Vertex Water Pump Rebuild Kit - Husqvarna TC 85 14-15, KTM SX 105 06-11, SX 85 03-16

The Vertex Water Pump Rebuild Kit is designed to restore cooling system integrity on compatible KTM and Husqvarna small-bore two-stroke models. It covers the KTM SX 85 (2003–2016), KTM SX 105 (2006–2011), and Husqvarna TC 85 (2014–2015), making it a straightforward solution for addressing worn seals and related components that lead to coolant loss or overheating.

Vertex is an Italian manufacturer with a well-established presence in the motocross and off-road engine components market. This kit is suited to home mechanics and workshop technicians carrying out routine preventive maintenance or rectifying an active cooling system fault on the listed models.

• Covers KTM SX 85 (2003–2016), KTM SX 105 (2006–2011), and Husqvarna TC 85 (2014–2015)
• Designed to restore water pump sealing and prevent coolant leaks
• Sourced from Vertex, a specialist manufacturer of precision engine components for off-road motorcycles

Drain and flush the cooling system fully before beginning the rebuild to clear old coolant and any debris.
Inspect the water pump impeller, shaft, and housing for wear, scoring, or corrosion before fitting new seals — replace additional components if damage is found.
Lubricate new seals lightly with fresh coolant or a compatible assembly lubricant before installation to prevent tearing during fitment.
Torque all water pump housing fasteners to the specification listed in the OEM service manual for the relevant model year.
Refill with a fresh mixture of distilled water and a coolant suitable for aluminium engines; avoid tap water, which can cause mineral scaling.
Run the engine to operating temperature and check for leaks at the water pump cover and hose connections before returning the bike to use.
Re-inspect for seepage after the first few riding sessions, as new seals may settle slightly under initial heat cycles.
Store any unused kit components in a sealed bag in a cool, dry location away from sunlight to prevent premature seal degradation.