COMETIC SKU: 68-9508F

Cometic Panhead/Shovelhead/Evo Big Twin Starter Shaft Housing Gasket - Harley Big Twin

$18.42
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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 starter shaft housing gasket is a direct replacement for Panhead, Shovelhead, and Evolution Big Twin engines. It's specifically designed to seal the shaft housing, preventing oil seepage at the starter mounting point. Maintaining this seal is crucial for the longevity and cleanliness of your classic V-twin.

Why riders pick this

  • OEM-equivalent replacement for starter shaft housing
  • Prevents oil seepage at the starter mounting point
  • Fits Panhead, Shovelhead, and Evo Big Twin engines
  • Essential for a clean, leak-free V-twin engine

Oil leaks can be a frustrating reality on older V-twin motorcycles, but this Cometic starter shaft housing gasket offers a reliable solution. Engineered to OEM specifications, it provides a precise fit and effective seal where the starter motor meets the engine case. This small but critical component plays a big role in keeping your engine compartment clean and your oil where it belongs.

Secure Sealing for Starter Assemblies

  • Direct OEM-equivalent replacement gasket
  • Specifically seals the starter shaft housing
  • Prevents oil leakage at the starter motor mounting point
  • Compatible with Panhead, Shovelhead, and Evolution Big Twin engines

Maintain Your Classic V-Twin

Whether you're performing routine maintenance or addressing an existing leak, replacing worn gaskets with quality components is key. This Cometic gasket is a straightforward install, ensuring that your classic Harley-Davidson or Indian Motorcycle V-twin maintains its integrity. It's a fundamental part of proper engine care, helping to protect other components from oil contamination.

Specifications

  • Brand: Cometic
  • Manufacturer Part #: C9508F
  • Weight: 0.07 lbs

Common questions

What is the primary function of this gasket?

This gasket seals the junction between the starter motor and the engine case, specifically at the shaft housing, to prevent oil leakage from that area.

Will this gasket fit my Panhead engine?

Yes, this gasket is designed for Panhead engines, as well as Shovelhead and Evolution Big Twin platforms. Always confirm fitment for your specific model.

Is this a simple bolt-on replacement?

Yes, this is designed as a direct replacement. You would remove the old gasket and install this new Cometic gasket in the same location without modifications.

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.
BRANDCometic
TYPEGaskets/Seals
SKU68-9508F
WEIGHT0.07 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.36
14 RATINGS
5★ 11
4★ 0
3★ 1
2★ 1
1★ 1
✓ VERIFIED
May 16, 2026

not what I needed. description wasn't very clear but not worth sending back. oh well just have to be more careful next time

— John L
✓ VERIFIED
Mar 8, 2026

Gasket

Working fine was for my brother's bike

— CHARLES S
✓ VERIFIED
Oct 25, 2024

Works Fine at a lower cost

I usually have an OEM from Harley Davidson, I have used this twice on my 04 Electraglide, no leaks or issues. At a much lower price.

— Danny D
✓ VERIFIED
Jun 8, 2024

A mediocre gasket

I didn’t use this gasket after removing the derby and seeing the Harley gasket that I removed. No comparison in quality. I ended up going to the local dealer and bought an O.E. gasket.

— JOHN P
✓ VERIFIED
Jun 6, 2023

A good buy

The gasket fit nicely and no leaks so far . The fitment was spot on .

— John H
✓ VERIFIED
May 4, 2023

There is nothing on them indicating they are actually Cometic gaskets. Are they Substitutes?

— CRAIG B