cosmicsunset
+1y
While adding a turbo is a lot less drastic, this reminds me of an article I read about boring out motorcycle cylinders to increase the engine capacity and supposedly power output. However, it doesn't work.
If you bore the cylinders and upsize the pistons then your intake and exhaust ports will be undersized so if you really want more power you need to machine those out to be a little bigger and replace all the valves. Now your intake system is undersized so the engine is starved for oxygen unless you replace all that and/or add a blower (and/or nitrous if you wanna get crazy). Maybe your fuel system could still keep up but really you should re-jet the carbs/upgrade fuel injectors and maybe other fuel system parts like a bigger pump. Ok, that's cool but now your exhaust system may very well be undersized and the backpressure will rob power from the engine unless you replace the entire exhaust train. So after all this your engine's kicking ass except it's burning fuel faster and generating more heat. Can your cooling system handle it? I don't even know where to begin upsizing a cooling system but I suppose a smaller gear/pully on the water pump (if possible) could do it along with a higher performance radiator and larger fan(s). On an air cooled bike this isn't even an option and you just have to deal with the engine running hot.
$15k later you realize that you could have just bought a stock Hayabusa with way more horsepower than the bike you completely rebuilt. The author claimed that after a long career working on bikes he had never seen performance upgrades that were more effective than putting that money towards a bigger bike. I suspect this applies to cars and trucks too. I seriously thought about buying an Ariel Atom. It's a supercharged 2.4L car that only weighs 1350 lbs so it does 0-60 in 2.9s stock.
My b2600 is fast enough for me. It tops out around 90 mph which is more than enough to get speeding tickets in any state. And I don't mind waiting 90 seconds to get up to 60mph.