Wiseco Crankshaft Bottom End Kit WPC144 - Kawasaki KX250F 2004-2008

Product Description

The Wiseco WPC144 Crankshaft Bottom End Kit provides a complete rebuild package built for the demands of high-rpm four-stroke competition. Designed specifically for the Kawasaki KX250F, each crankshaft arrives factory assembled and precision trued to original equipment tolerances to ensure balanced rotation and smooth power delivery.

Built to handle hard racing conditions, the connecting rod features a double-forged design engineered for optimal grain flow and structural integrity. Shot-peened surfaces resist fatigue, while dual-drilled small-end lubrication holes supply the wrist pin with consistent oiling to control thermal transfer from the piston crown.

Top Features: Wiseco Crankshaft Bottom End Kit

• Factory assembled crankshaft precision trued to meet exact OEM runout specifications.
• Double-forged connecting rod design optimizes grain flow to maintain critical dimensional consistency.
• Shot-peened rod surface treatment relieves residual stress and prevents surface fatigue under load.
• Double-drilled small end provides additional wrist pin lubrication and cooling to minimize heat distortion.
• Kit includes the complete crankshaft assembly, dedicated main bearings, and a matching bottom-end gasket kit.

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Does this kit include the gaskets and bearings needed to seal the crankcase?
A: Yes, the WPC144 kit comes complete with the trued crankshaft assembly, main bearings, and a bottom-end gasket kit.

Q: Does the connecting rod require additional truing before installation?
A: The crankshaft arrives factory assembled and pre-trued to OEM tolerances, ready to install directly into properly prepared engine cases.

Expert Pro-Tip: When splitting the cases for a bottom-end rebuild on these early 250F models, never pull or pry against the crankcase mating surfaces. Use a dedicated case splitter tool to prevent gouging the aluminum, and thoroughly inspect the transmission oil screen and oil pump rotors for metal debris before installing your new crank.

Recommended Pairings:

• Kawasaki KX250F Performance Parts & Upgrades
• Kawasaki 4-Stroke Performance Parts
• Motorcycle Tools Performance Parts

At Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. We pride ourselves on great customer service, and every item ships FAST - straight to your door.

Moto-House MX - Choice of Champions - Your premier powersports source with great customer service and lightning-fast shipping straight to your door.