Hi, does anyone have the following information?
I'm after the Yamaha part number for a Clutch cable, and if possible, the inner and outer cable lengths.
I'm also trying to source a wiring diagram, preferably in colour, but a diagram with a note of the cable colours would work. Every wiring diagram I have found, makes no mention of cable colours ☹️
Hope someone can help.
Atb, Phil.

Did you check out CMSNL and/or Partzilla? Link to CMSNL for clutch cable attached.

Yamaha DT250 1974 USA HANDLE - WIRE - buy original HANDLE - WIRE spares online (cmsnl.com)

If it is JUST wire colours vs function that you need, then any Yamaha wiring diagram of that era, and a few years later, will provide that info. As per the other manufacturers, virtually every colour was the same across the model range for a particular function - eg horn wires are one pink and one brown.

Partzilla shows 363-26335-03-00 as the clutch cable and it's in stock, so you should be able to get it from your local Yamaha dealer. Hopefully someone else can answer the rest of your questions.

www.partzilla.com/product/yamaha/363-263...75e961492a735516383b

"Partzilla shows 363-26335-03-00 as the clutch cable and it's in stock, so you should be able to get it from your local Yamaha dealer. Hopefully someone else can answer the rest of your questions."

I think that Partzilla, unusually, are wrong. The cable for the 1974 DT250A and DT360A was a one year only part. However, if you are prepared to change the routing of the cable slightly, it can work.

I just rewired a 1974 DT360A using the 1975 DT400B COLOR wiring diagram from the Tech Library->Wiring Diagrams.

There are some differences I'll mention, but if you look over the years, most of the wiring diagrams are almost identical w/the 2 position switch.

One difference is brake light wire color. In the headlight bucket, the brake light is a G/Y wire. The schematic shows Y/W. This wire is routed to the rear brake light switch as a G/Y, connected together with a Y that supplies power directly to the brake light.

Obviously you have points. Guessing that is just a ground breaker loop to the coil.

Hi, thank you for the reply and information. I'll download that wiring diagram, and add your notes to it. 
Atb, Phil.

Hi all, I think I have found the correct clutch cable at "Yambits" in the UK. If it fits correctly, I will publish the inner and outer lengths, and part number. 
Atb, Phil