Harddrive Throttle Slide Vacuum Membrane - Keihin HD CV Carb Harley-Davidson
About Harddrive
Harddrive is the house performance and replacement line built for American V-twins, covering everything from engine hardware and electrical to controls, lighting and chassis parts. The range is aimed squarely at Harley-Davidson and Indian riders who want a direct-fit part without dealer pricing, and it spans decades of model years — from Evolution-era Softails to current Milwaukee-Eight baggers.
Regain crisp throttle response and optimal carburetor performance with this Harddrive throttle slide vacuum membrane. Designed as a direct replacement for torn or punctured seals in Keihin HD CV carburetors, this membrane is a cost-effective solution to common fuel delivery issues. It's an essential component for keeping your V-twin running strong.
Why riders pick this
- Replaces damaged vacuum membrane on Keihin CV carbs
- Restores proper throttle slide function
- Cost-effective repair solution
- Ensures optimal air/fuel mixture
A damaged throttle slide vacuum membrane can lead to poor throttle response, hesitation, and overall reduced engine performance on your Harley-Davidson. This Harddrive replacement membrane allows you to repair your Keihin HD CV carburetor without the expense of a complete throttle slide assembly. It restores the critical vacuum seal, ensuring your carburetor can properly regulate fuel and air mixture for smooth acceleration.
Restore Carburetor Performance
- Direct replacement for torn or punctured vacuum membranes
- Fits all stock Keihin HD CV carburetors
- Cost-effective alternative to replacing the entire throttle slide
- Essential for smooth throttle response and engine operation
Smart Maintenance for Your Carbureted V-Twin
Replacing just the vacuum membrane is a smart way to address common carburetor problems in many Harley-Davidson models equipped with a Keihin CV carb. This Harddrive membrane ensures proper vacuum operation, which is critical for the throttle slide to lift correctly. It's a vital part of any carburetor rebuild or tune-up, allowing you to get the most out of your carbureted V-twin.
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)
Common questions
What type of carburetor does this vacuum membrane fit?
This Harddrive throttle slide vacuum membrane is designed to fit all stock Keihin HD CV carburetors found on various Harley-Davidson models, including Sportsters, Big Twins, and Twin Cams from specific year ranges. Please confirm your carb type before ordering.
Do I need to replace the entire throttle slide assembly if my membrane is torn?
No, this replacement membrane allows you to repair just the torn or punctured seal, saving you the cost of purchasing a complete new throttle slide assembly. It's a more economical repair option.
Will installing this membrane change my motorcycle's performance?
If your original membrane was torn, replacing it will restore proper carburetor function, which can significantly improve throttle response, eliminate hesitation, and bring your engine's performance back to optimal levels. It's a repair, not a performance upgrade.
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 | Harddrive |
| TYPE | Intake/Carb/Fuel System |
| SKU | 820-50920 |
| WEIGHT | 0.01 lb |
