1985-2000 Yamaha XT350N/NC Factory Service Manual (P/N LIT-11616-04-73)
Yamaha Models Covered & Key Technical Specifications
Models: Yamaha XT350, XT350N, XT350NC
Sub-models / Variants: 49-State model, California (NC) model
Model Years: 1985–2000
Serial Numbers: JYA57T00 FA000101 (General), JYA56R00 FA000101 (California)
Technical Data:
- Engine displacement: 350 cc
- Idle speed: 1,300–1,400 r/min
- Compression pressure (standard): 1,079 kPa (156 psi)
- Spark plug gap: 0.7–0.8 mm (0.028–0.032 in)
- Intake valve clearance (cold): 0.08–0.12 mm (0.003–0.005 in)
- Exhaust valve clearance (cold): 0.13–0.17 mm (0.005–0.007 in)
- Drive chain slack: 30–40 mm (1.18–1.57 in)
- Engine oil capacity (without filter change): 1.3 L
- Engine oil capacity (with filter change): 1.6 L
- Front fork oil capacity (each fork): 319 cm³
- Steering stem bolt torque: 54 Nm (39 ft-lb)
- Oil drain plug torque: 43 Nm (31 ft-lb)
Yamaha Manual Features & Content Preview
- Covers 1985–2000 Yamaha XT350N and XT350NC dual-sport motorcycles, including California emissions-compliant models
- Original 100-page OEM publication (P/N LIT-11616-04-73), first edition October 1984
- Features 47 exploded-view diagrams and 18 specialized torque-specification tables covering engine, chassis, and electrical assemblies
- Serves as the authoritative technical reference for the entire production run of the XT350 platform
Engine and Maintenance Details
Mechanics need fast access to reliable teardown specs. This official Yamaha documentation delivers deep technical insights into complete engine overhaul procedures. It breaks down the cylinder head, camshaft, piston assemblies, and transmission. You will find precise maintenance intervals mapped out for both standard and emissions-controlled units. It covers the essentials: oil changes, valve clearance adjustments, and spark plug intervals. Beyond basic service, the publication details critical inspection points for the oil pump, clutch housing, and shift cam assemblies. Factory wear limits for friction plates and gear teeth are clearly defined to eliminate guesswork on the bench.
Chassis maintenance is equally thorough. The manual outlines front fork oil capacities, drive chain slack settings, and steering head bearing adjustments. Suspension tuning data includes spring preload and damping configurations tailored for different riding and loading conditions. You also get baseline reference values for tire pressures and battery fluid levels.
Specification Highlights
Torque and clearance values are the backbone of any reliable rebuild. This manual supplies critical fastening procedures across all major motorcycle systems. For example, cylinder head bolt torque is strictly documented at 10 Nm, while crankcase holding screws require 7 Nm. Intake valve clearance must be set to 0.08–0.12 mm when cold. Exhaust valves need 0.13–0.17 mm. Factory fluid recommendations specify SAE 20W40 oil for ambient temperatures at or above 5°C, dropping to SAE 10W30 for colder climates. Working on motorcycle systems carries inherent physical risks, so always ensure your workspace is secure and verify these reference figures against your specific model year before tearing down the bike.
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