That’s a fair performance increase indeed. Within the Woolich software what is the single most item to be selected to offer the most gain for interest apart from tuning? What I mean is, is lifting the RPM ceiling is what benefits the most?2017 CBR 1000RR
Two comparisons shown on the chart;
- Bone stock 2017 Fireblade - approx 2,500km on the clock
- Full Akrapovic titanium system including headers (baffles removed), MWR High efficiency air filters, Tuned using Woolich software.
On a dyno, they do actually have a measurable affect.Sprockets don't affect power, just wheel speed at specific rpm.
Very good information, but why in drag racing they bet -1 + 4, -1 + 5 ....?On a dyno, they do actually have a measurable affect.
"So did lowering the final-drive ratio actually reduce power? Theoretically, the three runs should not have produced a measurable power difference since no engine mods were made. The curves are nearly identical all the way up to peak RPM; however, the lower numbers meant that something had indeed changed the rear-wheel power. Since nothing from engine to output shaft had changed, the indicated loss in RWHP is a direct result of the lower final-drive ratio’s increased rate of acceleration. The ratio changes matched by corresponding drops in RWHP readings verify this. The lower gearing therefore multiplies torque, increases the rate of acceleration, but does not measurably increase or decrease horsepower at the crankshaft. We’ve proven that a sprocket ratio change does affect usable power measured at the wheel, but unlike popular belief, a bigger sprocket actually makes slightly less power on the dyno."
Does A Bigger Rear Motorcycle Sprocket Increase Horsepower?
is that stock compression ratio.