The Fuel Moto M8 143" billet cylinder & piston kit takes your 114" or 117" Harley Davidson M8 engine to 143", engine case boring is required. Includes special application, high compression pistons with choice of 11.75:1 or 12.5:1 compression. Pistons were designed for Fuel Moto by CP Carrillo race department with optimized skirt and barrel profile, and feature Calico premium skirt coating. Kit also includes CNC machined billet cylinders from Motorwitch Industries (made in USA), and Cometic MLS heads & base gaskets. This kit works on 2017-later Milwaukee-Eight 114" & 117" 4.5" stroke engines (air cooled & twin cooled) Touring and Softail.
Special application, custom CP Carrillo 4.500" pistons, choice of 11.75:1 (flat top), or 12.5:1 compression ratio with optimized skirt and barrel profile, Calico premium skirt coating. These FM custom pistons use CP's premium X-Forging for reduced friction and maximum durability. The ring end gap is already set and are simply ready to be installed.
Motorwitch Industries billet cylinders with extreme strength ductile iron sleeves. CNC machined from solid billet aluminum, these unique cylinders allow for cooler engine temps and remain true under the harshest conditions. Available in raw silver finish only. MLS head & base gaskets are included. Requires engine case boring
This kit is designed for big horsepower, you will need an exhaust system, air cleaner, EFI tuner, and clutch spring and/or lockup to support the appropriate power level of this kit. Milwaukee-8 engines also require larger fuel injectors. Fuel Moto engine kits require installation by a qualified mechanic with experience in engine building and the appropriate tools to check all clearances & tolerances during engine assembly following the OEM service manual procedures and any additional instructions provided. You will need a OEM service manual and some specialty tools such as a inner cam bearing removal/install tool. These engine kits also require comprehensive tuning, we will supply the appropriate FM base tune. Check our FM University site for helpful tips and info.
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 [email protected] or give us a call at 920-423-3309 - we will work together to get you up and running.
Available at our location including the complete kit, break in & dyno tune on our state of the art dyno.
