Bore: No
Stroke: Yes
Actual Displacement = 89.18cc

Engine Modifications Required:
Cylinder: De-Bore, Port and Replate with Apticote 2000 ceramic bore coating.
Power Valves: N/A
Head: Rechamber to work with the stroker crank. 100 octane suggested for most conditions.
Crankshaft: Stroked and balanced.
Crankcase: Modified to clear stroker crank. Additional case mods needed to clear YZ112 Piston.
Blueprint: Calculate deck height, squish clearance, trapped volume, port timing and compression ratio and list on your perminant Spec-Sheet.

Notes: This kit requires you to send us your entire engine for modification, with kickstarter and shifter.

Notes: This is a national level engine package. The power delivery is designed to build confidence for young riders. It delivers torque and hook up that are un-paralleled in the industry that carrys to a screaming top end pull. This kit just makes all riders faster because it is smooth, easy to ride, and does not fall off the pipe like other engines out there.

Notes: This is the same bottom end as our YZ105 and YZ112 kits. We can also build you a YZ105/112 top end for later use in the supermini classes.

Notes: Prices listed are to install stroker kit parts in good condition engine. Should your engine need rebuild parts there will be additional charges. We will call for approval before we install any parts that will have additional charges. (example: rod kit, mains, main seals, trans parts)