Harddrive 40MM CV Carburetor

Harddrive 40mm CV carburetor for V-twin motorcycles, built as a direct OEM Keihin interchange with a brass fuel inlet and tuning jets included. Comes assembled with fuel line and vent hose, ready to bolt onto compatible manifolds.

Features

• 40mm CV carburetor body
• Brass fuel inlet (upgraded from stock plastic)
• Includes fuel line and vent hose
• Multiple tuning jets: slow #45, #48, #50; main #185, #190, #200
• Direct interchange with OEM Keihin CV carbs
• Stock-style choke cable compatible
• Rebuild kit available separately

Specifications

• Brand: Harddrive
• Manufacturer Part #: 40037
• UPC: 191361512230
• Bore: 40mm
• Type: CV Carburetor
• Dimensions: 6.5 in L × 5 in W × 4.5 in H
• Weight: 3 lbs
• Country of Origin: China (Mainland)

Fitment

Fits V-twin motorcycles with OEM Keihin CV carburetor mounting and manifold compatibility. Verify your bike's intake manifold flange before ordering.

Frequently Asked Questions

What's included in the box?

The carburetor body, fuel line, and vent hose. Choke cable and rebuild kit are sold separately.

Will this fit my Harley or Indian?

This 40mm CV carb fits most V-twin cruisers with compatible OEM Keihin CV mounts. Confirm your bike's carburetor flange size and manifold style before purchasing.

Is this a direct bolt-on replacement?

Yes — it's engineered as a direct OEM Keihin interchange. If your bike originally ran a Keihin CV carb, this Harddrive unit will fit the same way.

What do the extra jets do?

The slow jets (#45, #48, #50) tune idle and low-speed running. Main jets (#185, #190, #200) dial in cruise and wide-open throttle. Choose the set that matches your jetting needs.

Can I rebuild this carburetor?

Yes. Harddrive offers a separate rebuild kit with gaskets, seals, and internal components for maintenance or restoration.