DT360 Questions

[89nx125]

Ok, so I just traded for a bike that I was told was a 1979 DT360. As far as I can tell, DT360s weren't made that year. Could anyone help identify it? The number on the frame is 446-012298.
Edit: found this a few posts down, 1974 DT360A

I also need a new carb, throttle and clutch cables. The cables I couldn't find for a DT360, but I can get some for a MX360, I'm assuming the two models are similar enough to use these. Carb-wise, is it possible to find out if a carb from another bike is interchangable, because I can't seem to find any for this model. Thanks for the help

 

[digifox]

DT used a rotary intake right?
as did the MX(i know) so they should be the same, since all the other engine parts on DT/MX are interchangeable

 

[89nx125]

I don't know what you mean by a rotary intake, but I haven't gone too deep into the motor yet.

 

[digifox]

is the carb. on the right side of the engine under a metal cover?(Rotary valve)
Or is it on the cylinder in clear view?(Reed valves)

 

[dirt bike dave]

I don't think any of the big Yamaha's had rotary intakes. Rotary valves were common on the little Suzukis and Kawasakis (as well as Can Ams). I know the little Yamaha 60 had a rotary valve, but not the 360.

FWIW, Yamaha was one of the first makers that made reed valves common on their bikes, in 1972. Many other makers did not have reed valves until the mid '70s.

As for cables and carb swaps, the other 360 Yamahas could work, but you might also look to the early DT400's ('75 and '76) as well as early DT250's, the SC500 and the RT2. These bikes had similar motors and twin shock frames. The DT400 and 250 got a major makeover and monoshock frames in '77.

Below is a '75 DT400

 

[89nx125]

Thanks, I'll look into that.
BTW, the bike has reed valves, no rotary intake

 

[89nx125]

Another quick question, what weight oil do I use in the transmission?

 

[dirt bike dave]

Most 2 stroke transmissions are not very picky at all. 10w40 should serve you well, and I would not be surprised if that was what was specified back in the day.

 

[89nx125]

Awesome, thanks for the help

 

[JunkmanDT250]

DT360A Year: 1974 Start Engine#: 446-000101