What category is the 1990 Yamaha RX 100?

The 1990 Yamaha RX 100 has a Category of Allround.

What is the engine size of the 1990 Yamaha RX 100?

The 1990 Yamaha RX 100 has a Capacity: of 100.00 ccm (6.10 cubic inches).

What type of engine does the 1990 Yamaha RX 100 have?

The 1990 Yamaha RX 100 has a Engine type of Single cylinder, two-stroke.

What is the engine power of the 1990 Yamaha RX 100?

The 1990 Yamaha RX 100 has a Power of 11.50.

What is the torque of the 1990 Yamaha RX 100?

The 1990 Yamaha RX 100 has a Torque of 8.60 Nm (0.9 kgf-m or 6.3 ft.lbs) @ 6500.

What is the top speed of the 1990 Yamaha RX 100?

The 1990 Yamaha RX 100 has a Top speed of 125.0 km/h (77.7 mph).

Is the 1990 Yamaha RX 100 air cooled or liquid cooled?

The 1990 Yamaha RX 100 has a Cooling system of Air.

How many gears does the 1990 Yamaha RX 100 have?

The 1990 Yamaha RX 100 has a Gearbox of 4-speed.

What is the fuel consumption of the 1990 Yamaha RX 100?

The 1990 Yamaha RX 100 has a Fuel consumption of 2.50 litres/100 km (40.0 km/l or 94.09 mpg).

How much does the 1990 Yamaha RX 100 weigh?

The 1990 Yamaha RX 100 has a Dry weight of 99.0 kg (218.3 pounds).

What is the seat height of the 1990 Yamaha RX 100?

The 1990 Yamaha RX 100 has a Seat height of 750 mm (29.5 inches) If adjustable, lowest setting..

Yamaha RX 100 - 1990 Specifications and Reviews

Name: 1990 Yamaha RX 100
Brand: Yamaha
Rating: 4.5 (2 reviews)

The 1990 Yamaha RX 100 is a lightweight 100cc two-stroke designed for entry-level and budget-conscious riders seeking reliable everyday transportation. Known for its simplicity, fuel efficiency, and nimble handling, it excels in urban commuting and casual riding. With 11.5 horsepower and a top speed of 125 km/h, it offers practical performance for novice motorcyclists.

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1990

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General information
Category	Allround
Year	1990
Model	Yamaha RX 100

Engine and Transmission Specifications
Exhaust system	Single stainless steel pipe
Greenhouse gases	58.0 CO
Fuel consumption	2.50 litres/100 km (40.0 km/l or 94.09 mpg)
Clutch	74 tooth clutch housing bell
Transmission type,final drive	Chain
Gearbox	4-speed
Cooling system	Air
Lubrication system	Autolube
Ignition	CDI
Fuel control	SOHC
Fuel system	Carburettor. Mikuni RM 18 mm
Valves per cylinder	2
Bore x stroke	50.0 x 50.0 mm (2.0 x 2.0 inches)
Compression	10.1:1
Max RPM	5800
0-100 km/h (0-62 mph)	19.500 seconds
Top speed	125.0 km/h (77.7 mph)
Torque	8.60 Nm (0.9 kgf-m or 6.3 ft.lbs) @ 6500
Power	11.50
Engine type	Single cylinder, two-stroke
Capacity:	100.00 ccm (6.10 cubic inches)
Brakes, suspension, Frame and wheels
Rear brakes	Expanding brake (drum brake)
Front brakes	Expanding brake (drum brake)
Rear tyre dimensions	3/18-4PR
Front tyre dimensions	2/18-4PR
Rear suspension	Coil spring oil damped
Front suspension	Telescopic oil damped
Frame type	Double cradle frame

Physical measures and capacities
Fuel capacity	10.50 litres (2.77 gallons)
Wheelbase	1 mm (0.0 inches)
Overall width	740 mm (29.1 inches)
Overall length	2 mm (0.1 inches)
Overall height	1 mm (0.0 inches)
Seat height	750 mm (29.5 inches) If adjustable, lowest setting.
Power/weight ratio	0.1162 HP/kg
Dry weight	99.0 kg (218.3 pounds)
Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay
Color options	red, black, blue, silver
Starter	Kick

Performance Profile & Rider Fit

11.5 hp

Peak Power

19.5s

0-60 mph

77.7 mph

Top Speed

Best For

Track25%

City85%

Cornering70%

Daily Riding75%

Touring25%

Passenger30%

Rider Profile

Best For	A great pick for new or returning riders thanks to its tiny weight, low seat height, and gentle power delivery.
Purpose	Built primarily as a lightweight commuter and city runabout rather than a performance or adventure machine.
Rider Fit	Very accessible for shorter or lighter riders, with an easy-to-manage 99 kg dry weight and low 750 mm seat height.
Character	A nostalgic, buzzy two-stroke single that rewards revving and nimble handling over outright speed.
Not Ideal For	Not suited to highway touring, two-up comfort, or off-road use given its drum brakes, small tank, and modest power.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

1990 Yamaha RX 100 Rider Ergonomics Assessment

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Feet:

At 750mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 1990 Yamaha RX 100, with a moderate knee angle of around 115 degrees and a forward-leaning riding position.

Data quality: estimated (wheelbase estimated from this category's typical bike, not this model's own spec). Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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