KTM 620 Duke / 625 SMC / 640 Duke LC4 Oil Change Kit – Castrol 10W‑50 Full Synthetic + HiFlo Engine & Trans Filters + Crush Washers

OVERVIEW

This complete oil change kit delivers routine maintenance and cleaner engine operation for KTM LC4 single-cylinder engines. Formulated with premium full-synthetic Castrol Power 1 oil, the set includes matched engine and transmission filters along with necessary sealing hardware to simplify scheduled service. Designed specifically for the KTM 620 Duke, 625 SMC, and 640 Duke ranges.

ENGINEERING & PERFORMANCE

The full synthetic blend maintains stable viscosity under extreme heat and high-RPM loads, ensuring superior lubrication across both air-cooled and liquid-cooled configurations. Engineered shear stability combined with JASO MA2 certification protects the wet clutch while reducing friction losses during prolonged use. The matched dual-filter arrangement sustains consistent oil flow through the primary circulation and secondary transmission circuits.

KEY FEATURES

• Complete full-synthetic oil change kit for KTM LC4 platforms
• Castrol Power 1 10W-50 full synthetic motorcycle oil (JASO MA2)
• Synthetic formulation engineered for extreme temperature resistance
• Primary engine oil filter sized for reliable LC4 filtration
• Dedicated transmission filter ensures clean hydraulic routing
• KTM-specific crush washers included for leak-free fittings
• Excellent shear stability prevents breakdown under heavy load
• Sustained high-speed protection reduces accelerated wear
• Smooth gear-shift quality maintained in sequential transmissions

TECHNICAL SPECIFICATIONS

• Brand: Castrol, KTM Filters & Hardware
• Part Name: KTM 620 Duke / 625 SMC / 640 Duke LC4 Oil Change Kit
• Kit Type: Complete Full-Synthetic Oil Service Kit
• Oil Specification: Castrol Power 1 10W-50 Full Synthetic (JASO MA2)
• Filters Included: Primary Engine Oil Filter & Transmission Filter
• Supported Years: 1997–1998 (620 Duke), 2004–2005 (625 SMC), 1999–2006 (640 Duke LC4)
• Compatible Trims: Standard LC4 Air-Cooled & Liquid-Cooled Variants

FITMENT

• KTM 620 Duke (1997–1998)
• KTM 625 SMC (2004–2005)
• KTM 640 Duke LC4 (1999–2006)

WHY RIDERS CHOOSE THIS

Riders select this kit because it supplies everything needed for a precise LC4 service without splitting purchases across multiple vendors. The fully synthetic base fluid paired with twin filtration stages actively preserves internal tolerances and manages heat buildup in vintage single-cylinder architecture. Dedicated transmission and engine filters maintain unobstructed oil pressure, which reduces mechanical drag and extends time between overhauls. This targeted combination keeps classic KTM motors responsive while simplifying every scheduled maintenance cycle.