Engine Kits

S&S 100in and 110in Power Package Inspired by our Pro Stock Drag Race engines, these updated big bore kit utilizes a Ductile Cast Iron liner wrapped in cast aluminum for optimum thermal conductivity and performance. Bolt-in kits do not require machining, rebalancing or engine removal, and include just about everything you’ll need to complete the installation. The biggest cylinder bore that can be installed in a stock crankcase without machining!  Features: The Power Package is the ideal combination of performance and savings to transform your Twin Cam HD without breaking the bank. Bump the Twin Cam from 103 to 110" as well as adding matched cams/plate/pump and everything else a high performance cam chest needs to reliable make big power. Largest big bore kit available without crankcase mods. Upgrade TC96 and TC103 to 110 cubic inches. Cylinders fit to pistons- No machining required. All parts required to upgrade to gear drive cam or hydraulic tensioners in one easy to order part number. Engineered package to deliver the best bolt in performance. 4" Bore bolt on cylinder and piston kit. 5:1 Compression Silver or Black Available S&S 585 Easy Start Cams in either gear or chain version, TC3 Oil Pump, TC3 Cam Plate, S&S cam chain tensioners or outer cam drive gears depending on selection Quickee Adjustable Pushrods with Tubes S&S Premium Tappets All Required Bearings and Gaskets 4" Bore bolt on cylinder and piston kit Cylinders fit to pistons- No machining required All parts required to upgrade to gear drive cam or hydraulic tensioners in one easy to order part number Buy the parts together and save money ( approx $400-$440) Engineered package to deliver the best bolt in performance available    

S&S 124" Power Packages for Milwaukee 8 Big Bore Kit: Bolt on kit. No case machining required 4.250" bore Forged pistons 11.1: compression ratio Oil Pump/Cam Plate Precision machined from billet aluminum Passage plugs removable for servicing Independent scavenge sections for flywheel cavity and cam chest Debris screens in both scavenge pickups Magnet in cam chest to help to stop debris from entering oil pump Increased flow capacity on both feed and scavenge side Pressure Relief Valve is adjustable with unit installed in engine Pushrods: Quickee pushrods Tappets: S&S premium tappets Tappet Cuffs: Billet aluminum construction Stronger than stock material eliminates distortion Improve tappet stability in high lift and high rpm situations Cam: S&S 550 Cam- Designed for Big Bore applications Valve Springs:

S&S 128 Power Package Milwaukee 8 Big Bore Kit: Bolt on kit. No case machining required 4.250" bore Forged pistons 11.1: compression ratio Oil Pump/Cam Plate Precision machined from billet aluminum Passage plugs removable for servicing Independent scavenge sections for flywheel cavity and cam chest Debris screens in both scavenge pickups Magnet in cam chest to help to stop debris from entering oil pump Increased flow capacity on both feed and scavenge side Pressure Relief Valve is adjustable with unit installed in engine Pushrods: Quickee pushrods Tappets: S&S premium tappets Tappet Cuffs: Billet aluminum construction Stronger than stock material eliminates distortion Improve tappet stability in high lift and high rpm situations Cam: S&S 550 Cam- Designed for Big Bore applications Valve Springs:

S&S 1250CC Sportser Conversion Kit Forged pistons - coated piston skirts with measurement window and S&S logo Forged pistons have larger than stock valve pockets and accepts up to 2.00" valves Kit includes S&S 1250cc pistons with rings and wristpins, S&S 3-9/16" bore cylinders, MLS head, base and exhaust gaskets, assembly lube and instructions Made in the U.S.A. 883 models will require the use of XL1200 cylinder heads to achieve correct compression ratios.

S&S XL883 to 1200 Conversion Kit Increase displacement from 883cc to 1200cc Saves time because pistons are already fit to the cylinders - ready to assemble out of the box Cylinders are constructed from premium aluminum castings with cast-in iron liners No machining No re-balancing of 883cc flywheels No cylinder head modifications Big bore 3-1/2" cylinders 9.4:1 with stock 883cc heads Kits include cylinders, pistons, rings and gaskets (head, base and exhaust) Made in the U.S.A.

Description If you are looking for the option to build up your own 98" big bore kit, look no further. The Fuel Moto Extreme Duty cylinders with heavy Ductile iron sleeve are available in a 98 CI, 3.937" bore and does not require boring. Includes piston kit, new Extreme Duty Cylinders, MLS head gaskets, and OEM base O-rings.  The Fuel Moto 98" Extreme Duty Cylinder / Piston Kit includes the following:   Custom Fuel Moto / CP Carillo Forged Pistons These custom forged pistons from CP Carillo are available in a 10.0:1 compression ratio. The ring end gap is already set and are simply ready to be installed.  Fuel Moto Extreme Duty Cylinders The cylinders are a core component for reliability for any big bore kit and we offer the very best with the Extreme Duty Cylinders. These cylinders are designed for maximum durability and top level performance which feature a centrifugally cast ductile iron sleeve and are 100% made in the USA. You get to keep your OEM cylinders and the Extreme Duty Cylinders are used in their place with this kit. Cometic MLS .030" head gaskets and OE H-D base o-rings Years of testing have driven us to select only the best components. We have already performed in house stress tests to find the best performing parts to ensure your build is reliable for years to come. Cometic multi layer steel head gaskets with Harley-Davidson OEM cylinder base o-rings will form the best seal.

Description If you are looking for the option to build up your own 107" kit, look no further. The Fuel Moto Extreme Duty cylinders with heavy Ductile iron sleeve are available in a 107 CI, 3.937" bore and do not require case boring. Kits include complete piston set, new Extreme Duty Cylinders, MLS head gaskets, and OEM base o-rings. Dynojet Power Vision base calibrations are available for many applications.   The Fuel Moto 107" Extreme Duty Cylinder / Piston Kit includes the following:  Custom Fuel Moto / CP Carillo Forged Pistons These custom forged pistons from CP Carillo are available in an assortment of compression ratios: 10.25:1, 10.50:1 for factory 96" & 103" heads, as well as 10.5:1, 10.75:1, or 11.0:1 for S&S Superstock, FM Outlaw, SE MVA and 110 heads. We also offer custom dome machining to fit your needs for a custom build if necessary (call 920-423-3309 for details). The ring end gap is already set and are simply ready to be installed.  Fuel Moto Extreme Duty Cylinders The cylinders are a core component for reliability for any kit and we offer the very best with the Extreme Duty Cylinders. These cylinders are designed for maximum durability and top level performance which feature a centrifugally cast ductile iron sleeve. Manufactured by S&S Cycle in Viola, WI USA Cometic MLS .030" head gaskets and OE H-D base o-rings Years of testing have driven us to select only the best components. We have already performed in house stress tests to find the best performing parts to ensure your build is reliable for years to come. Cometic multi layer steel head gaskets with Harley-Davidson OEM cylinder base o-rings will form the best seal.

Description If you are looking for the option to build up your own 110" kit, look no further. The Fuel Moto Extreme Duty cylinders with hi-strength steel liner are available in 110 CI, 4.000" bore and does not require case boring. This is the largest size you can install on stock cases without modification. Includes pistons, Extreme Duty Cylinders, MLS head gaskets, and OEM base O-rings.   The Fuel Moto 110" Extreme Duty Cylinder / Piston Kit includes the following:   Custom Fuel Moto / CP Carillo Forged Pistons These custom forged pistons from CP Carillo are available with different domes & compression ratios: 10.5:1 for factory 96" and 103" heads as well as 10.5:1, 10.75:1 or 11.0:1 compression for S&S Superstock, FM Outlaw or SE MVA & 110 heads. The ring end gap is already set and are simply ready to be installed. Custom piston dome machining is also available for your needs, please contact us 920-423-3309. Fuel Moto Extreme Duty Cylinders The cylinders are a core component for reliability for any kit and we include the very best with the Extreme Duty Cylinders. These cylinders feature hi-strength steel liners which allow for "Drop In" installation of 110" cylinders (4.000" bore diamter) without boring the cases on H-D Twin Cam engines with a 4.375" stroke. Manufactured by S&S Cycle in Viola, WI USA Cometic MLS head gaskets and OE H-D base o-rings Years of testing have driven us to select only the best components. We have already performed in house stress tests to find the best performing parts to ensure your build is reliable for years to come. Cometic multi layer steel head gaskets with Harley-Davidson OEM cylinder base o-rings will form the best seal.

Description The Fuel Moto M8 124" 11.0:1 compression piston & cylinder kit takes your 107" M8 engine to 124" with no engine case boring required. Includes proprietary FM piston kit by CP Carrillo utilizing their top level X-Forge design, new Extreme Duty cylinders, and Cometic MLS heads & base gaskets. This kit works on 2017-later Milwaukee-Eight 107" engines (air cooled & twin cooled) Touring and Softail. Works with stock or ported heads.   The Fuel Moto M8 124" 11.0 kit includes the following:  Custom CP Carrillo Pistons CP Carrillo pistons 11.0:1 compression ratio. 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 ready to be installed.   New Extreme Duty cylinders The Fuel Moto M8 124" 11.0 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 available in black with silver polished highlights or CVO granite finish with polished highlights. Manufactured by S&S Cycle in Viola, WI USA. Cometic MLS head & base gaskets are included.    What else do I need? 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. 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.  

Description Our value priced Fuel Moto SP 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, 22XE, & 222, Redshift RS-468, S&S 475, CR 460 & 480 and other similar grinds. Includes custom piston kit, new cylinders, and Cometic MLS heads & base gaskets. This kit works on 2017-later Milwaukee-Eight 107" engines (air cooled & twin cooled) Touring and Softail. Works with stock or ported heads.  The Fuel Moto SP 124" 10.75 kit includes the following:  Forged pistons  CP Carrillo Forged pistons 10.75:1 compression ratio, manufactured in USA. The ring end gap is already set    New cylinders The Fuel Moto M8 124" 10.75 big bore kit includes new cylinders. Note the cylinders in this kit are globally sourced, quality meets or exceeds the OEM cylinders (click here for our 124 kit with USA made cylinders) Cylinders are black with silver polished highlights. Cometic MLS head & base gaskets are included.   What else do I need? 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.  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.

Description Our value priced Fuel Moto SP M8 128" big bore 10.75 compression piston & cylinder kit takes your Harley Davidson 114" or 117" M8 engine to 128" 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, 22XE, 22XD, & 222, Redshift RS-468, S&S 475, CR 460 & 480 and other similar grinds. Includes forged piston kit, new cylinders, and Cometic MLS heads & base gaskets. This kit works on 2017-later Milwaukee-Eight 114" & 117" engines (air cooled & twin cooled) Touring and Softail. Works with stock or ported heads.  The Fuel Moto SP M8 128" 10.75 kit includes the following:  Forged pistons  CP Carrillo Forged pistons 4.250" bore, 10.75:1 compression ratio, manufactured in USA. The ring end gap is already set    New cylinders The Fuel Moto SP 128" 10.75 big bore kit includes new cylinders. Note the cylinders in this kit are globally sourced, quality meets or exceeds the OEM cylinders (click here for our 128 kit that includes USA made cylinders)  Cylinders are black with silver polished highlights. Cometic MLS head & base gaskets are included.   What else do I need? 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.  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.

Description The Fuel Moto M8 124" Outlaw piston & cylinder kits takes your 107" M8 engine to 124" with no engine case boring required. Includes special application, high compression pistons with choice of 11.5:1 or 12.0:1 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 new Extreme Duty cylinders (made in USA), and Cometic MLS heads & base gaskets. This kit works on 2017-later Milwaukee-Eight 107" engines (air cooled & twin cooled) Touring and Softail. Works with stock or ported heads.   The Fuel Moto M8 124" Outlaw kit includes the following:  Custom CP Carrillo Pistons Special application, custom CP Carrillo pistons, choice of 11.5:1 or 12.0:1 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. Ring end gap is already set and are ready to be installed.   New Extreme Duty cylinders The Fuel Moto M8 124" Outlaw 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 available in black with silver polished highlights or CVO granite finish with polished highlights. Manufactured by S&S Cycle in Viola, WI USA. Cometic MLS head & base gaskets are included.    What else do I need? 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. 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.  

Description The Fuel Moto M8 132" Outlaw piston & cylinder kits takes your 114" or 117" M8 engine to 132", this is the largest displacement available for the Milwaukee-8 engine without engine case boring. Includes special application pistons 11.25:1 compression. Pistons were designed for Fuel Moto by CP Carrillo race department with optimized skirt and barrel profile, CNC machined under lightening, and feature Calico premium skirt coating. Kit includes new 4.320" cylinders, 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.  This bolt on kit is designed for 4.5" stroke crankshaft with stock length connecting rods  The Fuel Moto M8 132" Outlaw high compression kit includes the following:  Custom CP Carrillo Pistons Special application, custom CP Carrillo pistons - 4.320" bore, 11.25:1 compression ratio (assuming factory 89cc chamber) with optimized skirt and barrel profile, CNC machined under lightening, & Calico premium skirt coating. Includes Total Seal rings, end gap is already set and are ready to be installed.   New bolt on, big bore cylinders The Fuel Moto M8 132" Outlaw big bore kit includes new big bore cylinders that do not require case boring. Cylinders feature black finish with silver polished highlights. These cylinders feature hi-strength steel liners which allow for "Drop In" installation. (4.320" bore diameter) without boring the cases on H-D Milwaukee-8 engines with a 4.5" stroke. Manufactured by S&S Cycle in Viola, WI USA. Kit includes Cometic MLS head and base gaskets.    What else do I need? 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. 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.  

Description The Fuel Moto M8 128" big bore 10.75 compression piston & cylinder Builder Kit takes your 114" or 117" 4.5" stroke M8 engine to 128" 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, 22XE, 222, Redshift RS-468, S&S 475, CR 460, CR 480 and other similar grinds. Includes custom CP Carrillo dished piston kit, new Extreme Duty cylinders, 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. Works with stock, ported, or SE cylinder heads.  The Fuel Moto M8 128" 10.75 kit includes the following:  CP Carrillo Forged Pistons proprietary FM custom CP Carrillo dished pistons 10.75:1 compression ratio, premium X-forging with fully developed skirt profile. The ring end gap is already set and are simply ready to be installed.   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 available in black with silver polished highlights or CVO granite with polished highlights. Manufactured by S&S Cycle in Viola, WI USA. MLS head & base gaskets are included.    What else do I need? 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. 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.

Description The Fuel Moto M8 128" 11.0:1 compression piston & cylinder kit takes your 114" or 117" M8 engine to 128" with no engine case boring required. Includes proprietary FM piston kit by CP Carrillo utilizing their top level X-Forge design, new Extreme Duty cylinders, 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. Works with stock or ported heads.  The Fuel Moto M8 128" 11.0 kit includes the following:  Custom CP Carrillo Pistons CP Carrillo pistons 11.0:1 compression ratio. 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.   New Extreme Duty cylinders The Fuel Moto M8 128" 11.0:1  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 available in black with silver polished highlights or in CVO granite finish with polished highlights. Manufactured by S&S Cycle in Viola, WI USA. Cometic MLS head & base gaskets are included.    What else do I need? 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. 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.