With its 8.4mm extra piston stroke (79.0 x 54.3mm bore/stroke) it’s no surprise that the 800 is a torque monster. It produces more torque from 7000 rpm than the 675 does at its 11,000 rpm peak (47.92 lb-ft). From there it continues to generate rear wheel turning force in a very smooth and tire-friendly manner to a maximum figure of 58.9 lb-ft at 10,600 revs. Equally as impressive is how the curve remains flat—just barely tapering off as the 800 nears its 13,500 rpm redline.
With nearly 120 horsepower available at the back tire the 675cc Triple is certainly no slouch. But the extra 123cc’s of engine displacement demonstrate big gains in terms of horsepower. At its 13,500 rpm peak, the 800 belts out 11% more ponies than the 675 (132.82 vs. 119 hp). What the dyno can’t show however is how much faster the larger engine spools up at full throttle, offering the kind of snappy and rev-happy performance of a modern 250 four-stroke motocrosser.
To say that the F3 800’s engine is impressive would be an understatement. Considering its displacement, it has one of the broadest powerband’s in its class that will certainly be as effective on the road as it is on the dyno.