Some 70-90 hp four-strokes
are substantially heavier than your old engine and may bring the scuppers below the water, making self-bailing impossible.
Studies have emphasized the cleanliness of four-strokes
when compared to two-strokes, but no studies have been done to examine the effects of four-stroke
engines on their own.
It is being replaced by supposedly "cleaner" four-strokes
As you might expect, the design also can be applied to diesel engines, which also can be either two- or four-strokes
Two-stroke engines dominate recreational boating because they hold significant advantages over four-strokes
It's so different to Motegi and Sepang and should give us a real chance to at least fight with the four-strokes
Criville will race in the new-look class, now called MotoGP after the inclusion of 990cc four-strokes
, in the latest stage of a career that has also seen him crowned 125cc world champion.
Yamaha have already committed Italy's Max Biaggi and Spain's Carlos Checa to their M1 and other manufacturers are busy developing new machines to join the switch to four-strokes
Two-stroke and four-stroke
diesel, heavy fuel oil four-strokes
, auxiliary power, gas engines, turbochargers, management systems, fuel injection; electronic, hydraulic, common rail.
The bikes will obviously not be competitive with the four-strokes
but I'm racing at a circuit I know and so I hope we can qualify.
Combined with the company's five all-new engines, including two high performance, low-emission four-strokes
, Polaris is making a concerted effort to build snowmobiles with more power, lower emissions, smoother rides, easier handling and enhanced rider ergonomics.
Public Lands Associate Katy Rexford of Bluewater says Bush should do more to encourage manufacturers to make more ATVs with four-stroke