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Oil Pump Rebuild Recommendations

06 Jul 2014 18:47
rt31973
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Oil Pump Rebuild Recommendations #1
I am looking for recommendations on when to rebuild my oil pump? Mine appears to be working fine and does not leak but I am concerned because it is the original pump in my 1973 RT3. My bike has 6,000 miles on it. I have replaced the hose to the engine, the hose to the oil tank and the banjo connection hose gaskets. Thank you for your suggestions.
Here are some pictures of my pump.








1973 RT3 360 x 2
“Happiness is an RT3 ride on a sunny day.”

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06 Jul 2014 19:15 06 Jul 2014 19:16 by MarkT.
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Oil Pump Rebuild Recommendations #2
Contact member DEET.... I can't think of any better source for oil pump rebuild or advice.

Even a NOS pump won't be as good as a DEET rebuild because after all these years the internal grease and seals on the NOS pump would be suspect.

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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06 Jul 2014 19:42
Makotosun
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Oil Pump Rebuild Recommendations #3
Agreed with MarkT - DEET is your man.

On the other hand, I am running either original or used pumps in all my enduros, without any issues. If there are no leaks and it is pumping well, it is probably still in good condition as the oil in the pump is the lube, and there really is not a lot of wear. The biggest problem is sitting, sitting with water in there, and sitting.

It is the old use it or lose it principle.

IF it isn't one thing, it's another.
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06 Jul 2014 19:44 21 May 2015 17:37 by Devin.
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Oil Pump Rebuild Recommendations #4
I haven't seen DEET make any posts here yet.
His email is This email address is being protected from spambots. You need JavaScript enabled to view it.


I am not sure if the RT and DT oil pumps are the same but I found a rebuild kit




www.hvccycle.com/vintage-yamaha-DT.html

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06 Jul 2014 19:47
Makotosun
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Oil Pump Rebuild Recommendations #5
DEET has not been converted yet. He has visited a couple of times but left no breadcrumbs. It will take a concerted effort to let him know his services are needed here :)

IF it isn't one thing, it's another.

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06 Jul 2014 20:01 06 Jul 2014 20:13 by Winterwoods.
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Oil Pump Rebuild Recommendations #6
Your pump looks to be in very good shape
from the outside, although there appears to be
some seepage on the inside of the white prime wheel(blue tint).

Was there oil-buildup along the bottom when you first took the case cover off?


Usually Dirt, Sand and Water will start the pumps to leaking, over time.

If it is not leaking, I would leave it alone.
(You don't see too many threads on Oil Pump Failures).

If you changed the hoses, prime it, add premix on the first tank
then check the hose into the side of the cylinder, to make sure
the pump is lifting oil.



c.winterwoods
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06 Jul 2014 20:41
TIKI
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Oil Pump Rebuild Recommendations #7

Winterwoods wrote:
If it is not leaking, I would leave it alone.
(You don't see too many threads on Oil Pump Failures).




Ditto, I rebuilt mine because it was leaking otherwise I would have not done a thing.

1976 Yamaha DT400C , 1973 Kawasaki Z1 900 , 1971 Suzuki TM-400R Cyclone
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07 Jul 2014 02:26
rt31973
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Oil Pump Rebuild Recommendations #8
This is a great forum. I really needed to hear all of the comments and recommendations. I am leaning to not rebuilding but I went ahead and looked up the parts I was previously told to use the diagram for a 1969 AT1E for the parts. Counting the 10% AMA discount, I can get most of the parts from Bike Bandit for $23 plus shipping of $9. However, it does not appear that a rebuild is needed. Thanks to everyone for the recommendations.

1973 RT3 360 x 2
“Happiness is an RT3 ride on a sunny day.”

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07 Jul 2014 09:43
Enduronut
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Oil Pump Rebuild Recommendations #9
.

Good call . . .

Unless the pump has been exposed to long periods on sunlight, water, or extreme heat, then there's no need to mess with it.
6000 miles is nothing for one of these pumps . . . I've seen them still working fine on street bikes with over 30K.

.

.

Control your thoughts . . . or your thoughts will control you!.
You can't accomplish . . . what you haven't dreamed!
Don't aim . . . and you'll hit your target every time!
A wise man knows . . . he isn't!
Failure squared . . . equals success!
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18 Sep 2020 14:25
MarkT
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Oil Pump Rebuild Recommendations #10
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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
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