This modification and upgrade, using BMW components, results in a lower-ratio
gearing for R26, R27, R50 and R60 gearboxes producing smoother, robust and responsive
performance especially in 1st, 2nd and 3rd gear changes while 4th gear is unchanged. The
ā€œSā€ gear ratios allow the rider to accelerate smoothly through gear changes by letting the
motor rev freely through an optimum power-torque range.

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