Just take the 1200 V4 Yamaha made, make it 1800 and you can have all the power you've got the nerve to twist the throttle for, and it fits, and it won't cost 2 arms and a leg. Remember those Mazda rotary engines? One thing I remember is small displacement, and was able to produce lots o power. Especially when you added turbo. Not real good on gas though.
most of those same magazines hold it in high regard in the 'bang for your buck' category because it will do almost as good as every other sports car that costs well over twice as much. they also rate it as that because it's freakin fun to slide a car through corners on sheer torque. you aren't going to turn good track times doing it but it's fun.
the same could be said for cruisers. they don't handle near as well as a sport bike but can be fun for rolling at 20 mph and, without clutching, smoke the back tire. it's about fun and whatever your version is works for me.
on a side note for the kpaul wannabe....
"A hiyabusa from 3k RPM (idle, basically) and up is producing 80 ft/lbs of torque. The myth that I4s are not "Torquey" is bull*****"
yes, it is but at your definition of 'idle' cruisers are halfway through the rev range and producing that much torque at half the rpms. we all know which is faster...but which is more fun on the street? that is subjective.
From what I have seen of Boss Hosses they do lurch a bit to the left at idle when you give it a good blip. It's a troque reaction to accelerating a heavy crank. That could be a problem in a tight left with stuff dragging on the ground. I dont think a 200CI V4 is gonna be in a sportbike anyway.
I bet if you watch the crank weight it wouldnt be a problem. For what I know those Hoss motors are straight out of your daddy's pickup with heavy cranks designed to keep the motor running smooth with all manner of accesories belted to it.
... of course you could mount it across the frame like a VF(R).
To start with, cutting each dimension by half produces an engine one-eighth the size of the original not one half the size. Furthermore reductions are never to scale. certain dimensions have to remain near constant for the sake of strength. Cutting the small block in half to create a V-4 would not even reduce the size in half, due to the flywheel, water pump, bearings supports. Nor would it reduce weight by half, for the same reasons. So basically, the entire line of reasoning is hopelessly flawed from the outset. Lastly, the Boss Hoss, with the whole thing in there is a pussycat to handle and control, so what's the point?