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TOPIC: DT250 Autolube tutorial

DT250 Autolube tutorial 06 Apr 2019 07:06 #11

  • PDXtyist
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Superb tutorial. Excellent explanation debunking the a/l pump.
One thing I can’t seem to find in any manuals:
Adding shims gives more or less oil?
What are some nominal differences in size of shim vs. change in oil delivery ?

I hope you also can provide more videos like this on other misunderstandings on our Yamaha 2strokes.
Thanks.

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Last Edit: by PDXtyist.

DT250 Autolube tutorial 06 Apr 2019 09:30 #12

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Fellows. Per the excellent video, I looked at my TY250A’s autolube pump for adjustments. I noticed that there was no raised boss on mine to measure the .2-.25mm gap. It looks as if it’s been completely worn out or filed down?????
Not to mention that a roller pin was inserted as a pin to set adjustment.
The bike has been running well perhaps a bit too much smoke but no other issues.
I am also thinking about a rebuild kit for it.
Any issues?
Thanks.
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Last Edit: by PDXtyist.

DT250 Autolube tutorial 06 Apr 2019 20:29 #13

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I hate to say it, but your post indicates that you either don't understand how the pump works or you have been misled on how to adjust it.
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DT250 Autolube tutorial 06 Apr 2019 22:05 #14

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Not all of us are experts. Sorry for not being clear.
My son and I are trying to learn as we go. The part we are grappling withand don’t understand is how one does The “Minimum Stroke Check Adjustment”
1) We have the pump adjust plate out at max limit
2) When it comes to measuring the gap between “raised boss” and pulley adjust plate: our bike has no raised boss (seen in our manuals)on adjust pulley to properly measure from.
That is what we are trying to figure out.

We did find the plunger pin out of adjustment away from its mark. Fixed by adjustment of pump cable.
Trying to learn and master the tasks of our hobby.

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DT250 Autolube tutorial 07 Apr 2019 04:01 #15

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The boss is clearly shown in your photo.




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Yamaha@nc.rr.com

Where the Yamaha Enduro is still a current model...

DT250 Autolube tutorial 07 Apr 2019 04:06 #16

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The roller pin has nothing to do with the adjustment. It is installed in its proper location.

It provides a stop so the pulley can be forced down when the cable is pulled.

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DT250 Autolube tutorial 07 Apr 2019 09:11 #17

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Ok. Just seems like the boss is really worn down. I have an another old pump spare and it’s boss is larger in comparison. I guess shims will need to make up for the this if I am not mistaken.

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DT250 Autolube tutorial 07 Apr 2019 11:35 #18

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That is correct.

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DT250 Autolube tutorial 09 Apr 2019 10:19 #19

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Great video, answered a lot of questions for me. Even though po checked it I think I will run through process just for peace of mind. Thanks

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DT250 Autolube tutorial 10 Jun 2019 22:18 #20

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Just came across this video today and thought it was great. I was sure that it would be on this site and sure enough, after using the forum search feature, here it is. I am bumping it with this reply so anyone new in the last few months can watch it.

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