Home
Classic
Harley
Yamaha
Suzuki
Ducati
Triumph
Honda
Kawasaki
Aprilia
Moto Guzzi
BMW
Buell
Morini
Royal Enfield
Racing
Tarmac
Track
Motocross
Trials
Mechanics
Chain
Oil
Battery
Tank
Carb
Horn
Lights
Brakes
Clutch
Cylinder
Gears
Wheels
Tyres
Chassis
Exhaust
Suspension
Misc

New type of engine - prototype being tested in Yamaha YP400 Scooter



Looks interesting - claims to have only 3 moving parts
That's quite impressive. I'll wait for someone with a brain to point out the
faults, cos they don't seem apparent to my untutored eye.
I'm certainly no engineer, but I'd imagine the complications are
around getting a good seal around those complex shaped 'pistons'.

There's been lots attempts at an alternative shape to the internal
moving parts of a ICE, and hardly any have ever made it into
production, let alone be succesful.
Starter motor looks a bit awkward ;-)

Could Timo or anyone who speaks Boxhead do a translation?
Scroll down?
The next generation?