Call to order 608-842-0680
Availability: built to order
$2295
YZ144 Specifications:
Fits 2005-Current YZ125 / YZ125X
Notes: This Kit requires you to send us your entire engine for modification with Kick starter and shifter
Product Description
Bore: Yes (56mm)
Stroke: Yes (58.5mm)
Actual Displacement = 144.08cc
Engine Modifications Required:
Cylinder: Bore, Port and Replate with Ceramic Nickel Bore coating.
Power Valves: Precision machined to exact specifications.
Head: Rechamber to work with the custom Wiseco piston and stroker crankshaft. 100 octane suggested for most conditions.
Crankshaft: Stroked
Crankcase: Crankcase mods to clear stroker crank.
Blueprint: Calculate deck height, squish clearance, trapped volume, port timing and compression ratio and list on your perminant Spec-Sheet.
Notes: The YZ125 does not work the greatest at 144cc when it is all done with bore. The transfer ports drop too much and it gets flat feeling with a lot of torque and little over-rev. The Max Power YZ144 uses a smaller 56mm bore combined with a stroker crank modification. The piston is very light so balancing the crank is not necessary. A bore only YZ144 is not even close to the power of this kit. The Max Power YZ144 has a nice torquey feel on the bottom and just screams all the way past where a stock YZ125 falls off the pipe. This kit makes an awesome schoolboy class weapon. If Yamaha built a YZ144 they probably would do it like this.
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