…evolve from its humble right-side drive, four-speed 55 cubic-inch beginnings to the electronically fuel-injected motorcycle that it is today. Our dyno chart for the 2007 Harley-Davidson XL 883 Sportster confirms the increase in low-end torque and shows a linear progression in horsepower. Now there's sure…

…below some of the competition. When tested on the dyno, the Vance & Hines product posted respectable power numbers. Right off the bottom torque production wasn’t as stout as the Screamin’ Eagles or Bassanis but is close. The torque dyno chart reveals a dead flat torque curve that peaks at 4300…

…with the Twin Cam 103, the Harley doesn’t match up to the 92.17 lb-ft of torque the Victory Vision put out at 2700 rpm on the dyno. Topping the horsepower and torque charts helped the Victory Vision Tour win our 0-60 test by 0.06 seconds. Both bikes produced similar power curves during the 0-60 runs…

…-order the S-T food chain, it seemed only fair to give the granddaddy of them all, the Honda ST1300, a chance to prove its mettle. The horsepower dyno chart shows the Kawasaki dominance, with the new C14 besting its nearest rival by 10 ponies at 133.8 hp at the rear wheel. Although each bike in our test…

…vibrations with twin counterbalancers that add bonus points to the Raider's overall positive rating by smoothing out the bike's ride. We didn't need the dyno charts on the 2008 Star Raider to know that power comes on strong early in the rev range, but the results from our Dynojet 200i confirm Yamaha's horsepower…

…-radius exit warrants 2nd gear. Here, lugging in 2nd gear, the GSX-R demonstrated a boggy response at about 5500 rpm, a condition verified by our dyno charts. Otherwise, the GSX'R's titanium-valved engine is a very cooperative partner on the track. Like the others, its overrev past the power peak is very…

…if you kick it from the very top of the stroke it can be done. Once up and running, the CRF’s powerband feels akin to the RM-Z. Looking at the dyno chart confirms this as the two bikes are almost identical until you’re around 7500 revs, or the upper edge of the engine's mid-range. That’s when the…

…one pony more at 33.0 hp. Those of you who stopped reading after the previous sentence won't get the full story, though. A quick glance at the dyno chart clearly shows an obvious advantage for the bigger-lunged 4-stroke. Power builds much earlier, and the torque advantage it has until 9000 rpm is massive…

…and excite me some more.” Despite the powerplant getting the lowest marks for character, it rated well in the subjective engine power, but on the dyno the numbers weren’t as impressive. The CBR1000RR ranked in the lower half of the field with 151.28 horsepower, but the torque was the highest from…

…machines. Horsepower is the first thing our testers want to talk about when discussing the Kawasaki. Some couldn’t discern the top-end pull, but the dyno charts show a distinct surge in the final 500 rpm where the other bikes fall off, making it one of the most well-rounded powerbands of all. But aside from…