APE Racing Crankshafts
APE has been modifying and race prepping motorcycle crankshafts for over 22 years. The most popular service is lightening and race balancing cranks for racing and hot rod street bike use.
This service consist of precision machining the crank for weight removal and counterweight reshaping, computer race balancing for extended high RPM use, reworking the oil holes on rod journals for increased oil flow at the bearing, and micro polishing all journals. The balancing department uses the latest state of the art computerized balancer that is capable of measuring dynamic out of balance to .01 of a gram. No other balancing shop can balancer closer than APE.
These APE crankshafts have won championships in virtually all kinds of racing; road racing, drag racing, three quarter midgets, dwarf cars, mini sprints, etc. Every model crank is different and requires a different style of modification.
The advantage of a lightened crank… Much quicker throttle response, less power wasted trying to turn a heavy crank means more power to the rear wheel. The engine accelerates faster. Harder pull off the corners. Reshaped counterweights move through the oil mist with less drag. Lighter cranks have less gyro effect.
As all racers know, heavy wheels and brakes spinning fast act like gyroscopes, and resist being moved off their axis, such as leaning the bike over for cornering. Same with the crank. The heavier the spinning crank, the more it resist being tilted when cornering. Light cranks not only make more power, but help improve handling.
APE performs the complete lightening and balancing to the customers crankshaft. Magnaflux to check for cracks, highly recommended on oil cooled GSXR1100+s and FZR1000+s.