The Suzuki RGV250 (Gamma) is a Suzuki high performance sport bike which had a great number of its features and design cues based on Grand Prix technologies and ideas.
It is a race-replica based on Suzuki's 250 cc GP bikes from 1987 to 1998, the RGV Gamma V-2 racer. This motorcycle replaced the RG250 Gamma, which employed an alloy frame with a two-stroke parallel twin engine. The bike produced over 50 bhp in a narrow power band between 8,000 to 11,000 rpm. The dry weight ranged between 128 kg (282 lb) (1989) to 140 kg (309 lb) (later models) dry weight.
The top speed of a standard RGV250 is around 130 mph (209 km/h). It has a 0-60 mph (97 km/h) time of around 3.7 seconds.
This motorcycle's engine performance is not very inspiring at engine speeds under 7,000 rpm, due to the two-stroke engine power delivery of a relatively narrow power band. However, once the engine is revved over 8,000 rpm, the power delivery characteristics effectively doubles, as is expected of a two-stroke racing motorcycle.
Due to its light weight, engine characteristics and cornering capabilities, it is particularly suited to the track, compared to other motorcycles of similar engine capacity.
The VJ21 was the first RGV250 production motorcycle available in Japan in 1988. Technical aspects were:-
- Alloy Beam frame
- 90-degree, water-cooled two-cylinder two-stroke V-Twin style V engine (separate crankcases, single in-line crankshaft)
- 2 piece, blade style, exhaust valves which have two positions - open and closed
- Dual Reed valves, with Suzuki Intake Pulse Control system (SIPC), similar to Yamaha Energy Induction System (YEIS) but avoids patent issues
- 32 mm Mikuni Carburettors on 88/89 models, replaced with 34 mm models with single air bleed on 1990 model
- 17" front, 18" rear three spoke alloy wheels with twin 296 mm front disc brakes and single rear
- Front suspension is conventional 41 mm damper type telescopic motorcycle forks (not cartridge)
- Suzuki Pointless Electronic Ignition (PEI) analogue ignition system on 1988 models, replaced with digital system on 1989/90 models which was a predecessor to the SAPC as fitted on the VJ22
- Dual, side-by-side expansion chambers
- Suzuki Advanced Power Control (SAPC) Electronic power valve and ignition timing control
- 3 piece, blade style, exhaust valves with three positions - closed, half open and fully open
- 34 mm Mikuni carburettors with dual air bleed system
- 41 mm inverted cartridge type telescopic motorcycle forks
- modified swing arm fitted to permit both expansion chambers to be routed on the right hand side
- 17" rear wheel
- 310 mm front discs
The VJ23 uses a totally redesigned engine with few interchangeable parts with the early models, and has a dry clutch and close-ratio gearbox as standard.
Honda NSR 250R-SP
Make Model
|
Honda NSR 250R-SP (MC28) |
Year
|
1995 |
Engine
|
Liquid cooled, 90°V-twin cylinder, two stroke, reed valve |
Capacity
|
249 |
Bore x Stroke | 54 x 54.5 mm |
Compression Ratio | 7.4:1 |
Induction
|
TB 10A |
Ignition /
Starting
|
CDI type |
Max Power
|
40hp @ 9000 rpm |
Max Torque
|
3.3 kgf-m @ 8000 rpm |
Transmission /
Drive
|
6 Speed / chain |
Front Suspension
|
Telescopic cartridge valve adjustable type preload and rebound |
Rear Suspension
|
Single shock adjustable damper Tension / compression Pro Link PRO-ARM single sided swingarm |
Front Brakes
|
2x 274mm discs 4 piston calipers |
Rear Brakes
|
Single 220mm disc |
Front Tyre
|
110/70-17 |
Rear Tyre
|
150/60-17 |
Dry-Weight
|
137 kg |
Fuel Capacity
|
16 Litres |
The 1995 NSR SP changed
it's colors to the HRC tri-colors with carbon fiber like stickers and it's high
grip Michelin tires to celebrate Mick Doohan's 1994 GP 500 Championship. There
are only a few of these bikes around as Honda again limited these bikes to a
brief production run of 1,500 units. Therefore they hold there value strongly
too. In 1996 there were no mechanical changes for the NSR's only new colors for
the new models. The standard R model was discontinued and now there were only
two types available.
The SE model with the dry clutch and it's fully adjustable
cartridge type front suspension and rear adjustable damper. Plus the SP version
in full Repsol colors. Honda had produced a large amount of early MC28 NSR's (
1994-1995 ) They were having difficulties selling them off so in 1996 the amount
of NSR's built were reduced. 1996 colors were available in Ross white and
sparkling red with yellow accents, the other choice was in Ross white and violet
with yellow accents that were the reversed colors of the other SE colors. SE
model NSR's were priced at 720,000 Yen and there were no more color changes for
the SE NSR's until their end of production in May 1999. 1996 was also the last
year for the SP to be sold in the world. It was released in striking Repsol
colors to once again celebrate Mick Doohan's 2nd consecutive world championship
in the GP 500 class.
These wonderful Repsol SP bikes were limited to only 1,000
bikes so getting your hands on one is probably a good investment if you can find
one for sale. These SP bikes were priced at 800,000 Yen due to there pricey and
light weight wheels in black. NSR's were still selling for 1997 and 1998 but
they were loosing popularity.
The racer replica boom was coming to an end with
younger people preferring American style cruisers or Café racers in Japan. Sales
for the NSR's were down and newly introduced laws in Japan that restricted
current two stroke emissions led to Honda canceling the NSR for street sales.
Who knows what could have been had Honda continued with the NSR. One of the
greatest racing bikes in all of history.
Source:
en.wikipedia.org
youtube.com
motorcyclespecs.co.za
Source:
en.wikipedia.org
youtube.com
motorcyclespecs.co.za
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