✓ VERIFIED
Apr 17, 2025
Gasket quality
Great gasket kit over delivered in the quality of the gasket set great job
COMETIC
SKU: 68-9689
Cometic EVO Sportster Head/Base Gasket .040 Stock Bore 2-Pack - Harley Sportster
$59.50
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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.
This Cometic head and base gasket set is designed for EVO Sportster engines with a stock bore, featuring a .040 inch thickness. Sold as a 2-pack, these gaskets provide a reliable drop-in replacement engineered for V-twin performance and durability.
Why riders pick this
- 2-pack for full rebuild or spares
- Designed for EVO Sportster stock bore
- .040 inch thickness for optimal seal
- Cometic OEM-level gasket technology
When performing top-end service or a rebuild on your Evolution Sportster, using high-quality head and base gaskets is paramount for maintaining compression and preventing leaks. This Cometic set is precision-engineered for stock bore applications, ensuring a perfect fit and consistent seal, even under the demands of a performance V-twin.
Engineered for EVO Sportster Reliability
- Convenient 2-pack for a full rebuild or spare
- Designed for EVO Sportster engines with stock bore
- Features a .040 inch thickness for precise sealing
- Utilizes Cometic's proven OEM-level gasket technology
Critical for Top-End Integrity
Whether you're refreshing an older Sportster or simply performing routine maintenance, these gaskets are an essential component for a successful top-end job. Their specific design for stock bore EVO Sportster engines ensures compatibility and long-lasting performance. Always double-check your engine's bore size before ordering, as oversized or bored engines require different gasket specifications for proper sealing.
Specifications
- Brand: Cometic
- Manufacturer Part #: C9689
- UPC: 191070017958
- Quantity: 2 per pack
- Thickness: .040 in
- Length: 6 in
- Width: 7 in
- Weight: 0.17 lbs
Common questions
How many gaskets are included in this pack?
This pack contains two complete head and base gasket sets, which is enough for one full engine rebuild or provides one spare set for future service.
Will this fit my big-bore Sportster engine?
No, this gasket set is specifically for stock bore EVO Sportster engines. Big-bore or stroker motors require gaskets with different dimensions and thicknesses. Please verify your bore size before ordering.
Do I need to replace my head bolts with these gaskets?
This gasket set does not include head bolts. You should inspect your existing head bolts to determine if they are reusable or if new studs are required, especially for torque-to-yield applications. Consult your service manual.
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 | 68-9689 |
| WEIGHT | 0.17 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.67
18 RATINGS
5★
16
4★
0
3★
1
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1★
1
✓ VERIFIED
Jun 3, 2023
DONT FOLLOW PRINTED INSTRUCTIONS!
DON’T FOLLOW THE INSTRUCTIONS ON THE BOX!!! It says recommended torque is 42 lb/ft. You know what happened at 32lb/ft? One of bolts broke! And I was lucky there was long enough piece sticking out to remove it without drilling out! Check photos.
✓ VERIFIED
Feb 21, 2022
Fits well!
✓ VERIFIED
Sep 10, 2021
Quality part great service and got it ahead of time great place
✓ VERIFIED
Jun 7, 2021
No leaks!!<br />Ordering was a breeze. Shipping was fast and I live way out in the middle of the Pacific Ocean, Hawaii. Price was much better than competition.
✓ VERIFIED
Nov 1, 2020
Great gaskets. Bike has been running great ever since I installed these last week, about 270 miles on em, no issues
