Not really sure why tbh. :-/.......the engine and gearbox unit has around175bhp and 105 lb-ft of torque (and weighs not much more than an Omega gearbox). In a half tonne car isnt that plenty of torque ? :-/
Maybe everything happens much higher up the rev range than in a car engine, but thats a characteristic of bike engines, would it just be a matter of getting used to that characteristic ?
It's mainly that the gear ratios are not ideal for a road car IME.
You end up with quite a tall 1st gear which, combined with a "tricky" clutch and relatively little torque (and, remember, very little flywheel effect due to the small rotating mass of the engine) makes it a bit of a pain to pull away without lots of revs and lots of clutch slip.
Once moving you've got a sequential 6 speed box with nice, close ratios so all good there - until you get up to motorway speed where cruising at 9,000 RPM becomes a bit wearing after a while, I'm told.
I think it's fair to say they are more suited to track use.
Kevin