Monday, August 1, 2011

Honda CBR250R


The CBR250 series of motorcycles was produced by Honda between 1986 and 1996. It is a lightweight sport bike with a six-speed gearbox and a 250 cc (15 cu in), four-cylinder, four-stroke engine capable of revving up to 19,000 rpm. In 2011, Honda introduced the completely new CBR250R with a lower revving, single cylinder engine which revs up to 10,500 rpm, made in Thailand
Model history
YearsModelDescription
1986 CBR250 (FG) and (FG-YA)
MC14 Twin front disks, single front headlight, bikini fairings.
1987 CBR250R (H)
MC17 Twin front disks, still single head light, full fairings.
1988 CBR250R (J)
MC19 Single larger front disk, smaller chain, twin head lights, fuel pump.
1989 CBR250R (K)
MC19 Essentially identical to the R(J), except now had a speed limiter which was set at 185 km/h.
1990–1991 CBR250RR (L)
MC22 A completely redesigned bike that had a new cast/pressed aluminum frame that gave a more aggressive riding position, gull shaped swing arm that was adopted from the NSR250R, higher rising tail, six spoke cast aluminum wheels and dual front 276 mm (10.9 in) floating disk brakes. These changes resulted in a dry weight of 142 kg (310 lb). The only feature that was adopted from the previous model CBR250s was the MC14E engine. This was slightly modified with a crankshaft that had 27.5 mm small-end journals, up 0.5 mm from the previous 27 mm journals. The engine also used a completely new set of VP carburetors that had smaller throats, reduced from 32 mm to 30.5 mm. These carburetors were fed by a vacuum operated pump for fuel delivery.
1992–1993 CBR250RR (N)
MC22 Essentially the same as the RR(L) except for new paint jobs.
1994–1996 CBR250RR (R)
MC22 Still very similar to the RR(L/N) but restricted to producing 40 PS (29 kW) due to changes in Japanese law. The restrictions were in the cylinder head, head gasket and ignition unit. Redline reduced to 18,500 rpm (from 19,000 rpm).
1997–1999 CBR250RR (RII)
MC22 These are identical to the RR(R), and are leftover bikes that were built in the 1994 to 1996 era, but sold in 1997 and 1998.

Bike details

Initially these bikes were only sold new in Japan, and later the CBR250RR was sold new in Australia. But they can be found in almost any country of the world. In countries which have a 250 cc learner capacity limit, the CBR250RR is one of the most powerful 4-stroke bikes a learner is allowed to ride.[citation needed] The CBR250RR has six gears, and revs just under 9,000 rpm at 100 km/h (62 mph). The engine uses gear driven cams.

The suspension on the bike was basic with non-adjustable front forks and a rear monoshock with adjustment for preload only.

The CBR250RR(R) is known as the 'tri-colour' due to the fact that most (but not all) of the official bikes came in that particular colour scheme. Other than the engine restrictions, this model had several additional differences to its predecessors (L & N models). The bike had more powerful low-beam headlights coupled to a new relay which was automatically deactivated by the start/crank button on the handlebar. This changed the pinout of the switchgear and kill-switch. The carburettor rubber boots were smaller on the CBR250RR(R) than the imports.
and marketed worldwide.

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