My daughter runs yamaha jr. at the gopro motorplex and we also use the Horstman HDC-5B. I use WD40 I know alot of people use triflow but wd40 is cheap and I use alot of it. Everytime she comes off the track I will soak the drum/crank down and I have never had a clutch slip or failures using it. I found that it is also one of the best cleaners to remove all the oil debri after the race. Do yourself a favor and buy a 1 gallon can and a spray bottle much cheaper then the aresal cans.