Honda ATC 90 & 110 ATV Shop Manual 1973-1981
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Sample pages from the Honda ATC 90 & 110 ATV Shop Manual 1973-1981 manual
Purchase Information
1973-1981 Honda ATC 90 & 110 Three-Wheeler Shop Manual - Technical Specifications
- Document Number / Seller:
- 26372 / Barbara Wright
- File Size:
- 9.96 MB
- File Type:
- ZIP
- Language:
- _English_
- Pages:
- 116
- Printable:
- Yes
- Estimated Download Time:
- 0.2 Minutes
- Delivery Format:
- Digital (PDF) - Instant Access
- Category:
- Three-Wheeler
- Brand:
- Honda
- Reviewed and Approved:
- Dec 24, 2025
Honda Models and Parts Covered in this Three-Wheeler Manual
- Honda US90 (1973-1978)
- Honda ATC90 (1973-1978)
- Honda ATC90K2 (1975)
- Honda ATC90K3 (1976)
- Honda ATC110 (1979-1981)
- Honda CT90 (1973-1981)
Complete Manual Information
Honda ATC 90 & 110 ATV Shop Manual (1973-1981)
This comprehensive Shop Manual is the ultimate resource for the maintenance, repair, and restoration of the legendary Honda three-wheeler series. Covering the evolution from the early US90 to the powerful ATC 110, this document provides the technical depth required by serious collectors and mechanics alike. Unlike basic owner guides, this official shop manual includes specialized procedures for the unique Posi-Torque dual-range transmission and the distinct chassis requirements of these vintage All-Terrain Vehicles.
Complete Model Coverage
- Honda US90 (1973-1978)
- Honda ATC90 (1973-1978)
- Honda ATC90K2 (1975)
- Honda ATC90K3 (1976)
- Honda ATC110 (1979-1981)
- Honda CT90 (Engine references 1973-1981)
Technical Specifications & Serial Numbers
To ensure you are using the correct data for your specific machine, this manual includes critical serial number ranges:
- Honda ATC90 (1977 Models): Starting from Engine No. ATC90E-1600001 and Frame No. ATC90-1600001.
- Detailed specs for US90 vs. ATC90K3, including dry weight differences (196.2 lbs vs. 228.2 lbs) and tire size variations (22x11-3.5 vs. 22x11-8 ATV tires).
Comprehensive Table of Contents
- General Information & Service Precautions
- Maintenance, Inspection, and Adjustments
- Fuel System & Carburetor Overhaul (Keihin)
- Engine Removal, Installation, and Overhaul
- Recoil Starter & AC Generator Service
- Cylinder Head, Valve, and Piston Maintenance
- Clutch System & Oil Pump Service
- Transmission (including Sub-Transmission/Posi-Torque)
- Steering System & Front Wheel Assembly
- Rear Wheel, Axle, and Drive Mechanism
- Brake System (Front & Rear Drum Brakes)
- Electrical System, Ignition Timing, and Wiring Diagrams
- Troubleshooting Guides for Engine and Chassis
- Addendum Sheets for late-model specific updates
Professional Service Value
This manual stands out by providing exact tolerances and specialized instructions that you won't find in generic guides:
- Precise Torque Specs: Includes specific values like the 54-64 lbs-ft required for the clutch lock nut to ensure long-term reliability.
- Specialized Tooling: Detailed list of Honda special tools (e.g., Tool No. 07000-02801) required for 90cc engine service and steering stem adjustments.
- Posi-Torque Deep Dive: Complete disassembly and reassembly of the dual-range sub-transmission found in the ATC series.
- Tire & Rim Service: Professional instructions for the unique balloon tires, including bead-breaking procedures and cold-patch repair techniques.
Whether you are performing a simple oil change (1.0 US qt. capacity) or a full engine rebuild, this manual provides the diagrams, wire routing, and exploded views necessary to keep your vintage Honda three-wheeler in peak condition.
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Frequently Asked Questions - Honda Three-Wheeler Manual
What does this Honda manual cover?
This comprehensive service manual covers detailed repair procedures, maintenance schedules, troubleshooting guides, and technical specifications for Honda ATC 90 & 110 ATV Shop Manual 1973-1981. It includes information for the following models: - Honda US90 (1973-1978) - Honda ATC90 (1973-1978) - Honda ATC90K2 (1975) - Honda ATC90K3 (1976) - Honda ATC110 (1979-1981) - Honda CT90 (1973-1981).
Is this manual suitable for beginners?
Yes, this Honda manual is designed for both professional technicians and DIY enthusiasts. It includes step-by-step procedures with clear illustrations and safety guidelines for Three-Wheeler maintenance and repair.
What file format will I receive?
You will receive this manual as a ZIP file (9.96 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 Honda Three-Wheeler 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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