Any repair for oil pumps?

O

OnDaTrail

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I was wondering if there is a way to repair an oil pump on the SX's or do you just have to bite the bullet and replace it with new, $220 in my case. Mine has taken to very high output, like 20:1 all of a sudden.
 
Yes, this is for my 2000 sx700r. It is adjusted to spec's in the service manual. I have not tried further adjustment because it was just fine, then all of a sudden increased oil usage. I did look over all of the cabling and everything looks in order so I'm assuming something changed with the pump. The sled has 2300 miles.
 
I pulled the plugs tonight and they are BLACK. They were always a nice light brown and dry. I think I'll have to replace the oil pump but it doesn't look like you can get the lower mounting screw off with the engine in??? Do you have to pull the engine to get it out on a 700 sxr?
 
I have a 99 sx with the same issue..I'm going to get a new one this summer, I'm almost sure you can take the carbs off and it will come out.....I don't see how you have to pull the motor to replace it....

Nick
 
I am shocked at the prognosis. The only sled I have ever had to replace the oil pump (or even ever heard of anyone replacing them because it was needed) on has been a yamaha.
 
Seen many high mileage oil pumps go full ratio. Common on high mileage Rotax rotary valve engines (the ones that made it that far). I have rebuilt a couple, but don't recommend it unless you are into precision part fabrication. You might take it apart very carefully to see what the issue is. Be sure that you can get a replacement first in case you send the parts flying and can't get them back together.
 
Nicko said:
I have a 99 sx with the same issue..I'm going to get a new one this summer, I'm almost sure you can take the carbs off and it will come out.....I don't see how you have to pull the motor to replace it....

Nick
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You would think that you could get it off, but the lower mounting screw is just opposite a motor mount. I worked on it for about an hour last night and will resume this evening. I think I need to make a custom allen wrench.
 
Seems like that screw is accessible with the right tool, but if you want you should be able to pull the engine bracket with 3 bolts. The engine shouldn't move unless you really yank on it, and you can simply replace them when done.'

Maybe take a pic and post so we can recall what it is like on that sled. I can't remember for sure.
 
Here are a couple of photo's. You can see that I've removed the arm for the oil pump cable. I can't get the lower pump screw out because the motor mount is in the way, and I can't get the motor mount out because the pump is in the way. I did get the upper pump mounting screw out.
IMG_1465.jpg

IMG_1466.jpg
 
Oil pumps have NOTHING to do with the brand of the machine! Oil pumps are made by manufactures such as Mikuni..... Just like carbs and fuel pumps either Mikuni or Keihin! That would be like blaming a carb or fuel pump failure as the fault of the sled maker!? You're better off just getting a new pump.
 
JohnnyQuest said:
Oil pumps have NOTHING to do with the brand of the machine! Oil pumps are made by manufactures such as Mikuni..... Just like carbs and fuel pumps either Mikuni or Keihin! That would be like blaming a carb or fuel pump failure as the fault of the sled maker!? You're better off just getting a new pump.
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I realize that. It just seems like yamahas go through more than other brands.
 
You can take the nut off the back side of that motor mount. It is up under the tunnel in front of the track. Very tight quarters, but doable. I have also taken the inside nut under the motor mount off, but can't remember which tool combination I used. Maybe a stubby box end wrench with another box end wrench hooked over the open end of the stubby for a lever.

Just looked at the pics again, and remember pulling an oil pump like that. It sure seems like I simply used a short allen wrench with my hands stuck down under the pump. I likely used an allen wrench that was ground off a bit. This is how I extend the life of allen wrenches when they get rounded, I simply grind them down until the rounded off part is removed.
 
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I got the pump off last night by cutting down the long end of an allen wrench and then turning the stub with pliers. My trusty tool worked valiantly to remove the screw and then went sailing down into the bowels of the machine just as it's job was done. I don't think I'll ever see that little wrench again, but he won't be forgotten.
 
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