Click on image to zoom

Fuel Moto M8 124" Piston & Cylinder kit 10.75 Compression for 107 engines

Availability: IN STOCK. Big bore kits are assembled to order and generally ship within 48 hours
Pricing: $899.95



The Fuel Moto M8 124" big bore 10.75 compression piston & cylinder Builder Kit takes your 107" M8 engine to 124" with no engine case boring required, it was developed to work with a wide range of M8 cams and components. This lower compression kit works especially well with shorter lift/duration bolt in cams such as the Wood WM8-22x & 222, Redshift RS-468, S&S 475, CR 460 & 480 and other similar grinds. Includes premium "Black Edition" Wiseco dished piston kit, new Extreme Duty cylinders, and Cometic MLS heads & base gaskets. This kit works on 2017-2019 Milwaukee-Eight 107" engines (air cooled & twin cooled) Touring and Softail. Works with stock, ported, or SE cylinder heads. 

The Fuel Moto M8 124" 10.75 kit includes the following: 

Custom Fuel Moto / CP Carillo Forged Pistons

Wiseco Forged Pistons

premium Wiseco "Black Edition" forged dished pistons 10.75:1 compression ratio. These feature ArmorX piston and ArmorFit skirt coating for optimum performance & durability. The ring end gap is already set and are simply ready to be installed.


Fuel Moto Precision Bored Cylinders

New Extreme Duty cylinders

The Fuel Moto M8 124" 10.75 big bore kit includes new Extreme Duty cylinders with high strength ductile iron sleeves, bore/hone finish work is done on OEM level machinery to exact tolerances. Cylinders are black with silver polished highlights. Made in Viola, WI USA. Cometic MLS head & base gaskets are included. 


Unlimited Technical Support From Fuel Moto

You have done all of your research but maybe you still have a question. The technicians at Fuel Moto have the answers and would welcome your call. With every Fuel Moto big bore kit purchase we include unlimited technical support. Shoot us an email at or give us a call at 920-423-3309 - we will work together to get you up and running.

Retail Price:

$879.00 Piston kit, new cylinders, head & base gaskets.

Professional turn key Installation:

available at our location including the complete kit, break in & dyno tune on our state of the art dyno. (*does not include EFI tuning device, exhaust system, throttle body, injectors or other associated parts such as oil & filter)

Application List

Fitment for Fuel Moto M8 124" Big Bore Kit


  • FMS-M8-124-1075-KIT
  • FMS-M8-124-1075-KIT
  • Fuel Moto
  • IN STOCK. Big bore kits are assembled to order and generally ship within 48 hours
  • New

Shipping Information

  • Item Requires Shipping
  • 45.0 lbs.
  • W21.0000” x H14.0000” x L14.0000”
  • This item ships in its own box.