Ossa EXPLORER 250: history, specs, pictures

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Ossa EXPLORER 250
Manufacturer
Production 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: Olle hydraulic fork with 40 mm sliders. Adjustable rebound and compression damping
Rear: Progressive hydraulic monoshock Olle with adjustable preload
Brakes Front: Disc diameter 185 mm 4-piston calliper
Rear: Disc diameter 180 mm 2-piston calliper
Front Tire 2.75 x21
Rear Tire 4.00 x18
Wheelbase 52.28 inches (1328 mm)
Seat Height 32.28 inches (820 mm)
Weight 79.0 kg (wet)
Fuel Capacity 0.53 Gallon (2.00 Liters)
Manuals Service Manual


The Ossa EXPLORER 250 was a Two-stroke single cylinder inverted admission direct reed crankcase Trial motorcycle produced by Ossa in 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 x18 rear tire. Stopping was achieved via Disc diameter 185 mm 4-piston calliper in the front and a Disc diameter 180 mm 2-piston calliper in the rear. The front suspension was a Olle hydraulic fork with 40 mm sliders. Adjustable rebound and compression damping while the rear was equipped with a Progressive hydraulic monoshock Olle with adjustable preload. The EXPLORER 250 was fitted with a 0.53 Gallon (2.00 Liters) fuel tank. The wheelbase was 52.28 inches (1328 mm) long.

2015 Ossa EXPLORER 250[edit | edit source]

The OSSA Explorer 250 is probably the reference bike in the segment of the trial-tip. To achieve this, they didn’t simply add a “kit” to the base of the TRi but designed an entire subframe, refined ergonomics including a large comfortable seat and specific footrests, and a large fuel tank that, in combination with its efficient fuel-injected engine, provide an excellent range. To achieve this, they didn’t simply add a “kit” to the base of the TRi but designed an entire subframe, refined ergonomics including a large comfortable seat and specific footrests, and a large fuel tank that, in combination with its efficient fuel-injected engine, provide an excellent range. The 2015 model gets a new Olle front fork carefully adjusted for the use of the Explorer, along with all the engine and frame optimizations of its trials sister.