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COMET A-4 Cam Arm

$ 23.95

In stock

A-4 Cam Arm

Part #: 2121351

COMET quality guaranteed.

Available for ship to store or drop ship.


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COMET A-4 Cam Arm

Additional information

Weight 0.13 lbs
Part Number

2121351

UPC Code

815646010425

Punctuated Part Number

212135-1

Vendor Part Number

212135A1

Vendor Punctuated Part Number

212135A1

Commodity Code

1140

Commodity Group

TRANSMISSION-CLUTCH GROUP

Commodity Type

CENTRIFUGAL CLUTCHES-PRIMARY

Product Description

COMET A-4 Cam Arm

Key Features

  • Either original equipment in the Comet drive clutches or a popular replacement for trail riding or racing
  • 102-C, 108-C and 108-EXP clutches all use the same basic cam arm
  • 108 4-PRO clutches use FOUR cam arms. (To find the required cam arm weight, add the weight of three cam arms used in a 108-EXP or other three-post clutch, add 14%, then divide by FOUR. This will give you the required new cam arm weight.)
  • When ordering cam arms for a 108 4-PRO clutch, you must order FOUR cam arms to get the correct weight
  • Comet arm weight objective is within .75 grams of that listed. Certified weights would be significantly more expensive. The variance may occasionally exceed 2 grams and is a result of greater or lesser arm density.

Technical Specifications

  • Weight: 0.13 lbs
  • UPC: 815646010425
  • Supplier Number: 212135A1
  • Unit of Measure: Each

Current Warehouse Inventory

Stock by Location:

  • Janesville, WI: 3 units
  • Batavia, NY: 0 units
  • Dallas, TX: 0 units
  • Fresno, CA: 0 units
  • Reno, NV: 0 units
  • Asheville, NC: 0 units
  • National: 3 units

Total Available: 6 units

Inventory Last Checked: December 4, 2025 at 1:00 AM UTC

Thank you for Shopping at Knobtown Cycle!

When you shop with us, you’re not just buying motorcycle parts — you’re supporting a small, family-run business rooted right here in the heartland of America. Every order helps us keep riders on the road and fuels our passion for serving the motorcycle community.
From all of us at Knobtown Cycle, thank you for choosing local and riding with us.

Kit Fox – Owner Knobtown Cycle

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