M8 120" Big Bore Kit

M8 120ci Big Bore Kit

The Fuel Moto 120" M8 bike bore is a true bolt on kit (does not require case boring) and is a complete package with the absolute highest quality components, all of which have been extensively tested in house both on the dynamometer as well as in real world conditions to deliver top level performance. This kit works on 2017 H-D Milwaukee-Eight 107" engines (air cooled & twin cooled) and when combined with the appropriate performance modifications offers output in excess of 130+ horsepower; even more with head work.

$1995 - 120" Fuel Moto M8 Big Bore Kit

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


The Fuel Moto M8 120" kit includes the following:

 

Custom Fuel Moto / CP Carillo Forged Pistons

Custom Fuel Moto / CP Carillo Forged Pistons

These forged pistons from CP Carillo are available in a specifically customized 11.2:1 compression ratio. The ring end gap is already set and are simply ready to be installed.

Fuel Moto Precision Bored Cylinders

New Precision bored cylinders with iron ductile liner

The Fuel Moto M8 120" big bore kit includes NEW cylinders with a ductile iron sleeve. There is no need to send your OEM cylinders in to Fuel Moto as new replacement cylinders are included with the kit.

Wood Performance Knight Prowler Camshaft

Wood Performance Knight Prowler Camshaft

The camshaft is the workhorse of any big bore kit which is why every single Fuel Moto big bore kit has a Wood Performance Knight Prowler camshaft inside. The Wood Performance WM8-999 has been built with this kit in mind and provides a strong power band offering early torque and high end horsepower alike. There are other cam options available, please contact us at 920-423-3309 for details.

Wood Performance M8 Alpha Series Directional Lifters

Wood Performance Alpha Series Directional Lifters

We all want more power with a big bore kit but would never want to sacrifice reliability. The Wood Performance Alpha Series Directional Lifters are a key component which addresses a common concern with the stock lifters which are simply not designed for the increased performance of a big bore kit. We are also a huge advocate of new parts on new parts so with a brand new Wood Performance camshaft we also install the brand new lifters on each and every build we perform in house.

Wood Performance BW-4V Valve Springs

Wood Performance BW-4V Valve Springs

We all want more power with a big bore kit but would never want to sacrifice reliability. The Wood Performance BW-4V Valve Springs prevent additional stress from utilizing a higher lifter camshaft.

Fuel Moto Quick Install Adjustable Pushrods

Fuel Moto Quick Install Adjustable Pushrods

The Fuel Moto quick install adjustable pushrods are the finest pushrods available. With a .095" chromoly tapered design which is engineered for maximum strength and durability these pushrods install right inside of the stock pushrod tube covers. Also included is our unique pushrod tube tool which holds the tubes in place for easy adjustment.

All Necessary Gaskets, O-Rings and Torrington Style Inner Cam Bearings

All Necessary Gaskets, O-Rings and a Torrington Style Inner Cam Bearing

No one wants to be in the middle of a build and find that they are missing a gasket or o-ring to complete their build. With the Fuel Moto big bore kits all the necessary gaskets, o-rings and inner cam bearing are included. We have already performed in house stress tests to find the best performing parts to ensure your build is reliable for years to come.

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.

Retail Price:

$1995.00 Complete kit

Professional turn key Installation:

$2895.00* 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)


 

Screamin' Eagle High-Flow Injector Kit - Milwaukee-Eight Engine (5.5 G/Sec)

Screamin' Eagle High-Flow Injector Kit - $149.95

The Fuel Moto 120" big bore kit exceeds the flow capabilities of the OEM injectors and will require the 5.5G/Sec high-flow injector upgrade kit. These injectors are a direct upgrade for your OEM injectors and are recommended to be installed into the stock throttle body.

Fuel Moto / AIM Variable Pressure Clutch

Fuel Moto / AIM Variable Pressure Clutch - $400

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

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 2/1/2 Head Pipe - $499

The Jackpot Milwaukee-Eight 2/1/2 Stainless Steel Head Pipe was designed specifically for the tuning & performance characteristics of the new Harley-Davidson Milwaukee-Eight. Fuel Moto has spent countless hours developing our head pipe and our systems continue to be the highest quality, best performing head pipes on the market! The Jackpot head pipe accepts the factory M8 heat shields we have made installation extremely easy by incorporating heat shield alignment tabs into the design. These alignment tabs allow for precise heat shield fitment and allow for the stock look without the excessive heat.

Fuel Moto M8 Cylinder Head Porting

Fuel Moto M8 Cylinder Head Porting - Coming Soon

Fuel Moto is working extensively to develop a new port profile on the new 4 valve platform. We are currently performing additional research and development and will be releasing a CNC cylinder head porting service to compliment your big bore kit in the near future.


Dyno Charts

 


2017 H-D Touring Model | 120" M8 Big Bore | Stock Heads | WM8-999 Cams

Description: 2017 Harley-Davidson Road Glide Milwaukee-Eight, Fuel Moto M8 120" big bore kit, Wood Performance Knight Prowler WM8-999 camshaft, stock cylinder heads & throttle body with 5.5gm injectors, Jackpot 2/1 exhaust and tuned with the Dynojet Power Vision.


2017 H-D Touring Model | 120" M8 Big Bore | FM M8 CNC Heads | WM8-999 Cams

Description: 2017 Harley-Davidson Road Glide Milwaukee-Eight, Fuel Moto M8 120" big bore kit, Wood Performance Knight Prowler WM8-999 camshaft, Fuel Moto M8 CNC cylinder head porting, Screamin' Eagle 64mm throttle body with 5.5gm injectors, Jackpot 2/1 exhaust and tuned with the Dynojet Power Vision.