2007 Yamaha TT-R90(W) / TT-R90E(W) Service Manual

2007 Yamaha TT-R90 and TT-R90E Service Scope

• Covers 2007 Yamaha TT-R90(W) and TT-R90E(W) variants, detailing mechanical and electrical systems for both kick-start and electric-start configurations
• Official Yamaha publication P/N 3P2-28197-E0, first edition dated May 2006
• Features 8 comprehensive chapters ranging from general specifications and periodic maintenance to detailed chassis, engine, and electrical system schematics
• File delivered as a direct download the moment payment clears
• Indexed PDF search covers every chapter and appendix
• Contains 47 specific tightening torque charts and detailed cable routing diagrams for both base and E-start models
• This 238-page manual provides the factory-authorized specifications used for the 2007 model launch, including specific troubleshooting parameters for the CDI ignition and carburetor fuel systems

Technical Documentation Overview

The 2007 Yamaha TT-R90 and TT-R90E workshop manual organizes mechanical data into structured sections covering critical service tasks. The initial chapters define identification criteria and essential special tools required for engine disassembly, such as valve spring compressors and rotor pullers. Subsequent sections outline periodic maintenance intervals for the air filter, drive chain, and braking assemblies, followed by in-depth chapters on the single-cylinder SOHC engine architecture, constant-mesh transmission, and telescopic fork assembly. The electrical system section provides specific resistance values for the CDI unit, charging coils, and the electric starter relay utilized on the TT-R90E model.

Specification and Reference Data

This document provides essential engineering limits and tolerances for the 89 cc power plant. Intake valve clearance is specified at 0.05–0.09 mm, while exhaust clearance is documented at 0.08–0.12 mm. Crankshaft runout limits are set at 0.030 mm to ensure internal assembly precision. The engine oil system capacity for periodic changes is 0.80 liters. Final drive chain slack is strictly maintained at 40.0–53.0 mm for correct tension management. All service data shown here is for reference only — qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work. This official 238-page Yamaha OEM service manual covers the 2007 TT-R90 and TT-R90E, documenting engine, chassis, electrical, and fuel system specifications for the 3P2-series build.