Are you searching for factory technical information? Here is where you will find the information you are looking for. Just click on the links below to download the documents. We recommend that you print and bind them for easy reference.

Factory Service Manuals

Honda CT90 K0 - K7 (1976) Factory Service Manual

Honda CT90 1977 - 1979 Factory Service Manual

Wiring Diagrams

CT90 K0 (before frame serial number 000001A)

CT90 K0 (after frame serial number 000001A)

CT90 Early General Diagram

CT90 Late General Diagram

CT90 K2 - K6

CT90 K8 (1977)

Tune-Up and Specifications

Honda CT90 K0 - K3 Inspection and Adjustment Guide

Honda CT90 K4 & Later Inspection and Adjustment Guide

Honda CT90 Manual Cam Chain Tensioner Instructions

Honda CT90 Specifications

Honda CT90 Service Data and Service Limits

Honda CT90 Torque Specifications

Addendums & Supplements

Honda CT90 K2 - K6 Supplement

Honda CT90 K8 (1977) Supplement

Honda CT90 1978 Emissions Addendum

Honda CT90 1979 Addendum