looking at some pictures from one
of Babbob's threads and thumbing thru the service manual. It looks pretty simple and reversible if you decide you don't want it there later. Page 4-11 of the service manual shows a flow chart of the oil system. We would want to located the cooler after the oil pump and before it starts branching out to the crank, clutch and cam shaft. So basically inline just before or after the oil filter. After the oil filter would be ideal but doesn't look practical.
The oil pump is behind that gear just above the curved channel (below and to the right of the clutch). It appears that the output of the oil pump fills this channel.
This channel is where the oil pressure test plug is. This plug could be removed and used for the oil out to the cooler. The channel in the clutch cover going to the oil filter would then have to be plugged. A hole could be drilled in the oil filter cover for the cooler return line.
I think this would work IF my understanding of the oil system is correct. I am slightly confused that in the flow chart it shows a pressure relief bypass of the oil filter. I could not find anything on this anywhere? Is this bypass built into the filter?
Does anyone know what the threads are on the oil pressure test port plug? Also anyone have info / resources for hoses and fittings etc?