M-Spec Performance Services, Cylinders and Big Bore Kits

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M-Spec Bolt-On Cylinders

M-Spec Bolt-On Cylinders are new standard bore OEM replacement cylinders modified with our proprietary Nickel Silicon Carbide (NSC) cylinder bore plating process. Each M-Spec cylinder has been engineered to exceed OEM cylinder performance and reliability at significantly less cost than the OEM part.

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M-Spec Bolt-On Cylinder Kits

M-Spec Bolt-On Kits are new OEM replacement cylinders modified with our proprietary Nickel Silicon Carbide (NSC) cylinder bore plating process and perfectly matched with a high compression standard bore or big bore piston and Cometic gasket kit. Although there is no core charge or cylinder exchange required, core credits are available for specific models if your current cylinder is in acceptable condition.

M-Spec 2-Stroke Big Bore Kits are ported and require modification to your power valve and cylinder head. Some 105cc, 107cc, 144cc and 295cc kits require case modifications. These additoinal modifications are included in the price if you send us your bare cases. Engines received assembled will require engine rebuilding services and associated parts.

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M-Spec Service Cylinder Kits

M-Spec Service Big Bore Kits and Standard Bore Kits are based around your modified cylinder. Your cylinder or engine cases are shipped to our state of the art Plymouth, WI facility for a complete suite of modifications and then perfectly matched to a high-performance piston and gasket kit. Custom services and combinations are available.

M-Spec 2-Stroke Big Bore Kits are ported and require modification to your power valve and cylinder head. Some 105cc, 107cc, 144cc and 295cc kits require case modifications. These additoinal modifications are included in the price if you send us your bare cases. Engines received assembled will require engine rebuilding services and associated parts.

Select M-Spec Service Cylinder Kits are available as a core exchange. The cylinder is a used OEM cylinder meticulously remanufactured to exceed OEM specifications and modified with our proprietary Nickel Silicon Carbide plating process. A good core is required. When we receive your acceptable core cylinder, we credit the core charge back to your card. Please call 888-779-6885 for core availability.

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M-Spec CNC Cylinder Head Porting Service

M-Spec CNC ported head services are perfect additions to our cylinder kits. Each head modification design has under gone extensive testing in both simulations, on the dyno, and on the race track. Once the port design is optimized, the port is then digitized with laser accuracy so that we can reproduce the same perfect port every time. When we receive your head, it is CNC Ported, hand blended, and finished with a state-of-the-art CNC valve job, ready for installation.