It looks like we don't have any community posts for this product right now — Got relevant content to contribute?

About S&S Cycle M8 128in. Big Bore Kits

S&S Cycle M8 128in. Big Bore Kits

  • Available for both 107 and 114 M8 models.
  • Available in both highlighted and non highlighted versions
  • Wrinkle black finish
  • Non-highlighted fins
  • Bolt-on kit. Largest bore possible without machining required
  • includes gaskets and hardware required for installation
  • 4. 250in. bore
  • Forged pistons
  • 10. 5:1 compression ratio
  • Made in USA.

Warning:  California Proposition 65

Get Real Into It.

Sign up for the latest scoop on the products that matter in the motorcycle community.

PureMoto Network

Top brands and retailers together helping you locate and buy motorcycle products.

Search Nearby Retailers

See what is in stock at your local retailer. Put it on hold for pickup today.

Have it Delivered

We find it in stock and deliver to you from the nearest source.

PureMoto Influencers

As seen on Youtube Dirt N' Iron and Bike Builds with Aaron Colton.