I'm moving up to a four-stroke
on my 18-foot center console and may go as high as 90 hp, for which it's rated.
Four-stroke marine engines are more efficient, with less raw fuel spilling out of their tailpipes.
Is proliferation of many new four-stroke engines a problem?
But Piaggio decided to give its baby four-stroke twice the oomph for roughly the same price ( a dirt-cheap pounds 1,299.
But while a 50cc two-stroke can feel pretty quick, a 50cc four-stroke is sluggishly slow.
A two-stroke and a four-stroke
in a single four-cylinder engine?
These new two-strokes still release more HCs than four-strokes
, but like their dirtier carbureted brothers, they are lighter, faster, and less expensive than four-strokes
The Ulsterman has been battling against the odds all season on the two-stroke Proton KR machine but is ready to celebrate signing to ride on a four-stroke
next season by recording a good result.
Spaniard Criville, who won the world title in 1999 but has been shown the door by Honda after an 11-year association, will race a 500cc two-stroke next season as Yamaha's new four-stroke
will be restricted to the Marlboro Yamaha team of Italian Max Biaggi and Spaniard Carlos Checa.
Honda and Yamaha are leading the switch to four-stroke
machines which are set to revolutionise grand prix motorcycle racing over the next two years.
Burns, 23, will ride a two-stroke 500cc four cylinder Yamaha machine after his team's original four-stroke
prototypes were ruled out for technical infringements by the FIM.
Two new offerings in the four-stroke
category are a potent combination of the performance enthusiasts demand and the lowered emissions necessary in environmentally sensitive riding areas.