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Take a peek, these are impressive powerplants.
http://motorcyclekitonline.com/MW%20CATALOG.htm
Agree'd. Those big Twins are awesome powerplants in a Custom.
One thing to keep in mind though is that a 160CI engine is 2600cc's. At 1300cc's per Cyl, they should be making a ton of power. Twins, especially Big Twins are very inefficient HP makers. There is too much time between the power strokes to make good HP considering their size.
To address the "my bike hits 240MPH" Harley rider...no way. MotoGP bikes are making 275+HP & are running 228+MPH. Besides an aftermarket engine removes the fact that it is a Harley because it no longer is one.
ZX-14 's, Hayabusa's & the like are a wind-tunnel designed bike. W/O a limiter they
may bump 200MPH with minor modifications. All motorcycles are a poor design aerodynamically as most cars have less wind-drag than even a sportbike. The ZX-11 was the speed-king at 185MPH pushing 133HP to the wheel. The 'Busa topped that with a best of 194MPH & took an additional 30RWHP & better aerodynamics to push the bike a mere 9MPH more.
A Cruiser is worse than a pick-up truck. When a bike starts hitting the 100MPH mark & above the Power-to-Weight ratio starts to drop & above 150MPH our 450lb sportbike becomes like a car. Suddenly 180HP is trying to move 3,000+lbs with wind-drag. A 180HP car will not get close to the 150MPH mark let alone 230MPH.
It doesn't matter how much Tq a harley makes it's still only a small abount of torque trying to move a 3,000+lb hunk of steel. My Ford Explorer V-6 makes 190lbs Tq & it won't go 240MPH. Top that with the small powerband of a Big-Twin & there is just no way.
I would like to add that I do have a special "fondness" of Custom Cruisers so I'm not bashing them. They're just not even close to the performance of todays In-line fours or our beloved V-4. The age-old comment of "There's to replacement for displacement" no longer applies when an engine 1/3 it's size can spin to 18,000RPM's & do it all day long.
I personally feel a V-4 is a great balance of the two designs.
RR