Description

Honda Super Cub, Super Cub EX Technical Manual – 98-Page Factory Assembly Guide

Working on a Honda Super Cub or Super Cub EX built for the Eco Power fuel economy competition? That’s not your neighbor’s scooter. These are purpose-built machines, and the factory assembly manual is the only document that gets the details right. I’ve torqued enough bolts to know that when you skip the OEM specs, you end up with leaks, binding, or worse—a failure at speed. This Honda Super Cub, Super Cub EX Technical Manual is 98 pages of direct-from-Honda instructions, part numbers, and torque values. No aftermarket interpretation. The manual is in Japanese, but the diagrams are clear, and the part numbers are universal. Page 1 alone has 11 safety warnings that cover everything from high-voltage areas to the lack of a charging circuit.

98 Pages of Factory Assembly Data – Direct from Honda

This isn’t a reprint or a scan from a third party. It’s the original Honda technical manual used for assembling the competition-spec Super Cub and Super Cub EX. The 98 pages cover the complete build sequence: from the front wheel assembly to the engine mounting, fender installation, and drivetrain. Every page includes exploded diagrams with Honda part numbers. The fender section shows parts like 80101-GCT-J10 and 61102-GCT-J10. You won’t find that level of detail in a generic Clymer manual.

Safety Warnings on Page 1: High Voltage and Hot Engine

Page 1 is mandatory reading. The manual states that this vehicle has no charging circuit, so you must charge the battery before each run. It warns about exposed high-voltage wiring that can cause shock if insulation is poor or parts are wet. Engine and muffler surfaces get hot enough to burn through gloves. The manual also stresses that the handling and brake feel are different from a standard motorcycle—this isn’t for the road. Ignore these warnings, and you’re risking injury or a melted harness.

Does This Manual Cover Road-Going Super Cubs?

Short answer: No. This is specifically for the Eco Power fuel economy competition vehicle. The assembly steps overlap with a standard Super Cub (engine and frame mounting), but there are no headlights, turn signals, or charging system in this build. If you’re restoring a road-legal Cub, you need a Honda service manual for that year. However, for a dedicated race build, this is the only reference you need. The part numbers and assembly sequence are exact. For other Honda model manuals, check out Honda RIDGELINE Technical Manual – OEM Factory Fuel & Emissions, Honda MTS 3100 2003 Technical Manual – OEM Diagnostic Guide, and 2004 Honda Element DX Brake Components Manual.

Use the Correct Fasteners – Part Numbers in the Fender Section

Every bolt, washer, and nut is listed with its Honda part number. The fender section shows you need four BH6-25 bolts, WL6 washers, and NH6 nuts. If you use generic hardware, the clamping load will be wrong, and the fender will crack under vibration. The manual even specifies which side of the washer faces the bearing. That level of detail separates a solid build from a rattling mess.

Engine Mounting: Two-Person Procedure and Bolt Torque

The engine mounting section is clear: “Must be done by 2 or more people.” The engine weighs enough to shift on you, and the manual warns against cross-threading the mounting bolts. Hand-start all bolts before tightening. The manual doesn’t give a torque value in Newton-meters—it lists fastener sizes (BH8-30, WP8). Use a standard torque chart for M8 bolts in steel. The critical part is the sequence: mount the engine plate to the frame first, then lower the engine onto it. Skip that, and you’ll fight alignment for an hour.

Front Wheel Assembly and Tire Pressure at Page 5

The front wheel assembly includes specific bearing orientation and tire pressure. Page 5 says maximum air pressure is 5.6 kg/cm² (about 80 psi). That’s high because of the low rolling resistance tires used in competition. It also shows the proper orientation of the distance collar and speedometer drive (part 08E80-GBT-000). Get the bearing outer race contact wrong, and you add rolling resistance—exactly what you don’t want in an economy run.

OEM Authenticity: Why Aftermarket Manuals Fail Here

Aftermarket manuals try to cover every model with one generic procedure. They don’t list the specific part numbers for the competition EX model. They don’t mention the lack of charging circuit or the high-voltage warning. This manual is an original Honda document. According to the Automotive Industry Overview, OEM documentation is the gold standard for specialty vehicles. For background on transmission types, see Manual Transmission on Wikipedia.

Frequently Asked Questions

Is this manual in English?

No. It’s the original Japanese factory manual. The diagrams and part numbers are universal, so you can follow the assembly without knowing the language.

Can I use this manual to repair a standard road-legal Super Cub?

This document is for the competition-spec Eco Power Cub. Many assembly steps apply, but there are differences in electrical/lighting systems. The road Cub has a charging circuit, lights, and different wiring. For a road Cub, you need a Honda service manual for that specific year and model. Use this manual as a reference for engine and frame assembly, but don’t rely on it for road equipment. If you’re building a competition bike, this is the exact document you need.

What torque values are included?

The manual does not list dedicated torque tables. It specifies fastener sizes (e.g., BH8-30, WP8). Use a standard torque chart for those dimensions. An M8 bolt in steel typically requires 25-31 Nm (around 18-23 ft-lbs).

How many pages?

98 pages.

If you’re building or rebuilding a Honda Super Cub or Super Cub EX for competition, don’t guess. Get the factory documentation. Access the Factory Manual now.