TETO, I guess. I prefer my big motors liquid cooled. As for lean and the Bonnie/cruiser, I have both a Bonnie and a R3. I drag the R3 often but by hanging off a bit, and it can be done without much fanfare, I can turn the beast much more sharply if needed.
For those who think a cruiser cannot be hustled around with most other bikes I invite you to attend the next Bennington Bash and watch my bud Jim on his R3 with a car tire hang for 300 miles with the Speed 3, Street 3, and Daytona riders.
It's always the same-bikes, sleds, dirt, whatever. It's the rider. We have a guy around here with a hopped-up 1800 VTX that smokes the Ducati hot-shoes on a regular basis.
Back to Bennington, there are a WHOLE bunch of guys who could NOT believe the R3 stayed with them all day. I'm quick and they lost me, all of them, in 10 miles!
I recall a trail ride on sleds in Mi several winters ago with a pro Ski-Doo racer on a 440 when we all had much bigger iron-at LEAST 20mph on him top end. NOBODY could get within a country mile of this guy after 15 minutes of wooded trails that included some wide open areas where the HP came into play.
Lean angle on the street never seems to slow the really skilled riders I know-the R3 and VTX remind me of that often! I need another track day for sure. Just my own 2 cents.