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What's the easiest way to tell the difference between 1973 ct3 175 and 1973 dt75?

Hi

Other than the frame/engine no. I think the CT3 exhaust runs along the left (oops I meant right) side of the bike and the DT has an exhaust that crosses over the top of the cylinder head

  • Moderator

Tricky. Why do you need to know.

  • Author

I'm restoring it so ordering parts is an issue

Dvla say it's a dt175

I believe it to be a ct3

The frame and engine start with ct1

  • Moderator

As in CT1-300004 onwards if so its a Dt, otherwise its a CT.

  • Author

Hi

Fair play your right with the engine number mine is after what you quoted

How do you know that please?

When I look at the battery tray it's the small for 3 cell 6v battery like the ct3

Dt175 has a longer battery 6 cell?

  • Author

Hi

Just had an email from a bike shop

My engine number starts with CT1-300 8

Here is the relevant section from the Yamaha frame code book:

CT1    000101-          251    CT1    69

CT1    303101-310000    458    DT175    74

CT1    310101-400000    458    DT175    75

So my bike is a CT3?

  • Moderator

From what i know the Dt came into being proper early 73.

That number kicks off the 73 bikes although things weren't definite back then to say the least.

The bikes are pretty much the same, only really obvious switch was the tailpipe swapping sides. With some having a different tank shape.

A pic would help a lot.

Check the FAQ section for help posting pics too. You'll have to upload them to photobucket first. :)

No worries! Glad you got it sorted. :) Looks like a great bike. Not the first time (and likely not the last) that I'll say it, but I love the look of these classic bikes.

  • Moderator

I'm going with CT due to what looks in the photo the 18"front wheel.

Uk dt models have a 21.

  • Moderator

Then its a Dt.

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