Good gasket it’ll get five stars
Cometic Motor Case O-Ring & Seal Kit 1-Pack - Harley Milwaukee-Eight
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.
Maintain proper compression and prevent oil seepage within your Milwaukee-Eight motor case with this Cometic O-ring and seal kit. Engineered as an OEM replacement, this kit ensures a reliable seal at critical motor case junctions. It's a crucial component for any engine service or rebuild on your M8.
Why riders pick this
- OEM-equivalent Cometic seals for M8 motor case
- Maintains proper compression and prevents oil leaks
- Complete kit for one Milwaukee-Eight motor case
- Recommended for all engine disassembly and rebuilds
When you're cracking open the motor case of your Milwaukee-Eight, replacing the O-rings and seals is fundamental to a successful rebuild. This Cometic kit provides the necessary OEM-equivalent components to ensure your engine maintains proper compression and remains leak-free. Cometic's commitment to quality means these seals are designed to withstand the demands of a high-performance V-twin engine.
Critical Sealing for Your M8 Motor
- OEM-equivalent Cometic gasket technology for reliable sealing
- Maintains proper compression and prevents oil seepage
- Complete set of O-rings and seals for one M8 motor case
- Essential for engine rebuilds and major service
Rebuilding Your Milwaukee-Eight Engine
Whether you're doing a top-end refresh or a full bottom-end rebuild, new motor case O-rings and seals are paramount. These components ensure the integrity of your engine's internal oil passages and crankcase pressure. Always replace these seals when the motor case is disassembled to guarantee a fresh, tight seal and avoid future issues. Trust Cometic to help you bring your Milwaukee-Eight back to peak performance.
Specifications
- Brand: Cometic
- Manufacturer Part #: C10214
- Quantity: 1 pack
- Length: 8 in
- Width: 8.5 in
- Height: 0.25 in
- Weight: 0.2 lbs
Common questions
Will this O-ring kit fit my Twin Cam engine?
No, this Cometic O-ring and seal kit is specifically designed for Milwaukee-Eight (M8) engines and will not fit Twin Cam models.
When should I replace these motor case seals?
Cometic recommends replacing all motor case O-rings and seals whenever the motor case is disassembled for service, inspection, or rebuilding.
What's included in this 1-pack kit?
This 1-pack includes the complete set of motor case O-rings and seals required for one Milwaukee-Eight engine case.
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 | 68-10214 |
| WEIGHT | 0.2 lb |
Great stuff, good price also.