M8 117" and 124" Piston Cylinder kits


The Fuel Moto M8 117" (for 107" Milwaukee Eight 4.375" stroke engines) and 124" (for 114" & 117" Milwaukee Eight 4.5" stroke engines) big bore piston & cylinder Stage III kits were developed to work with a wide range of M8 cams and components. These kits feature FM proprietary 10.85 compression pistons by CP Carillo with valve relieves for up to .600 max lift and .200 TDC lift.

$699 - 117" FM M8 Piston & Cylinder Kit for factory 107" engines PURCHASE NOW

$699 - 124" FM M8 Piston & Cylinder Kit for factory 114" & 117" engines PURCHASE NOW 

Contact us at 920-423-3309 with questions or to place your order!


The Fuel Moto Stage III piston & cylinder kits include the following:

 

Custom Fuel Moto / CP Carillo Forged Pistons

Custom Fuel Moto / CP Carillo Forged Pistons

Forged pistons from CP Carillo with 10.85:1 compression ratio. The ring end gap is already set and are simply ready to be installed.

Fuel Moto Precision Bored Cylinders

Precision bored OEM cylinders

The Fuel Moto M8 Stage III big bore kits include bore/hone & finishing your suppled OEM cylinders. If you were looking for a immediate turnaround we also offer a core exchange program for OEM cylinders, Fuel Moto has finished M8 cylinders on the shelf ready to ship with a reasonable core charge. Cometic MLS head & base gaskets are included.  

 

Unlimited Technical Support From Fuel Moto

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 info@fuelmotousa.com or give us a call at 920-423-3309 - we will work together to get you up and running.

  


 

Fuel Moto / AIM Variable Pressure Clutch

Fuel Moto / AIM Variable Pressure Clutch - $350

The Fuel Moto / AIM variable pressure clutch is the most cost effective and powerful kit available to upgrade your H-D stock clutch to handle the added power of the Fuel Moto big bore kit. Developed by Fuel Moto with a specific weight combination to suit our engine packages this clutch will support 135+ horsepower / torque with the upgraded springs.

Dynojet Power Vision

Dynojet Power Vision - $399.99

The Dynojet Power Vision is a flash based fuel tuning tool which allows your motorcycle to be properly re-tuned for your Fuel Moto big bore kit and other performance modifications. We offer base fuel maps and continued fuel map support for your big bore kit with the Power Vision at no additional cost.

Jackpot M8 2/1/2 Head Pipe

Jackpot M8 Head Pipes - $499-$699

The Jackpot Milwaukee-Eight 2/1/2 and XXX Stainless Steel Head Pipes are designed specifically for the tuning & performance characteristics of the new Harley-Davidson Milwaukee-Eight. Fuel Moto has spent countless hours developing our head pipes and our systems continue to be the highest quality, best performing head pipes on the market! 

Fuel Moto M8 Cylinder Head Porting

Fuel Moto M8 Cylinder Head Porting - $899-$1399

The Fuel Moto M8 Level A and Level B CNC cylinder heads were developed through dyno & extensive flowbench testing to deliver maximum performance on hi-output H-D Milwaukee-Eight engines. 


Core Exchange

If you have purchased a Fuel Moto big bore kit and are sending back your cylinder cores for a core refund, returns are accepted within 30 days from the purchase date. If you are sending in your engine components to have service performed or if you have purchased a Fuel Moto big bore kit and are sending back your cylinder cores for a core refund please print, fill out, and include the following form with your return: Engine Component Returns Form.