1985-2000 Yamaha XT350 & TT350 Dual-Purpose Motorcycle Service Manual
Technical reference for the Yamaha XT350 and TT350, covering 1985-2000 models. Details maintenance, troubleshooting, and repair procedures with diagrams and specs. PN YM-01122.
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Yamaha Models Covered & Key Technical Specifications
Models: Yamaha XT350, Yamaha TT350
Sub-models / Variants: XT350N, XT350NC, XT350S, XT350SC, XT350T, XT350TC, XT350U, XT350UC, XT350W, XT350WC, XT350A, XT350AC, XT350B, XT350BC, XT350D, XT350DC, XT350E, XT350EC, XT350F, XT350FC, XT350G, XT350GC, XT350H, XT350HC, XT350J, XT350JC, XT350K, XT350KC, XT350L, XT350LC, XT350M, XT350MC, TT350S, TT350T
Build Years: 1985–2000
Serial Numbers: 1RG-000101 through JYA3NVCO-YA048494
Technical Data:
- Engine type: Air-cooled, 4-stroke, double-overhead cam, 4-valve
- Engine oil capacity (periodic change): 1,300 cc (1.37 qt.)
- Spark plug gap (XT350): 0.7–0.8 mm (0.028–0.032 in.)
- Spark plug gap (TT350): 0.6–0.7 mm (0.024–0.028 in.)
- Idle speed (XT350): 1,350–1,450 rpm
- Idle speed (TT350): 1,400–1,500 rpm
- Valve clearance (intake): 0.07–0.12 mm (0.003–0.005 in.)
- Valve clearance (exhaust): 0.13–0.17 mm (0.005–0.007 in.)
- Ignition timing: Fixed at 12° BTDC at 1,200 rpm; 34° BTDC at 5,000 rpm
- Engine drain bolt torque: 43 N·m (31 ft.-lb.)
Yamaha Manual Features & Content Preview
1985-2000 Yamaha XT350 & TT350 Service Manual
- Covers 1985–2000 Yamaha XT350 and 1986–1987 Yamaha TT350 dual-purpose motorcycles, including all N through M model-year sub-variants
- Third-party publication: Clymer Manuals, Primedia Business Directories & Media, © 2000 edition
- Contains 101 exploded-view diagrams and 14 detailed electrical wiring schematics
- 388 pages of technical documentation
- File link appears in your order confirmation straight away
- OCR text layer lets you jump to a torque spec by keyword
- This 2000 edition provides the definitive assembly data for the 350cc four-valve engine series, documenting final-year production refinements not present in earlier service literature
Factory Maintenance and Technical Specifications
This manual provides extensive documentation for the air-cooled, 4-stroke, double-overhead cam, 4-valve engine powering the 1985–2000 Yamaha XT350 and 1986–1987 TT350 series. The how factory workshop documentation is structured includes detailed procedural workflows for servicing the engine top end, clutch assemblies, kickstarter mechanisms, and transmission gear sets. Coverage extends to fuel, exhaust, and emission control systems, including specific adjustments for California-compliant sub-models. Maintenance schedules and periodic lubrication protocols are explicitly outlined, ensuring technicians utilize correct SAE 20W40 or 10W30 engine oil grades.
System Data and Reference Values
Comprehensive data tables document engine compression pressure requirements between 9–12 kg/cm² (128–171 psi). Valve clearance for the intake is listed at 0.07–0.12 mm in the cylinder head specification table. Engine drain bolt torque is specified at 43 N·m (31 ft.-lb.) in the engine assembly data. Cylinder head bolt torque values are documented in a multi-stage sequence. The 1985–2000 Yamaha XT350 ignition timing is fixed at 12° BTDC at 1,200 rpm and 34° BTDC at 5,000 rpm. Detailed charts provide reference data for tire inflation, battery state of charge, and torque specifications for standard fasteners.
Reference only — always consult a certified technician before performing service on this equipment. An official 388-page Clymer manual covering the 1985–2000 Yamaha XT350 & TT350, documenting engine, chassis, electrical, and fuel-injection specifications for the full production range of these dual-purpose motorcycles.
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