Posted April 22, 201015 yr I have a yamaha with a production sticker that shows manufactured in 08/72. The first three numbers on the engine are CT1. I have always assumed it was a CT2 but recently noticed the CT1 on the engine. Any idea which one it is so I can start getting a few parts? Thank you, Mick
April 23, 201015 yr Moderator On a 72 bike the designation CT1 or CT2 actually refers to the engine, CT1 has an engine with 5 transfer ports with no reeds and the CT2and CT3 has 7 with reeds. Although people used to fit the reedblock and carb from the 7 port engine. Its been on here a few times. Problem being they all start with CT1 for the 175 in the chassis/engine prefix as far as i'm aware up to around 75/76 so you need to look more closely at the actual engine/frame number. If you post the engine number, less the last 3 or 4 digits then we should be able to narrow it down for you. Oh and welcome to the mad house.....
April 24, 201015 yr Author The numbers are as follows: CT1-112928. I did see somewhere on google that a number starting with 1 was actually a CT3. Anyway, thanks for replying and for any help. I am only the 2nd owner and only 3300 miles. It's been sitting inside for over 30 years. Unfortunately gas was left in the tank and I'm having a ball getting it cleaned up. If you post the engine number, less the last 3 or 4 digits then we should be able to narrow it down for you.
April 24, 201015 yr Moderator The numbers are as follows: CT1-112928. I did see somewhere on google that a number starting with 1 was actually a CT3. Anyway, thanks for replying and for any help. I am only the 2nd owner and only 3300 miles. It's been sitting inside for over 30 years. Unfortunately gas was left in the tank and I'm having a ball getting it cleaned up. If you post the engine number, less the last 3 or 4 digits then we should be able to narrow it down for you. CT1-112928, ok Looking at this you could have a CT3 cant see them making 12000 of em though. I'll see if i can't track down some better details. CT1 Year: 1971 CT1-000101 CT1B Year: 1970 CT1-010101 CT1C Year: 1971 CT1-200101/CT1-032101 CT2 Year: 1972 CT1-065101 CT3 Year: 1973 CT1-100101
_33963e.png)
_83bc35.png)
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.