Vertex Complete Engine Rebuild Kit WR101-110 - Kawasaki KX85 2005

Product Description

The Vertex WR101-110 Complete Engine Rebuild Kit delivers a comprehensive solution for complete top-and-bottom-end overhauls on 2005 Kawasaki KX85 two-stroke motorcycles. Packaging every necessary rotating assembly, bearing, and seal into a single box, this kit eliminates the need to source individual components across multiple orders. At the top end, a precision-engineered Vertex piston kit featuring a standard compression piston, rings, wrist pin, and circlips restores factory cylinder compression, combustion sealing, and sharp throttle response across the entire powerband.

The rotating bottom-end assembly is anchored by a Hot Rods heavy-duty stock stroke crankshaft paired with a dedicated wrist pin bearing. Transmission durability and smooth shifting action are supported by a complete Hot Rods transmission bearing kit that includes gearbox bearings, an output shaft collar, and a sprocket lock washer, alongside counter balancer bearings. A full Vertex engine gasket kit covering both top and bottom cases, complete oil seal kit, main bearings, and a water pump rebuild kit ensure complete crankcase pressure integrity and reliable coolant containment under rigorous race conditions.

Top Features: Vertex Complete Engine Rebuild Kit

• All-inclusive two-stroke engine rebuild package combining top-end and lower-end rotating components.
• Vertex standard compression piston kit supplied complete with rings, wrist pin, and circlips.
• Hot Rods heavy-duty stock stroke crankshaft assembly including small-end wrist pin bearing.
• Comprehensive transmission bearing package featuring main bearings, counter balancer bearings, and countershaft bushing and seal kit.
• Complete top and bottom Vertex engine gasket kit with full oil seal set and water pump rebuild 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: What main assemblies are supplied in the WR101-110 package?
A: The kit includes a Hot Rods crankshaft assembly, Vertex piston kit, complete gasket kit, oil seals, main bearings, transmission bearings, water pump rebuild kit, countershaft bushing/seal kit, and wrist pin bearing.

Q: Does this kit change the factory engine displacement or stroke?
A: No, this kit uses a standard compression piston and a stock stroke heavy-duty crankshaft designed to maintain original 85cc factory engine specifications.

Q: Does the transmission kit include the output shaft hardware?
A: Yes, the transmission bearing kit includes the full set of transmission bearings, the output shaft collar, and the sprocket lock washer.

Expert Pro-Tip: When performing a full crankcase split on a KX85, avoid drawing the case halves together using the case bolts, which can misalign bearings or side-load the crankshaft webs. Use dedicated crankcase assembly tools to draw the crankshaft into the main bearings, and freeze the bearings while gently warming the aluminum cases for a smooth, drop-in fit. Always lubricate the small-end wrist pin needle bearing with quality two-stroke oil before final cylinder installation to prevent dry scuffing during initial startup.

Recommended Pairings:

• Kawasaki KX85 Performance Parts & Upgrades
• Kawasaki 2-Stroke Performance Parts
• Motorcycle Tools Performance Parts & Upgrades

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