We've found some original Honda Shop Manuals that are on-line.
1966 - 1977, CT90, S90, C90, CD90, CL90, CL90L Honda Shop Manual.
In the early years, Honda used to "bundle" similar models of motorcycles together in one shop manual. The above manual was published in early 1977 and was the last of the bundled shop manuals to include the CT90. The following years had a dedicated shop manual just for the CT. This is an Adobe Acrobat PDF documents of 179 pages. If you have a slow internet connection, it may take a long time to download and open on your screen. I'd recommend that once you open it up, look to see if you can save it to your hard drive.
1977 - 1982, CT 90 & CT110 Honda Shop Manual.
Two different locations for the same Honda Shop Manual. These are Adobe Acrobat PDF documents of 200 pages. If you have a slow internet connection, it may take a long time to download and open on your screen. I'd recommend that once you open it up, look to see if you can save it to your hard drive.
