Product Specs:

• This clutch mount with jackshaft is compatible with most go karts, minibikes, or ATVs.
• The jackshaft is 5/8" OD x 10-1/2" L with 3/16" keyway.
• The clutch mount itself is 11" x 4" and is 1/8" thick it is a steel product.
• The clutch mount has (2) 5/8" high speed bearings pressed in.
  

* This was originally manufactured for many of the Yerf-Dog go karts. Fits all Yerf-Dog go-karts with Tecumseh engines.