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TOPIC: Throttle "cylinder" dissasembly?

Throttle "cylinder" dissasembly? 28 Jun 2019 16:17 #1

  • bestep
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I've searched diagrams, service manuals, etc. and can't find anything. I am replacing the gripside cable on a 1975 Yamaha Dt175: how do you separate the cable junction where the grip side connects to the carbside and the autoluber? I cannot seem to remove the junction from the cylinder?

Thanks!
Brian

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Last Edit: by bestep.

Throttle "cylinder" dissasembly? 28 Jun 2019 17:20 #2

  • RT325
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Disconnect the cable from the throttle slide & the oil pump then that will give you enough to pop the top off the junction box where the top cable goes in & you can pull the internal thingy out the top enough to flick the cables off of the joining slider. & good luck with that but should be straight forward/ Only two cables. The fun with three cables on twin cylinder bikes with oil pump you can get them crossed over if not careful.
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Throttle "cylinder" dissasembly? 29 Jun 2019 11:58 #3

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Thanks! I forgot to add in to my question that I was trying to avoid removing the other cable ends. But, I really don't think it's possibly to not remove them. There simply isn't enough slack in the lines.

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Throttle "cylinder" dissasembly? 29 Jun 2019 13:50 #4

  • Mothersbaugh
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Correct. You don't want it coming apart at speed out on the road.
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Throttle "cylinder" dissasembly? 29 Jun 2019 15:42 #5

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You have to disconnect from throttle slide & oil pump as i said, to get enough slack to get it apart at the junction box.

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Throttle "cylinder" dissasembly? 17 Jul 2019 05:54 #6

  • Claes
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Hi everyone, I have had he same issue on my DT 250 from 1976. A previous owner had replaced the original inner cable by a long single wire from the throttle to the carburator (and disconnected the oil pump wire). Took me a while to realise, as you cannot open the "cable cylinder"). I have managed to buy the upper part of the wire from Yamaha in Amsterdam (I am in Europe) but the lower part is apparently out of stock. I did find this one below on eBay but I wonder if the end nipple will fit? From looking at the little thingie inside my carburator it seems to require the other type of nipple (the type for the oil pump - pls see link), but I do not know. Any views? Please see link to eBay below. I do not know the previous owners at all, so have no idea what has been done to the bike in the last 43 years.

Any help much appreciated!

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Throttle "cylinder" dissasembly? 17 Jul 2019 07:00 #7

  • Gr8uncleal
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Good afternoon from Brexitland Claes!

I believe that you are correct.

According to CMSNL, the top half of the throttle cable assembly that you show will fit your bike, but the bottom half won't. The bottom half for the 1975 and 1976 DT250 (B & C) is not shared with any other models.
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Throttle "cylinder" dissasembly? 17 Jul 2019 07:30 #8

  • MarkT
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I'd contact members DEET or Enduronut and see if they have the cable you need.

(DEET also makes cables.)

I believe HVC Cycle here in the USA sells a complete reproduction cable members have used.

hvccycle.net/yamaha-dt250-dt360-dt400-th...-cable-437-26311-02/

.
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1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250

Throttle "cylinder" dissasembly? 18 Jul 2019 02:53 #9

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Many thanks for your response. I might just replace the long wire with a new one and keep the oil pump out of commission, at least as a temporary measure. I have one of those repair set where you screw on a nipple. Not sure how long those last though...

Claes

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Throttle "cylinder" dissasembly? 18 Jul 2019 02:59 #10

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Thank you for the tip. The cable in the link you sent looks wonderful (and ok price too) but I fear Alan (Gr8uncleal) is right, that the bottom part has the wrong kind of nipple for my carburetor. I could not find the manual in the Tech librarary - seems to be one for every year except mine!

cheers
Claes

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