Vertex Complete Engine Rebuild Kit WR101-148 — KTM 85 SX / Husqvarna TC85 2013-2017

Vertex Complete Engine Rebuild Kit WR101-148 — KTM 85 SX / Husqvarna TC85 2013-2017

Product Description

The Vertex Complete Engine Rebuild Kit delivers a comprehensive overhaul solution to fully reset the power plant on your 85cc 2-stroke racing machine. Instead of sourcing individual components piecemeal, this convenient package groups everything needed for a structural top and bottom-end restoration into a single box. This system eliminates the uncertainty of high-performance maintenance, restoring factory-spec sealing, mechanical clearance, and operational balance to high-RPM mini engines.

Inside the WR101-148 kit, top-end compression is handled by a standard-compression Vertex piston kit complete with rings, wrist pin, and circlips. The bottom-end foundation is anchored by a Hot Rods heavy-duty crankshaft assembly built to stock stroke parameters, which includes the small-end wrist pin bearing. This system is reinforced by robust Hot Rods main bearings and oil seals, a complete transmission bearing array containing an output shaft collar and sprocket lock washer, counter balancer bearings, and a dedicated water pump rebuild assembly. A total engine gasket kit from Vertex seals the entire build from the crankcase up to the cylinder head.

Top Features: Vertex Complete Engine Rebuild Kit

• Complete top and bottom end engine restoration architecture bundled into a single convenient service box.
• Features a heavy-duty Hot Rods stock-stroke crankshaft paired with a standard-compression Vertex piston configuration.
• Supplied with specialized Hot Rods main, transmission, counter balancer, and water pump bearing or seal kits.
• Includes a full Vertex gasket array alongside an entire engine oil seal and O-ring profile to prevent fluids from leaking.

Please cross-reference your specific model sub-type and year range against our fitment index below to ensure precision parts matching before assembly.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Sub-Model
2013-2016	KTM	85 SX
2017	KTM	85 SX (17/14 Wheels)
2014-2017	Husqvarna	TC85 (17/14 Wheels)

Frequently Asked Questions

Q: Does this kit change the engine's original displacement or cylinder bore?
A: No, this engine package retains standard factory configurations. It utilizes a stock-stroke crankshaft and a standard-compression piston kit matching the 85cc engine architecture.

Q: Does the provided transmission bearing kit replace every internal gear box bearing?
A: Yes, it contains the critical transmission shaft bearings, along with the specific output shaft collar and sprocket locking washer to refresh the entire gearbox layout during a full case split.

Expert Pro-Tip: When performing a comprehensive 2-stroke engine overhaul that requires separating the crankcases, do not force the cases apart using a screwdriver or pry bars, as this permanently warps the aluminum sealing surfaces. Always utilize an appropriate crankcase splitter tool. Before dropping the new Hot Rods main bearings into place, cold-freeze the bearings overnight and gently warm the clean engine cases with a heat gun — the thermal differential allows the bearings to drop smoothly into position without damaging the precision bore surfaces.

Recommended Pairings:

• KTM 85 SX Performance Parts & Upgrades
• Husqvarna TC 85 Performance Parts
• KTM 2-Stroke Performance Parts

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