Hi Scott
I've been driving my HUP for 30+ years with the original 216 as installed in 1945 the engine had never been apart until this year. See
http://www.canadianmilitarypattern.c...AUL%202011.htm for explanation of why it is apart now.
Take a look at the engine pages on my web page to get a little more understanding of the 216 splash lubrication system.
The only real draw back is that the engine system was designed 70 years ago when road speeds were lower. Most of the problems people have had with the 216 is when they try to drive it at high speed 50 MPH and higher for long periods of time.
The other problem is the 84 hp is ok hauling a C15 around but has a little more trouble hauling C60 on the road, modern traffic doesn't understand that truck slow down on hills. Having said that I've never been on a trail ride that my HUP or C60L with the 216 they could not climb anything a jeep could climb they just do it slower.
Cheers