Yamaha IT250

From CycleChaos
Revision as of 21:21, 8 November 2019 by Kylebass (talk | contribs) (adding data)
Jump to navigation Jump to search
'Yamaha IT250'
Also called IT250E, IT 250 E, IT 250
Production 1978 - 1982
Class [[:Category:Enduro motorcycles|Enduro]] [[Category:Enduro motorcycles]]
250cc single cylinder, two-stroke
Bore / Stroke 71.1mm x 71.1mm
Compression ratio 7.9:1
Top Speed 68 mph (110 km/h)
Horsepower 10.06 HP (7.5 KW) @ 5500RPM
Torque 10.33 ft/lbs (14.0 Nm) @ 5500RPM
Ignition cdi
Spark Plug NGK B9EV '77 , '78 , '79 , '80 , '83
NGK B9EGV '81-82
Transmission Gear box: 6-speed

Final Drive: chain

Clutch: wet plate
Suspension Front: conventional forks
Rear: mono-x triangular swingarm
Brakes Front: expanding brake (drum brake). cable
Rear: expanding brake (drum brake). mechanical link
Front Tire 3.00-21 '77 , '78 , '79 , '80 , '81-82 , '83
Rear Tire 140/80-18 '83
6705 '80 , '81-82
4.50-18 '77 , '78 , '79
Wheelbase 57.09 inches (1450 mm)
Length 86.81 inches (2205 mm)
Width 35.0 inches (889 mm)
Seat Height 36.42 inches (925 mm)
Weight 246.04 pounds (111.6 Kg) (dry), 95.3 kg (wet)
Fuel Capacity 3.2 Gallon (12.11 Liters)
Fuel Consumption 3.92 liters/100 km (25.5 km/l or 60.01 mpg)
Related Yamaha IT125
Yamaha IT175
Yamaha IT200
Yamaha IT250
Yamaha IT350
Yamaha IT400
Yamaha IT425
Yamaha IT490
Yamaha IT500
Yamaha TT250
Manuals Service Manual

The Yamaha IT250 was a is a 175cc, single cylinder, two stroke, reed valve, motocross motorcycle manufactured by Yamaha between 1978 and 1982. It could reach a top speed of 68 mph (110 km/h). Max torque was 10.33 ft/lbs (14.0 Nm) @ 5500 RPM. Claimed horsepower was 10.06 HP (7.5 KW) @ 5500 RPM.


The engine was a air cooled single cylinder, two-stroke. A 71.1mm bore x 71.1mm stroke result in a displacement of just 247.0 cubic centimeters. Fuel was supplied via a membrane.


It has a six speed gearbox, suspension is 32mm front forks, with monoshock and aluminum swingarm at the rear. The IT was made for enduro use, although it was used with success for trail riding and motocross.


The bike has a 6-speed transmission. Power was moderated via the wet plate.


It came with a -21 front tire and a -18 rear tire. Stopping was achieved via expanding brake (drum brake). cable in the front and a expanding brake (drum brake). mechanical link in the rear. The front suspension was a conventional forks while the rear was equipped with a mono-x triangular swingarm. The IT250 was fitted with a 3.2 Gallon (12.11 Liters) fuel tank. The bike weighed just 246.04 pounds (111.6 Kg). The wheelbase was 57.09 inches (1450 mm) long.

1980 - 1983 Yamaha IT 250

Based on the all-conquering YZ motocrossers, the IT 250 uses such high-tech innovations as YEIS, capacitor discharge ignition, a chrome-moly double-cradle frame and Yamaha`s exclusive Monoshock suspension.

In Media

List of Yamaha motorcycles

See Also