Last week I had a new oil cooler install for a tech article for American Iron Magazine. The cooler was from Oil Bud which is basically heat sink plate/ heat exchanger that mounts under the motor between the frame rails. Installation needed more than one person at times but was fairly straight forward. We did a bunch of runs/tests to get temps for the heads and oil before the installation with the stock oil cooler. After the install we redid the runs and checked the temps - each run showed about 35F degree drop on the oil temps and the heads ran almost as cool.
Since it is a heat sink, the cooler works also at idle with no air flow. On the initial set of tests, at idle the rear head would cut out after about 3 minutes, with the new cooler it took 11 minutes before the rear shut down. As an extra test, we ran the Lenale fan ihave installed with the new cooler at idle and it took almost 15 minutes before the rear shut down. With everyone looking for ways to get their bike engines to run cooler, I was pretty impressed with this addition to my bike. Glad I did it as a tech article, because buying this cooler will set you back about $650, but if heat really bothers you it might be worth the cost. Not sure what month the article will be posted in, but I would guess in the next 2-3months (average time from writing to pulication).