I'm working on a test where a lab will test the used oil of both a car formula and an MA2. Will be 2 or 3 months for the results. Obviously several runs would be more representative, but we will have one with the car oil and then one with the motorcycle. We will look at wear particles.

Thanks for getting back to me. 

I came into this thinking that your suggestion was a pretty good idea. It absolutely performs worse than the previous Castrol 10W40.

My parts supplier knows the Motul rep and they had been thinking the same thing. I am glad I tried it. Since you recommend this oil on this and other forums I thought I would mention my experience. 

The MA2 oil is not the cause of any slippage, and can solve many slippage problems if they are not due to wear. No oil can fix the wear nor adjust the bands if there are problems.

A normal car oil is much more slippery.

I'm not sure where you got your MA2 oil, but a good MA2 oil is only $1 per gallon more than an SN car oil.

I have a late MPI engine'd but low compression SPI with the AP automatic. It has 63000 km on it. While not exactly new, I thought it was pretty tight. When hot, I can notice some slippage, especially going into fourth, it is easily avoided by just being light on the throttle during the change. I just changed the oil and went to an MA2 4 stroke motorcycle oil, and for the first 50km I am totally not impressed. With the oil barely warm, 128°F, there is a lot of slippage even just pulling away from a light.

I will put a few more miles on this, but I am pretty sure that spendy motorcycle oil is going to get dumped out and cheapo 10W40 or 20W50 is going in. If it was close to rebuild time, it got much closer this afternoon.

Your thoughts?