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CRANKSHAFTS

APE is known world-wide for our race prep on four cylinder plain-bearing crankshafts. The who's who of racing depend on APE cranks for performance and dependability. Over 30 years experience modifying motorcycle cranks is available for your motorcycle and watercraft..

APE experts have reworked every kind of four cylinder plain bearing motorcycle crank there is. From the old Honda sohc 750 to the latest 400 hp watercraft..

The advantage of a lightened crank... Much quicker throttle response, less power wasted trying to turn a heavy crank means more power to the pump. The engine accelerates faster. Reshaped counterweights move through the oil mist with less drag.

ALL CRANKSHAFTS FROM APE ARE DYNAMICALLY RACE BALANCED TO LESS THAT 1/3 GRAM.
Posted on the Greenhulk forums regarding a 300 Ultra with an APE crankshaft:
"I just wanted to add that it was a great build. It is smooth through out the power band. I have ridden a few Ultras and I am impressed at the lack of vibration this engine has. "


LIGHTENED AND BALANCED CRANKS
APE completely machines the crank counter-weights to remove weight and narrow the profile (sometimes called "knife-edging".) The oil holes are fluted on certain models to keep more oil at the bearings. The crank is then balanced on a state-of-the-art computerized balancing machine to extremely tight tolerances. $285.00 to 299.00


BILLET 4MM STROKER CRANKSHAFT - KAWASAKI ULTRA 300

 

Exclusively from APE, 4 mm stroker crankshaft machined from solid billet premium steel. Connecting rod journals are offset to provide an additional 4mm of stroke.

When used with stock 83mm pistons, it increases the displacement from 1498cc to a huge 1584cc.

Required APE / Carrillo H beam connecting rods and 2 mm spacer plate to install.

These cranks sell out quickly. Contact APE and get your deposit in.

#BSC300ULTRA Call for pricing