Dodgyiti - Today 19:07 Well, I'm still liking my meagre R100RT minus the RT part and some other bits I may have accidently chopped off AHHHHHHHHHH... you put a quality Itialian mk1 fairing on a krut bike
A flat twin has a rocking couple (every kid has turned their pushbike upside down and wound away on the pedals right? The bike rocks from side to side,the rocking couple),but it's not really noticeable in a bike.Spoon 2 flat twins together and you double the RC,they don't cancel out.To put the cranks so they cancel the rocking couple will have 2 cyls close together,the other 2 wide apart...not really workable.
interesting... why dont goldwings fall over then? a crank and rod set up like in a radial engine would cure this?
Ah, but if you have a front and a rear on opposite sides firing simultaneously ? What then? Your rocking couple turns into a oscillating sigmoidal, doesn't it? Can't do it on a four stroke of course We will now adjourn while Mr Motu spends the next hour waggling his hands round working out the balance reactions.