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 the integrity of your Harley Twin Cam Dyna's transmission with the Cometic Transmission Gasket Kit. Engineered as a direct replacement for OE# 26072-99, this kit ensures a secure, leak-free seal, essential for consistent shifting performance.
Why riders pick this
Cometic gasket technology for V-twin engines
Engineered for modern V-twin performance
Direct OE# 26072-99 replacement
Prevents transmission fluid leakage
Ensures proper shifting performance
The Cometic Twin Cam Transmission Gasket Kit is specifically engineered for V-twin motorcycles, offering a reliable sealing solution for your transmission case. As a direct replacement for OE# 26072-99, this kit is designed to prevent fluid leakage and maintain the precise internal environment needed for optimal shifting. Cometic's advanced gasket technology ensures durability and performance under the demanding conditions of your Twin Cam engine.
Reliable Sealing for Twin Cam Drivetrains
Cometic gasket technology optimized for V-twin engines
Engineered to match modern V-twin performance demands
Direct replacement for OE part number 26072-99
Helps prevent transmission fluid leakage
Essential for Dyna Performance
For Dyna riders, a properly sealed transmission is key to both performance and longevity. This Cometic gasket kit provides the high-quality components needed to ensure your transmission operates without issue. When performing transmission service, using a new, quality gasket set like this is crucial for preventing future leaks and protecting your investment. Always verify the OE gasket number matches your motorcycle's requirements before purchase.
Specifications
Brand: Cometic
Manufacturer Part #: C9640
OE Reference: 26072-99
Weight: 0.36 lbs
Common questions
Will this gasket kit fit my Harley Twin Cam transmission?
This gasket kit is designed for Twin Cam engines and is a direct replacement for OE# 26072-99. Please confirm that this OE gasket number matches the one required for your specific Harley Twin Cam model and year before purchasing.
What components are included in this kit?
The kit includes the complete transmission gasket set with all necessary sealing components for the transmission case assembly.
Do I need special tools for installation?
Standard gasket removal and installation procedures apply. You will need a gasket scraper to thoroughly remove old material and clean the mounting surfaces. Always refer to your service manual for detailed instructions and torque specifications.
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
68-9640
WEIGHT
0.36 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
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Oct 13, 2024
Don’t waste your time junk
Seal kit does not come with 5th gear seal so it is not a complete kit. I installed the kit and the main transmission seal was leaking worse then the oem seal I pulled out. Do not recommend it go buy oem Harley seals if you don’t wanna do the job twice like myself I even checked the transmission run out to see if was an issue in my end. Was not the case.
Cometic Twin Cam Transmission Gas...
$142.000,00
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