo Big Twin engines
- Prevents leaks and maintains primary compression
- Bulk 5-pack for shops or multi-bike owners
- Ensures a reliable seal for inspection/derby covers
For shops or riders who frequently service Evo Big Twin primaries, this Cometic 5-pack of inspection and derby cover gaskets is an essential item. Each gasket is crafted to OEM specifications, providing a secure and leak-free seal that stands up to the demands of your Harley-Davidson V-twin engine.
Reliable Sealing for Evo Big Twins
- Direct replacement for OE# 34906-85A
- Engineered for Evo Big Twin engines
- Prevents oil leaks and compression loss
- Convenient 5-pack for multiple services or spares
Smart Choice for Routine Maintenance
Having a supply of fresh derby cover gaskets on hand streamlines maintenance and ensures you're always ready for a primary fluid change or inspection. Cometic's commitment to quality means these gaskets offer consistent performance, allowing you to confidently button up your primary and hit the road without worry.
Specifications
- Brand: Cometic
- Manufacturer Part #: C9305F5
- Quantity: 5 per pack
- Length: 6.05 in
- Width: 7 in
- Height: 0.45 in
- Weight: 0.09 lbs
Common questions
What OEM part number does this gasket replace?
This Cometic gasket is a direct replacement for Harley OEM part number 34906-85A, used on Evo Big Twin engines.
Why should I buy a 5-pack instead of single gaskets?
The 5-pack is ideal for professional shops, riders who service multiple bikes, or those who prefer to keep spare gaskets on hand for future maintenance, offering convenience and value.
Will this gasket fit my Milwaukee-Eight engine?
No, this gasket is specific to Evo Big Twin engines. Milwaukee-Eight engines utilize a different gasket design and require a different part number.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Cometic |
| TYPE | Gaskets/Seals |
| SKU | 68-9305F5 |
| WEIGHT | 0.09 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.71
14 RATINGS
5★
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✓ VERIFIED
Dec 4, 2023
Easy to install. Good quality and price. Does what it is supposed to do
✓ VERIFIED
Apr 9, 2019
Very good quality/value for the price, I would buy them again.
✓ VERIFIED
May 1, 2016
Good gasket, I like these because they are the same thickness as factory, and do not change the end play on the cam and breather
✓ VERIFIED
Apr 29, 2015
Decent gasket. Sticks out of the nosecone cover a bit at the top as it doesn't follow the nose cone shape precisely. Seals well.
✓ VERIFIED
Jun 22, 2014
easy to replace just like oem
