At first, I was not sure what you meant by is it a CT or CT2? The CT2 and CT3 are Yamaha designations from the 70's. Your question says you have a 1971 Honda Trail 90 so I started with our old microfiche deck and contacted a veteran of the
Honda Hoot.
Here is a little background information. Back before the 17 digit
VIN, a bike made in 1968 in Japan but sold in 1970 in the US was considered a 1970 and the serial number tags, put on in the US, reflected that.
During the late 1960s and though out the 1970s, many Honda bike model names ended with K# {K and a number} to indicate the
model edition. The first edition was a K0, the next a K1, and so on. But it did not necessarily mean year 1, year 2. For example the Trail 90 CT90K0 was sold from 1966 through 1968. Honda collectors have their own vernacular and may refer to different Trail 90's in shorthand. Saying the CT2 and meaning the CT90K2 model.
Check the
serial number (VIN) of your Trial 90 against the chart below.
| Honda Model Edition Code | Year and
Serial Numbers |
| CT90K0 | 1966-1968
serial number began CT90-100001 |
| CT90K1 | 1969
serial number began CT90-200001 |
| CT90K2 | 1970
serial number began CT90-300001 |
| CT90K3 | 1971
serial number began CT90-400001 |
| CT90K4 | 1972 – 1973
serial number began CT90-1400001 |
| CT90K5 | 1974
serial number began CT90-1500003 |
| CT90K6 | 1975
serial number began CT90-1600003 |
The abbreviations changed in 1976 to include the year instead of a K#. For example the 1976 Trail 90 was CT90'76. In 1981 they changed to the 17 digit VIN we know & love. I hope this answers your question.
