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Oil pump advice required 1974 DT250

  • MrBernzo
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Replied by MrBernzo on topic Oil pump advice required 1974 DT250

I wasn't able to make any progress with the pump. Kept leaking form the Shaft. I managed to track down another pump and it's on it way to me now.
I pulled this one down to see if I can rebuild it. There was a bit of crap inside but overall clean. Looks like the tiny seal in the pump spindle is the leaky one.
Going to order a rebuild kit and see if I can get this one running again.
15 Oct 2020 23:41 #21

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Replied by MarkT on topic Oil pump advice required 1974 DT250

You can buy the seals from Yamaha.
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
16 Oct 2020 04:07 #22

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Replied by MrBernzo on topic Re:Oil pump advice required 1974 DT250

I have struggled to find part numbers for the seals through Yamaha, particularly the small seal.


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16 Oct 2020 04:34 #23

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Replied by MarkT on topic Oil pump advice required 1974 DT250

Here is the parts list I have:

Small internal driveshaft seal: 93104-06108-00-00
Primer end seal: 93101-10090-00-00
Pump seal : 93104-14059-00-00
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
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16 Oct 2020 04:45 #24

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Replied by Wessi on topic Oil pump advice required 1974 DT250


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Replied by Gr8uncleal on topic Oil pump advice required 1974 DT250

If anyone is interested, Simply Bearings is one of the "go to" companies in the UK for seals, bearings etc.
18 Oct 2020 05:40 #26

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Replied by MrBernzo on topic Oil pump advice required 1974 DT250


Sensational! I have been looking for these part numbers. I searched the numbers on my local dealers website and it shows all parts as available in Australia. All up $42 for the seals and gasket.
Thanks Mark.
19 Oct 2020 04:43 #27

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Replied by MrBernzo on topic Oil pump advice required 1974 DT250


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