Jump to content

CT1 info


Recommended Posts

Do you want an ad-free experience? Join today and help support the Yamaha Owners Club.

Hi All,

have just started on a restoration of an old ct1? 175 . How can i identify the year model etc for parts and colour scheme etc Is there an web based repositories of info?

Do you figure that it is a CT1 from the engine code? CT1 was used as the start of engine codes from 1969 to 1973 I believe, even though in those years, the models were CT1, CT1B, CT1C, CT2 and finally CT3 in 1973. Here's a modification of a chart I found on the net,

CT1 Year: 1969 Start Engine#: CT1-000101

CT1B Year: 1970 Start Engine#: CT1-010101

CT1C Year: 1971 Start Engine#: CT1-200101/ A confused year. Two separate sets of engine codes. The first set was for non-reed valve engines I believe.

At some mid year point, the engine codes changed dramatically - this could be when reed valves were introduced (but just a guess on my part). At that point the codes begin with CT1-032101

CT2 Year: 1972 Start Engine#: CT1-065101 (definitely reed valve engines)

CT3 Year: 1973 Start Engine#: CT1-100101 (reed valves, gold tanks, grey/black fenders like mine)

Beginning in 1974, the engines didn't start with CT1 any longer, so you're probably earlier than that.

There is a surprising amount of parts available for these. Good Luck.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...