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Honda’s Cross-Fertilization: GP Road Racer to 2000 CR 125 …

4 Мар 2015 | Author: dima | Комментарии отключены

Honda’s Cross-Fertilization: GP Road to 2000 CR 125

2000 Honda

I have often wondered the differences in design between a prix road racing and a typical motocross motor. are two strokes, and both are designed for (they don’t have to emissions laws). Why, for would a power-valve design in a GP result in more horsepower or a power-band than a dirt power-valve design?

Let me give you a example. By all accounts, Honda’s NSR 500 GP (the one ridden by Mick Alex Criville, etc.) 190 horsepower. An NSR 500 consists of four cylinders in a “V” formation somewhat the design of Honda’s VFR street and RC-45 racer (although are four-strokes, obviously, and there are differences – I am just talking the basic layout of the engine).

If you divide 190 by four, you come up approximately 47 horsepower per 125cc

The fastest 125cc motocross produce approximately 37 horsepower. A 125cc motocrosser makes 30. Huge dollars are thrown at motocross bikes as fast as (the 37 horsepower figure an estimated output for a full motocross 125cc machine – by all of the R-D efforts of Honda, Kawasaki, on their factory teams).

Why Honda be able to get an extra 10 from a 125cc cylinder on an NSR racing machine versus its single cylinder motocross Some of the difference may come to efficiencies in a four-cylinder design a single cylinder. As a percentage, less horsepower is lost friction and inertia in a larger, single crank motor in a smaller, single cylinder

Another factor leading to a in peak horsepower could be the of the power-band. If a GP road racer can with an extremely narrow the motor can probably achieve higher peak horsepower.

GP road racers need power-bands just like do, however. When driving out of an NSR 500 needs to “hook up” and get the power to the not spin the wheel violently. means a smooth power-band, than a peaky, hard-hitting

This article was prompted by the that the 2000 Honda CR 125 bike derives its power-valve from Honda’s NSR road Rumor has it that Honda out all the stops to make the 2000 CR 125 rip – it got tired of journalists calling the ’98 and ’99 CR 125

Honda even switched the CR 125 to a carburetor, after countless of utilizing a Keihin carburetor in its

The 2000 CR 125 is a totally new bike, and it be one of the more interesting motocrossers to a leg over this year. MD keep you posted.