Harddrive Throttle Slide Vacuum Membrane - Keihin HD CV Carb — Harley-Davidson (1988-2026)

Harddrive throttle slide vacuum membrane for Keihin HD CV carburetors. Replaces torn or punctured seals on stock throttle slides without requiring a complete slide assembly swap. Fits 1988-present Sportsters, 1990-1999 Big Twins, and 1999-2006 Twin Cam models.

Features

• Replacement membrane seal only
• Fits all stock Keihin CV carb throttle slides
• Cost-effective alternative to full slide assembly

Specifications

• Brand: Harddrive
• Manufacturer Part #: 027690
• UPC: 191361166044
• Length: 4.7 in
• Width: 4.8 in
• Height: 0.85 in
• Weight: 0.01 lbs
• Country of Origin: China (Taiwan)

Fitment

Fits all stock Keihin CV carburetors on Harley-Davidson Sportsters 1988 to present, Big Twins 1990-1999, and Twin Cam models 1999-2006.

Frequently Asked Questions

Will this fit my Harley carb?

Yes, if your bike runs a stock Keihin HD CV carburetor from the fitment years listed. Non-OEM or aftermarket carbs may not be compatible.

Do I need to replace the entire throttle slide?

No — this membrane seal replacement allows you to save money by replacing only the torn or punctured seal instead of buying a complete slide assembly.

How do I know if my membrane is bad?

A torn or punctured vacuum membrane causes rough idle, hesitation, or stalling. If the slide physically moves but the carb doesn't respond smoothly, inspect the membrane.

Is this the OEM Harley part?

This is the aftermarket equivalent. The OEM Harley part is only sold as part of a complete slide assembly, making this a cost-effective standalone option.