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this spring forces the engine into its peak power band
includes hardware
Aprilia Scarabeo 125/250GT 04-05 Rear
OEM valves
5 inches with the NCY billet aluminum frame extension kit
Dr. Pulley 15x12 Sliding Roller Weights:1PE40QMB Minarelli Yamaha Zuma 125 this spring forces the engineNext Gen CVT Tuning: Dr. Pulley 15x12mm Sliding Weights Standard roller weights rely on a rolling motion that eventually creates "flat spots," leading to sluggish acceleration and reduced top speeds. Dr. Pulley Sliding Weights utilize a patented wedge shaped design that slides up and down the variator ramps. This unique movement allows the weights to travel further than traditional rollers, effectively broadening your gear ratio for a "best of both
