Motorex Cross Power 4T is a 100% fully synthetic, PAO/ester-based 4-stroke engine oil formulated specifically for high-performance off-road, motocross, enduro, and rally motorcycles. Modern four-stroke competition singles feature shared sumps with compact oil capacities—frequently between 1.0 and 1.5 liters—meaning the identical oil volume must simultaneously lubricate high-RPM cylinder heads, cushion straight-cut transmission gears, and cool wet clutch assemblies. This environment subjects conventional motor oils to severe mechanical shear and thermal breakdown.

Developed in direct partnership with KTM, Husqvarna, and GASGAS Factory Racing teams, Cross Power 4T delivers exceptional high-temperature film strength and shear stability. Its synthetic molecular base resists viscosity degradation caused by transmission gear mesh and high-stress camshaft operation. Formulated to meet strict JASO MA2 wet-clutch specifications, it ensures crisp, predictable clutch engagement without slipping or dragging under heavy feathering in technical terrain, while minimizing internal parasitic drag and piston scuffing.

Features:

• 100% Fully Synthetic Formulation: High-stability PAO and ester base stocks provide maximum thermal resistance under severe racing loads.

• JASO MA2 Clutch Certification: Engineered specifically for wet multi-plate clutches; eliminates clutch slippage under high torque and prevents clutch drag on gear engagement.

• Extreme Shear Stability: High-strength polymer formulation resists mechanical shearing from transmission gear sets to maintain viscosity throughout the service interval.

• Small-Sump Thermal Management: Formulated to withstand rapid heat cycling and high oil temps in compact, lightweight off-road engine cases.

• Catalytic Converter Safe: Low-volatility chemistry minimizes oil consumption, deposit formation, and exhaust catalyst contamination.

• OEM Recommended: Official factory-fill and service recommendation for KTM, Husqvarna, and GASGAS 4-stroke competition and dual-sport models.

What's in the Box:

• 1x Motorex Cross Power 4T Engine Oil (1-Liter / 33.8 fl oz Bottle)

• (Note: Select your required viscosity—5W-40, 10W-50, or 10W-60—from the variant dropdown menu before checkout).

Viscosity Selection & Application Guide:

• 5W-40: Recommended for modern liquid-cooled competition engines calling for 5W-40 factory fill, tight-tolerance European powerplants, or cold-weather riding where rapid oil circulation at sub-freezing startup is critical.

• 10W-50: Factory OEM standard specification for the vast majority of modern 4-stroke off-road and dual-sport models, including KTM, Husqvarna, and GASGAS 250, 350, 450, and 500cc platforms (SX-F, XC-F, EXC-F, FC, FE, EC-F, ES). Provides balanced cold-flow protection with robust high-temperature film strength.

• 10W-60: Mandatory factory specification for large-displacement single-cylinder engines subject to high thermal loads and large piston diameters, including the KTM 690 Enduro R / SMC R, Husqvarna 701 Enduro / Supermoto, and GASGAS 700 ES/SM (LC4 engine architecture). Also widely used in extreme-heat desert racing and multi-day rally raid competition to resist oil thinning from fuel dilution and prolonged high-RPM running.

• The LC4 10W-60 Requirement: If you ride a KTM 690, Husqvarna 701, or GASGAS 700, do not substitute 10W-40 or 10W-50 in place of 10W-60. The 693cc LC4 single utilizes a high-stress roller-rocker valvetrain and large piston surface area that generates high localized oil temperatures. Running lighter viscosity oils in these engines leads to accelerated rocker-arm roller bearing wear and camshaft pitting during sustained highway commuting or loaded adventure touring. Always use 10W-60 in LC4 platforms as specified in the owner's manual.

• Service Intervals in Small-Capacity Sumps: Unlike street bikes that carry 3 to 4 liters of oil, modern 250cc–500cc competition dual-sports (such as the KTM 350/500 EXC-F or Husqvarna FE 350/501) carry only 1.0 to 1.2 liters of oil. Because that modest volume absorbs all transmission gear shear, blow-by gases, and clutch friction material, oil breakdown occurs much earlier. Even with high-grade synthetic oil like Cross Power 4T, service intervals should not exceed 15 engine hours for aggressive trail/race use, or 1,000 miles for mellow dual-sport linking.

• Wet Clutch Friction Disc Pre-Soak: When installing new clutch friction plates during a top-end rebuild or clutch refresh, never assemble them dry. Submerge all friction plates in fresh Motorex Cross Power 4T for a minimum of 15 to 30 minutes prior to stacking them into the clutch basket. This allows the organic friction material to become fully saturated with fluid, preventing instant glazing, slipping, or hot spots during the initial startup and break-in cycle.