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There have been several threads on here talking about the BDX oil delete. Some people feel that crank issues have been caused by the oil delete and some people have had many trouble free miles. I had an opportunity in get inside a 2008 M1000 motor this last weekend and thought that I would share my findings and some pictures that would help people decide if the oil delete was right for them.
A quick note before I start, this motor did not have an oil delete when we started and was not torn down because of any issues with an oil delete.
This is a picture of the bottom of the crankcase, looking at it from the rear(opposite of where the oil pump would go). The hole in the middle of the case is where the stock oil pump injects oil directly into the case. When using the BDX oil delete, they give you a screw to plug this hole when you remove the oil pump.
And a closer picture, center right is where the plug goes.
If you look at the other side of the case with the crank removed, you will see that the hole I previously mentioned is under the shaft that operates the water pump.
You can also see in the above picture where the 4 crank bearings sit, and the water pump shaft is directly between the middle 2 bearings. Here is a picture with the crank sitting in the case.
This is a picture of the top of the case, you can see there there is no passage for fluid to pass from the outside of the inner crank bearings to the inside. The transfer ports you see are on the outside of the seal and only provide oil to the crank bearings. The two lines you see between the ports are where the seal rests.
As far as the 4 crank bearings go, there is no difference in the amount of oil they receive in an oil injected motor or a premixed motor. The oil is injected behind the throttle bodies and the oil gas mix is then brought into the case. This is the same thing that happens in an premixed motor, the fuel/oil is just mixed earlier. You can see in the picture with the crank in the case that the oil injected into the case underneath the water pump shaft can not exit that cavity to get to any of the crank bearings. The inter bearings have a shield that is not ported. So the 4 crank bearing are not the issue with the oil delete.
However, because the oil injected in the case can not escape the cavity to lube the crank bearings, the opposite is true of the premix getting to the water pump shaft. When you remove the pump, the water pump bearings receive no lubrication from the premixed fuel. There are a couple of solutions to this problem, one is to install a line to the hole where the oil injection used to inject oil in the case and manually inject oil in there every few rides, or you can drill the case and install a line to provide an oil/gas mix to the water pump shaft. BDX uses an injected bushing on the delete kit that they supply so one end of the pump shaft is okay, but the other end that goes through the case is where the problem lies. We decided to drill the case, I'll show pictures of how that was done in case someone is wanting to do there's this way.
We used these parts off the old oil pump. The brass fitting connected to the hose is a one way valve with an arrow showing the direction of fluid travel.
Now back to the bottom of the case, we center punched the post in the middle of the picture.
We then drilled and tapped a hole for the end of the hose with the one way valve.
After that, all that's left is to install the hose between the new hole you tapped and the stock oil injection hole. Make sure that the arrow on the brass one way valve points toward the water pump. Cut your hose to fit and put it together. This will allow mixed oil to reach the bearing in the water pump shaft.
Finished product.
Some of the shaft bearings are failing and some are not. I think this has a lot to do with when you did your oil delete. When we took this motor apart there was a small amount of oil in between the inner bearings. The oil was there from the stock oil pump. If you do your delete and don't drill the case then you probably won't have an issue for several rides until the oil that the oil pump put in the case is depleted and the bearing runs dry. If you do an oil delete on a new motor that hasn't been run and don't drill the case, without a doubt you will experience issues much sooner than someone doing it on an old motor. Hope this helps. Any other input or theory's are welcome, just please try to keep it somewhat civil.
A quick note before I start, this motor did not have an oil delete when we started and was not torn down because of any issues with an oil delete.
This is a picture of the bottom of the crankcase, looking at it from the rear(opposite of where the oil pump would go). The hole in the middle of the case is where the stock oil pump injects oil directly into the case. When using the BDX oil delete, they give you a screw to plug this hole when you remove the oil pump.
And a closer picture, center right is where the plug goes.
If you look at the other side of the case with the crank removed, you will see that the hole I previously mentioned is under the shaft that operates the water pump.
You can also see in the above picture where the 4 crank bearings sit, and the water pump shaft is directly between the middle 2 bearings. Here is a picture with the crank sitting in the case.
This is a picture of the top of the case, you can see there there is no passage for fluid to pass from the outside of the inner crank bearings to the inside. The transfer ports you see are on the outside of the seal and only provide oil to the crank bearings. The two lines you see between the ports are where the seal rests.
As far as the 4 crank bearings go, there is no difference in the amount of oil they receive in an oil injected motor or a premixed motor. The oil is injected behind the throttle bodies and the oil gas mix is then brought into the case. This is the same thing that happens in an premixed motor, the fuel/oil is just mixed earlier. You can see in the picture with the crank in the case that the oil injected into the case underneath the water pump shaft can not exit that cavity to get to any of the crank bearings. The inter bearings have a shield that is not ported. So the 4 crank bearing are not the issue with the oil delete.
However, because the oil injected in the case can not escape the cavity to lube the crank bearings, the opposite is true of the premix getting to the water pump shaft. When you remove the pump, the water pump bearings receive no lubrication from the premixed fuel. There are a couple of solutions to this problem, one is to install a line to the hole where the oil injection used to inject oil in the case and manually inject oil in there every few rides, or you can drill the case and install a line to provide an oil/gas mix to the water pump shaft. BDX uses an injected bushing on the delete kit that they supply so one end of the pump shaft is okay, but the other end that goes through the case is where the problem lies. We decided to drill the case, I'll show pictures of how that was done in case someone is wanting to do there's this way.
We used these parts off the old oil pump. The brass fitting connected to the hose is a one way valve with an arrow showing the direction of fluid travel.
Now back to the bottom of the case, we center punched the post in the middle of the picture.
We then drilled and tapped a hole for the end of the hose with the one way valve.
After that, all that's left is to install the hose between the new hole you tapped and the stock oil injection hole. Make sure that the arrow on the brass one way valve points toward the water pump. Cut your hose to fit and put it together. This will allow mixed oil to reach the bearing in the water pump shaft.
Finished product.
Some of the shaft bearings are failing and some are not. I think this has a lot to do with when you did your oil delete. When we took this motor apart there was a small amount of oil in between the inner bearings. The oil was there from the stock oil pump. If you do your delete and don't drill the case then you probably won't have an issue for several rides until the oil that the oil pump put in the case is depleted and the bearing runs dry. If you do an oil delete on a new motor that hasn't been run and don't drill the case, without a doubt you will experience issues much sooner than someone doing it on an old motor. Hope this helps. Any other input or theory's are welcome, just please try to keep it somewhat civil.
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