Oil Pump Leak

I wanted to get the leak in the oil pump addressed this winter but time just always alluded me until this past weekend. I was able to get the pump removed and disassembled. The leak is coming from the shaft of the throttle actuated oil lettering part of the pump. 31 was the first and only year of the 101 to use this style pump. Before this the pumps not connected to the throttle cable in any way. If the motor needed more oil due to long intervals of high throttle usage then the rider would simply pump some oil into the crankcase with the hand pump. In 31 Indian wants to automate this and have the pump drip more oil into the case when under high throttle times. This did not work in practice as well as was hoped and in most of my research tiers with the 31 pump usually just disconnect the throttle cable and use the pump like the older ones. This is how I am running my 101. So the fact that I have a leak from a function I am not using is a little silly.

Here are some pictures of the pump removed from the bike and the throttle control portion disassembled. The shaft rides in a long bushing and this is where the leak is coming from. With this portion not being used the “fix” was pretty easy. I used a little RTV silicone around the shaft to seal the bushing. I then used the silicone around the nut and control arm to keep it in place so it will not move and break the seal. Now I have a pump that operates jut the way all the 101 scouts did up to 31. I did not change any of the settings with the main part of the pump so I am hoping that it will still be dialed in once it is back on the bike. It will be very important to watch the oil level as I run the bike over the next few rides and make any adjustments to keep the proper amount of oil in the crank case. I will reinstall the pump this weekend and should be good to go.