1984-2002 Honda CR80R Service Manual (P/N 61GC401)

• Covers the 1984–2002 Honda CR80R series, documenting essential service data for the 79.7 cc water-cooled 2-stroke engine and chassis systems.
• Official Honda publication (P/N 61GC401), originally issued in August 1983.
• Features over 100 pages of high-resolution diagrams, exploded component views, and technical inspection references.
• Includes detailed carburetion data and ATAC system tuning specifications.

Engine and Fuel System Documentation

This factory reference breaks down the 2-stroke drivetrain with exact tolerances for bench work. Chapters detail the inspection and servicing of the cylinder head, piston assemblies, and reed valves. You get the hard data needed for component diagnostics, like cylinder-to-piston clearances and ring-to-groove limits. The fuel system section dives into the operational theory of the PE67A carburetor. It provides complete circuit breakdowns for the starter, slow jet, and main jet systems, alongside visual guides for cable routing and carburetor teardown.

Technicians will find the ATAC (Automatically-controlled Torque Amplification Chamber) system thoroughly documented. The literature covers inspection and adjustment values for the governor, rack, and cam components. Expect detailed torque limits for clutch and kick-starter linkages to guarantee assembly precision. Proper transmission oil and coolant capacity specs are also mapped out for standard maintenance intervals. Please note that while this reference offers exact OEM numbers, anyone performing heavy service on these systems should have proper mechanical certifications and observe standard shop safety practices.

Specification Highlights

Having the right numbers at your fingertips is critical in the bay. Engine mounting bolts require a precise 30–35 N-m torque. Cylinder head nuts pull down to 24–29 N-m, and the rear axle nut locks in at 55–70 N-m. Spark plug gap runs 0.7–0.8 mm for the NGK BR9ES. Beyond the hardware numbers, the documentation includes a full wiring diagram and comprehensive cable routing layouts for accurate reassembly.