For what it's worth Aprilia is defining this engine as an off-road engine. I wouldn't expect to see it in street-based bikes unless Aprilia thinks it can meet the much tougher noise and pollution requirements for such machines. Nothing on their website encourages such thinking.
After all, there are plenty of off-road only two-stroke dirtbikes. They are sold profitably without any intention from the manufacturers to make them street legal. Eventually they are being phased out. Aprilia may have no intention of ever making this engine available in a street legal machine.
Time will tell.
It'll be interesting to see if a 70 HP engine that requires 14,000 rpm to make that 70 HP will be able to compete in the dirt. Will it need a 10 speed transmission? Is there any midrange torque at all? What about the inherently slower revving response of a 4 stroke over a two stroke? This may not be a problem in road racing, but dirt is an entirely different animal.
I wish Aprilia luck.
After all, there are plenty of off-road only two-stroke dirtbikes. They are sold profitably without any intention from the manufacturers to make them street legal. Eventually they are being phased out. Aprilia may have no intention of ever making this engine available in a street legal machine.
Time will tell.
It'll be interesting to see if a 70 HP engine that requires 14,000 rpm to make that 70 HP will be able to compete in the dirt. Will it need a 10 speed transmission? Is there any midrange torque at all? What about the inherently slower revving response of a 4 stroke over a two stroke? This may not be a problem in road racing, but dirt is an entirely different animal.
I wish Aprilia luck.
