Ossa TR 250I: history, specs, pictures

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Ossa TR 250I
Manufacturer
Production 2014 - 2015
Class Trial
Engine
Two-stroke single cylinder inverted admission direct reed crankcase
Bore / Stroke 73.7mm x 73.7mm
Fuel System EFI Kokusan Battery-less System
Transmission Gear box: Gears

Final Drive: Chain

Clutch: Hydraulic
Suspension Front: Marzocchi Hydraulic Fork with 40 mm al. sliders Adjustable rebound and compression damping
Rear: Progressive hydraulic monoshock TTX Ohlins with adjustable preload, rebound and compression damping
Brakes Front: Single disc diameter 185 mm 4-piston calliper
Rear: Single disc diameter 150 mm 2-piston calliper
Front Tire 2.75 x21
Rear Tire 4.00 x1
Wheelbase 52.28 inches (1328 mm)
Seat Height 25.79 inches (655 mm)
Weight 66.0 kg (wet)
Manuals Service Manual


The Ossa TR 250I was a Two-stroke single cylinder inverted admission direct reed crankcase Trial motorcycle produced by Ossa between 2014 and 2015.

Engine[edit | edit source]

A 73.7mm bore x 73.7mm stroke result in a displacement of just 247.7 cubic centimeters.

Drive[edit | edit source]

The bike has a Gears transmission. Power was moderated via the Hydraulic.

Chassis[edit | edit source]

It came with a 2.75 x21 front tire and a 4.00 x1 rear tire. Stopping was achieved via Single disc diameter 185 mm 4-piston calliper in the front and a Single disc diameter 150 mm 2-piston calliper in the rear. The front suspension was a Marzocchi Hydraulic Fork with 40 mm al. sliders Adjustable rebound and compression damping while the rear was equipped with a Progressive hydraulic monoshock TTX Ohlins with adjustable preload, rebound and compression damping. The wheelbase was 52.28 inches (1328 mm) long.

2014 Ossa TR 250I[edit | edit source]

The TR250i is powered by a 249cc, 2-Stroke, single cylinder engine. With a cylinder bore of 72.5 in and stroke of 60 in, its motor is oversquare, meaning that the cylinder bore (width) is greater than the stroke (length). This makes the engine more powerful than one of similar displacement with a smaller bore. The engine is supported by electronic fuel injection which ensures smooth and timely fuel delivery.


2015 Ossa TR 250I[edit | edit source]

The TR 250i is powered by a 248cc, 2-Stroke, liquid-cooled, single cylinder engine. With a cylinder bore of 2.85 in and stroke of 2.36 in, its motor is oversquare, meaning that the cylinder bore (width) is greater than the stroke (length). This makes the engine more powerful than one of similar displacement with a smaller bore. The engine is supported by electronic fuel injection which ensures smooth and timely fuel delivery. Electronic ignition makes starting your bike a breeze and ensures a consistent throttle response.