Yamaha RX 100
Yamaha RX100
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| Manufacturer | Yamaha |
|---|---|
| Also called | RX |
| Parent company | Yamaha |
| Production | 1984–1996 |
| Predecessor | Yamaha Rajdoot 350 |
| Successor | RXG, RX-135| RX135 TIGER, RXZ. |
| Class | Classic |
| Engine | 98 cc two-stroke, reed valve, air-cooled, single-cylinder, gasoline seven-port torque induction |
| Top speed | 120kmph (full conditioned) |
| Power | 11 HP (8.206 kW) @ 8500 RPM |
| Torque | 10.39 Nm (1.06 kgf-m or 7.66 ft.lbs) @ 6500 RPM |
| Transmission | 4-speed constant mesh, multiplate clutch |
| Suspension | Telescopic fork front, swing arm (adjustable five-position) rear |
| Brakes | Expanding Drum(both front and rear) |
| Tires | Wire spoked, 2.50-inch × 18-inch (4 ply rating) front tyre, 2.75-inch × 18-inch (6 ply rating) rear tyre. |
| Wheelbase | 1240 mm |
| Dimensions |
L: 2040 mm W: 740 mm H: 1050 mm |
| Seat height | 765 mm (29.5 inches) If adjustable, lowest setting. |
| Weight | 95 Kg (dry) 103 Kg (wet) |
| Fuel capacity | 10.5 L (2.3 imp gal; 2.8 US gal) |
| Oil capacity | 0.650 L (0.687 US qt) |
| Fuel consumption | 35-45 km/L |
| Turning radius |
2100 mm Shift_Pattern = 1-down 3-up (1-N-2-3-4) |
2100 mm
The Yamaha RX100 is a 98 cc two-stroke single-cylinder air-cooled motorcycle that was manufactured between 1984 and 1996 in India.
The Yamaha RX100 was launched in the mid 80's in India, and was produced until 1996. With the failure of Yamaha RD350 and the success of Ind-Suzuki's AX-100 in the market and masses, Yamaha realized the potential of Smaller Displacement Bikes in India. The RX-100 was launched in India in late 1985 shortly after the Ind-Suzuki AX-100 and Hero Honda CD-100 were launched. Kawasaki launched KB-100 a little later, in early 1986. It was one of the most reliable and peppiest smaller displacement bikes of the time. It gave tough competition to almost all bikes of that time. Many could not believe that a 100 cc engine, as claimed by the manufacturers, could deliver such raw power; people actually spread the rumor that it had a much bigger engine. It was also said that many race conductors and authorities double checked by opening the engine block to make sure it was actually 100 CC. This machine was used in many chain snatching and robbery incidents by some anti-social elements, which led to the banning of this bike by the state governments of Delhi, Uttar Pradesh, and Uttarakhand. Racers recognized the potential of RX's on dirt & Drag Races. Various modifications like expansion chambers, porting, tuning, sprocketing, wheel sizes(16", 17", 18") and upgrades like bigger carburettors, air filters, quick throttle, disc brakes, 5th gear, race pistons, racing CDI systems, grippier tyres and suspension dampening were done to extract the maximum potential out of the bike in races.
Tuned RX-100s have done quarter miles in about 14 seconds when a BMW-S1000RR 4-Cylinder 1000CC bike traveled a quarter mile in 10.2 seconds. The bikes manufactured between 1985 and 1987 were knock-down kits, (CKD) from Japan and were simply assembled in India. Only the model produced in Japan had disc brakes. Peacock Blue, Cherry Red and Metallic Black were stock colors. The only major changes that the bike underwent was that it was upgraded from a 6-volt electrical system to a 12-volt system and the CDI for the ignition and timing. The bike's production lasted from Nov 1985 - Mar 1996. Stricter emission laws and regulations made the production of RX100 impossible.
The model was followed by the 11.8 BHP, 132CC RXG, with a taller primary and secondary reduction. It is the same light flywheel of RX100 that causes a jerky ride. It was replaced with a heavier one by the manufacturer on the following year. Next came the RXZ in 1997, in a new chassis with a shorter wheelbase and with the same primary reduction ratio as RX100 but a taller final reduction. The RXZ was launched with a sportier bodywork and produced 12 bhp@6500rpm. Following the RXZ, in 1998 the RX135 was launched with the same engine of RXZ in the chassis of RX100 or RXG. RX135 saw a moderate success due to its refined power output and better fuel economy. Finally, in 2000, they launched the 14 bhp@7500rpm RX135 5speed with a catalytic converter silencer. It failed in the market due to its poor fuel economy and discontinued in two years. But later it was recognised as the quickest RX and has a cult status due to its rarity. A 5-speed variant of the RXZ with front disc brakes also had a limited release in 2001 at a premium price tag. The final variant was a 4-speed RX135 with a catalytic converter silencer, sporting a fuel gauge and speedometer with white dials which was sold very briefly from 2003-2005.
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