Bultaco Metralla Mk.2 250

The bike looked something like this when new - but this picture is from the cover of the Mk2. manual, and shows the motor with inclined Monobloc carby rather than the Concentric of later Metrallas

 engine                 single cylinder, 2-stroke
 cylinder bore          72 mm
 piston stroke          60 mm
 cubic capacity         244.29cc
 bhp at rpm             27.6bhp @ 7,500
 lubrication            5% SAE or 4% Bardahl VBA petroil mix
 carburetor             Amal Concentric
 gears                  5, right-hand foot change
 chassis                "Tubular steel in a triangular form"
 tires                  2.75 X 18 Ribbed front, 3.00 X 18 Universal rear
 weight                 102 Kg dry
 max. speed             164 Km/h ( the manual calls this Cruising speed! )
 brakes                 twin leading shoe drum front and sls at rear