2006–2012 Honda TRX90 / TRX90EX / TRX90X Service Manual (P/N 61HNP06)

• Covers 2006–2012 Honda TRX90, TRX90EX, and TRX90X off-road ATVs.
• Official Honda OEM publication P/N 61HNP06 (298 pages).
• Contains highly detailed exploded-view diagrams, exact torque specifications, and system-level wiring schematics.
• Available as an instant download the exact moment your payment clears.
• Fully indexed PDF search functionality covering every chapter and appendix.
• Optimized for standard letter and A4 printing directly in your shop.

Mechanical and System Documentation

This reference provides exact technical data for the 85.8 cm³ engine and its four-speed semi-automatic transmission. It outlines precise maintenance parameters to keep the machine running optimally, including oil change intervals, drive chain adjustments, and valve clearance checks. You will find dedicated sections breaking down the cylinder head, fuel delivery, lubrication, and electrical components. Detailed illustrations make it easy to identify chassis, steering, and braking parts during complex tear-downs or rebuilds. Because this manual is an instant download, you can immediately open these schematics on a tablet right next to your toolbox, saving valuable diagnostic time on the shop floor.

Specification and Reference Data

Crucial technical specifications include a cylinder compression pressure of 1,226 kPa (178 psi) and standard spark plug gaps of 0.60–0.70 mm. Engine oil drainage volume is documented precisely at 0.7 liters. The text lists critical torque values, highlighting specs like 88 N·m for the axle bearing holder bolt, alongside standard fastener torque rules for 5 mm through 12 mm bolts. U.S. models also feature dedicated reference material for emission controls and the secondary air supply system. Always verify the ATV is securely supported on a lift and the engine is completely cool before inspecting these high-temperature or pressurized components to ensure a safe working environment.