Honda CBR250 CC
Bike Details
Initially these bikes were only sold new in Japan, and later the CBR250RR was sold new in Australia. They however can be found in almost any country of the world, and in a number is the most powerful 4-stroke bike a learner is allowed to ride, and hence their popularity. The CBR250RR has six gears, and revs just under 9,000 rpm at 100 km/h. Despite the high revs, the bike requires little maintenance, and should easily last 100,000 km with regular oil changes (over 1/2 a billion revolutions). The engine is somewhat unusual in that it uses gear driven cams, further reducing maintenance requirements.
The suspension on the bike was reasonably basic with non-adjustable front forks and a rear monoshock with adjustment for preload only. To change the front preload and/or dampening, owners have been known to install spacers and change the fork oil. Other modifications include the fitting of a fully adjustable front end from another bike e.g. a NSR250.[1]
The models most commonly grey-imported into Australia were the MC22 and MC19 models. The earlier MC14 and MC17 are quite rare. During the mid 90's there was a collapse in the Japanese 250cc bike market due to a sudden change in licensing regulations allowing riders on the previous 250cc license class to ride bigger bikes. The excess new bikes (MC22 CBR250RR (R) and (R-II) models) were shipped to Australia by Honda MPE where they were sold as part of the company's official lineup. [2] This has proven quite useful to owners of grey-market imported CBR250RR's seeking spare parts.
The CBR250RR(R) is frequently 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 featured 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.
Specifications
All specifications are manufacturer claimed except as stated.
Model | MC14 | MC17 | MC19 | MC22 | |
---|---|---|---|---|---|
Year | 1986 CBR250FG and FG-YA | 1987 CBR250R (H) | 1988-1989 CBR250R (J) and (K) | 1990-1993 CBR250RR (L) and (N) 'Jap spec' | 1994-1999 CBR250RR (R) and (R-II) 'Tri-colour' 'Aus spec' |
Engine type | MC14e - 4 Stroke - 16 valve - Liquid Cooled - Inline Four | ||||
Displacement | 249 cc (15.2 cu in) | ||||
Bore/stroke | 48.5 mm x 33.8 mm | ||||
Power | 45 hp (34 kW) @ 14,500 rpm | 45 hp (34 kW) @ 15,000 rpm | 40 hp (30 kW) @ 14,500 rpm | ||
Maximum torque | 2.6 kg-m @ 10,500 rpm | 21.5 Nm @ 12,000 rpm | 23.5 Nm @ 11,500 rpm | ||
Compression ratio | 11.0:1 | 11.5:1 | |||
Carburetion | VG05 | VP 20 | |||
Transmission | 6-speed | ||||
Final drive | 0-ring Chain | ||||
Rake/trail | Rake & Trail Angles: 24 / 89 mm | ||||
Front Tire Size | 100/80-17 | 110/70-17 | |||
Rear Tire Size | 140/70-17 | 140/60-17 | |||
Wheelbase | 1365 mm | 1345 mm | |||
Front Brake Type | Dual disc 2-piston calipers | Single disc | Dual 275 mm discs with 2-piston calipers | ||
Rear Brake Type | Single disc 1-piston caliper | 220 mm disc with 1-piston caliper | |||
Fuel Tank Capacity | 14L | 13L | |||
Seat Height | 725 mm | 735 mm | |||
Dry Weight | 142 kg (310 lb) [3] | 143 kg (320 lb) | |||
Wet Weight | 157 kg (350 lb) | 158 kg (350 lb) | |||
Fuel Economy | 16–20 km/L* | 2.5L/100 km Honda Figure 3.9-5.0 L/100 km* | |||
Top speed | 175kmh flat 190kmh downhill* | 190-200kmh | 165kmh[4] | ||
Headlights | Single front Headlight | Dual front Headlights | |||
Market Availability | Japanese Domestic Market | Japanese Domestic Market and frequently grey-imported into Australia | Australia and Japanese Domestic Market |
Note: Many sources incorrectly list the Dry weight of the CBR250RR as being ~157 kg. This is the wet weight. [3]
Sources
- Official English Honda Service Manual for CBR250 series
- http://www.totalmotorcycle.com/motorcyclespecshandbook/honda/1991-honda-CBR250RR.htm
- http://www.totalmotorcycle.com/motorcyclespecshandbook/honda/1998-honda-CBR250RR.htm
- Maintenance guide by DOS-boy contains many specifications and official photos
- ^ Fork Modification olilolo productions
- ^ [1] Requires forum registration
- ^ a b [2] Honda Japan's official CBR250RR Fact book in Japanese
- ^ http://www.dropbears.com/m/models/roadtests/cbr250rr.htm
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