Comprehensive Owner's Manual and Service Guide for Yamaha YZ490L Motocross Motorcycle 1984
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Sample pages from the Comprehensive Owner's Manual and Service Guide for Yamaha YZ490L Motocross Motorcycle 1984 manual
Purchase Information
1984 Yamaha YZ490L owner´s and service manual - Technical Specifications
- Document Number / Seller:
- 26565 / Barbara Rodriguez
- File Size:
- 13.66 MB
- File Type:
- ZIP
- Language:
- English
- Printable:
- Yes
- Estimated Download Time:
- 0.28 Minutes
- Delivery Format:
- Digital (PDF) - Instant Access
- Category:
- Bike
- Brand:
- Yamaha
- Reviewed and Approved:
- Jun 30, 2025
Yamaha Models and Parts Covered in this Bike Manual
Yamaha Motor Corporation, Ltd
- YZ490L (1983-1984)
- YZ 490 L (1983-1984)
Complete Manual Information
Professional Service Manual for 1984 Yamaha YZ490L Motocross Legend
Master the maintenance and repair of your high-performance racing machine with this comprehensive technical guide. Specifically designed for the 1984 Yamaha YZ490L, this manual is the ultimate resource for competitive riders and vintage motocross enthusiasts who demand peak performance from their air-cooled open-class powerhouse.
The Yamaha YZ490L is a cornerstone of 1980s motocross history, known for its massive 487cc 2-stroke engine and the innovative Monocross suspension system. Whether you are performing a complete engine overhaul or fine-tuning the Mikuni VM40SS carburetor for race day, this manual provides the exact specifications and step-by-step procedures required to keep your "Yellow Screamer" at the front of the pack.
Targeted Model Coverage
- YZ490L (1983-1984)
- YZ 490 L (1983-1984)
Quick Identification Specs
To ensure you are using the correct data for your specific bike, verify your serial numbers:
- Vehicle Identification Number (VIN): Located on the right side of the steering head pipe (Starting Serial: JYA40T00EA000101).
- Engine Serial Number: Stamped on the elevated part of the right rear section of the engine (Starting Serial: 40T-000101).
- Model Code: 40T
Inside This Comprehensive Manual
Engine & Drive Systems Get detailed instructions for the 487cc torque-induction engine. This section covers the critical piston-to-cylinder clearances (Standard: 0.080–0.085 mm), reed valve inspection, and the Yamaha Energy Induction System (Y.E.I.S.). It includes full tear-down and reassembly guides for the 4-speed constant mesh transmission and the wet multi-disc clutch.
Advanced Chassis & Suspension Tuning The YZ490L featured the "De Carbon" system Monocross rear suspension. This manual provides specific gas pressure settings (Standard: 171 psi) and damping adjustments to tailor
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Frequently Asked Questions - Yamaha Bike Manual
What does this Yamaha manual cover?
This comprehensive service manual covers detailed repair procedures, maintenance schedules, troubleshooting guides, and technical specifications for Comprehensive Owner's Manual and Service Guide for Yamaha YZ490L Motocross Motorcycle 1984. It includes information for the following models: **Yamaha Motor Corporation, Ltd** - YZ490L (1983-1984) - YZ 490 L (1983-1984).
Is this manual suitable for beginners?
Yes, this Yamaha manual is designed for both professional technicians and DIY enthusiasts. It includes step-by-step procedures with clear illustrations and safety guidelines for Bike maintenance and repair.
What file format will I receive?
You will receive this manual as a ZIP file (13.66 MB), which is compatible with all devices. The manual is fully searchable and printable for your convenience.
How quickly can I access the manual after purchase?
You'll receive instant access to your Yamaha Bike manual immediately after payment completion. The download link is valid for 3 days, with lifetime re-download guarantee.
Can I print specific sections of the manual?
Absolutely! This digital manual allows you to print any section you need, from individual pages to complete chapters, making it perfect for workshop use.
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