Vertex Complete Engine Rebuild Kit WR101-170 - Kawasaki KX85 2014-2026

Product Description

The Vertex WR101-170 Complete Engine Rebuild Kit delivers a comprehensive solution for complete top-and-bottom-end overhauls on two-stroke mini racers. Designed specifically for the Kawasaki KX85 platform, this package consolidates every core rotating assembly, sealing surface, and bearing set into a single box. Featuring a matched Vertex piston kit with a standard compression piston, rings, wrist pin, and circlips, this kit restores cylinder compression and combustion efficiency to original factory operating benchmarks.

The lower end is anchored by a Hot Rods heavy-duty stock stroke crankshaft paired with a dedicated wrist pin bearing. Engine longevity and smooth rotational operation are supported by a full array of precision components, including a main bearing and seal kit, complete transmission bearing set with an output shaft collar and sprocket lock washer, counter balancer bearings, and a water pump rebuild kit. A complete Vertex engine gasket kit with all necessary O-rings and oil seals is supplied to ensure airtight crankcase pressure and leak-free fluid containment.

Top Features: Vertex Complete Engine Rebuild Kit

• Complete one-box engine kit containing components required for both lower-end and top-end engine rebuilds.
• Vertex standard compression piston kit supplied with rings, wrist pin, and circlips.
• Hot Rods heavy-duty stock stroke crankshaft assembly supplied with wrist pin bearing.
• Full bottom-end support featuring Hot Rods main bearings, transmission bearings, and counter balancer bearings.
• Comprehensive sealing package including a full engine gasket set, oil seals, O-rings, 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: Does this engine kit include both top-end and bottom-end components?
A: Yes, this kit contains the crankshaft, main bearings, transmission bearings, water pump rebuild parts, full gasket set, oil seals, and the complete piston kit.

Q: What piston compression profile comes with the WR101-170 kit?
A: The kit comes with a Vertex standard compression piston kit complete with rings, wrist pin, and circlips.

Q: Are the lower-end transmission bearings included?
A: Yes, it includes a Hot Rods transmission bearing kit with transmission bearings, an output shaft collar, and a 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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