Harddrive CV Adaptor Spacer - M8 TO CV — Harley-Davidson Road King Special, Tri Glide Ultra Classic, Electra Glide Ultra Limited (2017-2025)

Harddrive CV adaptor spacer engineered to bridge Milwaukee-Eight (M8) and CV carb intake configurations on V-twin motorcycles. Enables use of 5-inch round aftermarket air cleaners with center bolt, or 90-degree air cleaner designs when paired with compatible adapter plates.

Features

• Allows 5-inch round AC outer covers with center bolt
• Compatible with 90-degree air cleaner designs
• Works with Harddrive adapter plates 820-505074 or 820-50575
• Compact 1-inch spacer height

Specifications

• Brand: Harddrive
• Manufacturer Part #: 120429
• UPC: 191361228933
• Dimensions: 5 in L x 5 in W x 1 in H
• Weight: 0.5 lbs
• Country of Origin: China (Taiwan)

Fitment

Fits V-twin motorcycles. Requires use with Harddrive adapter plates 820-505074 or 820-50575 for proper installation.

Frequently Asked Questions

What air cleaners does this spacer work with?

Any 5-inch round AC outer cover with a center bolt, plus 90-degree air cleaner designs when paired with a compatible Harddrive adapter plate.

Do I need an adapter plate with this spacer?

Yes — this spacer must be used with either Harddrive part 820-505074 or 820-50575 for proper fitment.

Will this fit my Milwaukee-Eight and CV carb setups?

This spacer bridges M8 and CV intake configurations. Verify your bike's intake type and required adapter plate before ordering.

What's the spacer height?

The spacer is 1 inch tall — designed to stack with your air cleaner and adapter plate for proper clearance and fitment.