COMETIC SKU: 68-9491

Cometic Evo Big Twin Starter Shaft Oil Seal 5-Pack - Harley-Davidson Evo Big Twin

$49.000,00
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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 oil seal is specifically designed for Evo Big Twin V-twin engines, serving as a direct OEM replacement. It's crucial for preventing oil leaks from the starter cavity, which can lead to messy drips and potential starter damage.

Why riders pick this

  • Direct OEM replacement for Evo Big Twin engines
  • Prevents oil leaks from the starter shaft cavity
  • 5-pack for shops or multi-bike owners
  • Contributes to a cleaner engine and longer starter life

Maintaining the integrity of your Evo Big Twin engine means addressing every potential leak point. This Cometic starter shaft seal is engineered to the exact specifications needed to keep oil where it belongs. A worn or compromised seal can lead to unsightly leaks and compromise the longevity of your starter, making this a vital maintenance component.

Essential Sealing for Your Evo Big Twin

  • Direct OEM replacement specification for Evo Big Twin starter shafts
  • Prevents oil leakage from the starter cavity
  • Sold in a convenient 5-pack for multiple services or spare inventory
  • Crucial for maintaining a clean engine and protecting starter components

Keep Your Evo Big Twin Leak-Free

For shops or riders who frequently work on Evo Big Twin engines, this 5-pack of starter shaft seals is an essential stock item. Having spares on hand ensures you can promptly address any leaks and keep your V-twin running clean. Always verify this specific part number is correct for your Evo Big Twin model before installation.

Specifications

  • Brand: Cometic
  • Manufacturer Part #: C9491
  • Quantity: 5 per pack
  • Length: 6.05 in
  • Width: 7.05 in
  • Height: 0.3 in
  • Weight: 0.02 lbs

Common questions

What is the purpose of a starter shaft seal?

The starter shaft seal prevents oil from leaking out of the starter cavity on your engine. A proper seal is essential to avoid messy leaks and protect your starter from contamination.

Will this seal fit my Twin Cam or Milwaukee-Eight engine?

No, this specific seal is designed only for Evo Big Twin engines. Twin Cam and Milwaukee-Eight engines require different part numbers for their starter shaft seals.

Why is this seal sold in a 5-pack?

The 5-pack quantity is provided for the convenience of professional mechanics, riders who service multiple bikes, or those who prefer to keep spare seals on hand for future maintenance.

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
SKU68-9491
WEIGHT0.02 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.87
15 RATINGS
5★ 13
4★ 2
3★ 0
2★ 0
1★ 0
✓ VERIFIED
Jan 16, 2020

Almost identical to OEM. Good fit. I did miss that they are sold as each and not as a pair. Small detail and my fault but it did slow my project down a bit.

— Anonymous
✓ VERIFIED
Oct 18, 2021

Great seals and gaskets do the job once when you use quality gaskets

— Anonymous
✓ VERIFIED
Sep 26, 2019

Seal good and I haven't had any issues..

— Anonymous
✓ VERIFIED
Jun 27, 2025

It worked like it was suppose to, delivery was quick. <br />Pleased.

— Lloyd S
✓ VERIFIED
Dec 19, 2023

Just what I needed

Needed these when changing out intake manifold. They worked perfect for my ‘03 sporty.

— Carlos L
✓ VERIFIED
Jun 12, 2023

Cometic from here on out

These seals are the only ones I'll use. others came close but, for me, these are best.

— Vincent S