Bore: Yes
Stroke: No
Actual Displacement = 103.48cc

Engine Modifications Required:
Cylinder: Bore, Port and Replate with Apticote 2000 ceramic bore coating.
Power Valves: N/A
Head: Rechamber to work with the Big Bore piston. 100 octane suggested for most conditions.
Crankshaft: No crank mods required.
Crankcase: Crankcase mods required to clear piston.
Blueprint: Calculate deck height, squish clearance, trapped volume, port timing and compression ratio and list on your perminant Spec-Sheet. (Some operations with install only)

Notes: This kit requires you to send us your cylinder, head, and powervalves for modification.

Notes: Core parts subject to inspection before credits will be issued.

Notes: This is an entry level engine package that has excellent power delivery for the supermini classes. It holds it's own against YZ105's and YZ112's. Many builders call this a 105cc kit.

Notes: It can be later stroked to 112cc with head mods.