Transmission gear bushing with oil hole

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1/12/2018 1:58 PM

This may be a minor detail, but since I've invested thousands into this motor I am being meticulous with all of the details. This question is not addressed at all in my service manual, I've checked. The bike in reference here is a 2014 KX250F.

The input transmission shaft on this bike has an small oil passage hole drilled into the shaft where 4th gear would be. In addition to this hole, there is a small oil hole drilled into the bushing that the fourth gear sits on. My question is how to orient this bushing with the hole in relation to the hole in the shaft. Does it matter?

The hole in the bushing cannot line up directly over the hole in the shaft, due to the splines. Should the hole in the bushing be close to the hole in the shaft, or perhaps opposite of each other?

Any advice from the experts here? Thanks in advance.

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1/12/2018 1:59 PM

Photo

Photo

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1/12/2018 4:58 PM

The transmission diagram has it showing facing the same direction as the hole but I don't know if its supposed to be aligned.

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1/13/2018 5:23 AM

Have you tried turning the bushing around? The hole might be 1/2 spine off one way and work if you turn the bushing around.

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1/13/2018 11:22 AM

Hondas4Life3 wrote:

The transmission diagram has it showing facing the same direction as the hole but I don't know if its supposed to be aligned.

I noticed that as well. I haven’t sealed the cases up yet but thats the way I left the bushing. Even if I flip the bushing around, the holes are off by a half spline. Photo

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1/14/2018 11:28 PM

In my experience and from what I'm told the holes are suppose to align.

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