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TOPIC: Picked up a 74 DT360 recently, have some questions about fixing

Picked up a 74 DT360 recently, have some questions about fixing 18 Nov 2017 11:26 #1

  • Zozr
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I was very glad to find this active forum existed, I picked up a 74 DT360 as a winter project and have some questions about fixing it up.

I have the rear brake steel "cable" and the splined lever that attaches to the drum, but I am in need of the piece that connects these two things together. Similar to shown here:https://imgur.com/a/EUOPC. I have attached an image to show what I am looking for, the piece that the speech bubble is pointing to.

I also can not get the float bowl off the carb. Not sure why it is so stuck but working on that. The engine is not currently running but not anticipating it will be too much work to get going. The pump was deleted by an owner in the past, but I have a spare engine that has the pump. (no current plan to run it on the pump again, I will just be doing a premix for now). Any suggestions on what ratio?

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Last Edit: by Zozr.

Picked up a 74 DT360 recently, have some questions about fixing 18 Nov 2017 12:55 #2

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welcome to the forum,
the piece missing, here is the part number, dealer should be able to get it for you, or eBay, 90240-06006-00
And the carb, with all screws out and if you have the original carb, there is an o-ring thats probably holding it up, Lightly pry with a small screw driver, should come apart.
#4 o-ring part is probably the culprit.

www.rosevillemotorsportsparts.com/oempar...9bc7849cc/carburetor

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Thanks Mark
Roseville, Ca.

'76 Bultaco 143 Frontera
07 DL650
74 DT360
75 Norton
73 CB500K
63 C200
87 PW50
64 McClane Edger

Picked up a 74 DT360 recently, have some questions about fixing 18 Nov 2017 16:53 #3

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mdscott wrote: welcome to the forum,
the piece missing, here is the part number, dealer should be able to get it for you, or eBay, 90240-06006-00
And the carb, with all screws out and if you have the original carb, there is an o-ring thats probably holding it up, Lightly pry with a small screw driver, should come apart.
#4 o-ring part is probably the culprit.

www.rosevillemotorsportsparts.com/oempar...9bc7849cc/carburetor


Thanks! I looked up the part number and the hole the bar goes through seems so small, but the cable seems way bigger than that? Am I missing something with how it works?

As for the float bowl, are there not only 4 screws holding the float bowl on? I do believe it is original. I got it a little loose but it still feels like something is holding on.

I took a look at the tech section of this site, looking for a service manual for a 74 DT360 and didn't see one, although for some reason I can't view page 3, it takes me to a weird page.

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Picked up a 74 DT360 recently, have some questions about fixing 18 Nov 2017 17:15 #4

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Opps, this should be it, 90249-12008-00,
You can try lightly tapping on carb with a rubber hammer where the drain pug is. That worked for me, my DT360 carb was slightly stuck also.
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Thanks Mark
Roseville, Ca.

'76 Bultaco 143 Frontera
07 DL650
74 DT360
75 Norton
73 CB500K
63 C200
87 PW50
64 McClane Edger

Picked up a 74 DT360 recently, have some questions about fixing 18 Nov 2017 18:26 #5

  • Makotosun
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Zozr wrote:

mdscott wrote: welcome to the forum,
the piece missing, here is the part number, dealer should be able to get it for you, or eBay, 90240-06006-00
And the carb, with all screws out and if you have the original carb, there is an o-ring thats probably holding it up, Lightly pry with a small screw driver, should come apart.
#4 o-ring part is probably the culprit.

www.rosevillemotorsportsparts.com/oempar...9bc7849cc/carburetor


Thanks! I looked up the part number and the hole the bar goes through seems so small, but the cable seems way bigger than that? Am I missing something with how it works?

As for the float bowl, are there not only 4 screws holding the float bowl on? I do believe it is original. I got it a little loose but it still feels like something is holding on.

I took a look at the tech section of this site, looking for a service manual for a 74 DT360 and didn't see one, although for some reason I can't view page 3, it takes me to a weird page.


Here is a link to the service manual. The sort order is off - I will get that fixed.

yamaha-enduros.com/index.php/workshop/se...ctory-service-manual
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No Good Story ever started with a Salad . . .

Picked up a 74 DT360 recently, have some questions about fixing 18 Nov 2017 18:34 #6

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Excellent. Much appreciated. I like having a manual on my computer to quickly look things up.

And that part looks much better :) I will look into ordering that asap. I do want to get it running before I start investing in lots of misc parts.

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Picked up a 74 DT360 recently, have some questions about fixing 18 Nov 2017 20:11 #7

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Post some pictures

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Thanks Mark
Roseville, Ca.

'76 Bultaco 143 Frontera
07 DL650
74 DT360
75 Norton
73 CB500K
63 C200
87 PW50
64 McClane Edger

Picked up a 74 DT360 recently, have some questions about fixing 18 Nov 2017 20:14 #8

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I will take some tomorrow and post them! It is a little dirty though :cheer:

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Picked up a 74 DT360 recently, have some questions about fixing 19 Nov 2017 05:14 #9

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Try putting that float bowl in some boiling water for just a minute .....It has worked in the past for other carb parts (stuck slides)

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Picked up a 74 DT360 recently, have some questions about fixing 19 Nov 2017 06:16 #10

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The chances are better than 50% that at one time the float bowl leaked.

With that being said there probably is a light coat of Permetex sealer that is holding it together. I lightly tapped on the bolt ( rubber mallet ) at the bottom and it came loose. Again, very hot water or an acetone bath. Most of the time they don't give you that much trouble. Plan on the float pin being stubborn as well.

asco

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