lighten and balanced cranksLightened and Balanced Cranks

Completely machine 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.

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 resists being tilted when cornering. Light cranks not only make more power, but help improve handling.

If I have my crank lightened, will it shorten it’s life?

Not if it’s done by us!!! We know when to lighten and when not to lighten. We also know how much material can be safely removed. Lately, we have seen many cases of
crank breakage or premature main bearing wear due to crankshafts that should not have been lightened at all or cranks that have just been lightened too much.
Besides being the device that transmits combustion explosions into rotating energy, your crank is also a large vibration dampener. If you let just any one
lighten your crank, especially if material is removed from your crank’s O.D., you are messing with your engines dampening system.

Why won’t you lighten my crank? It always makes a motorcycle run quicker doesn’t it?

Contrary to popular belief, it isn’t always wise to get your crankshaft lightened! With many years of crank modifying experience behind us we know what your crankshaft needs for it’s particular application. Companies that make blank statements saying that a lightened crank will make your bike go faster and decrease crank gyro effects should be avoided. All crankshafts and their applications cannot be lumped together with one generalized statement. The physics of flywheel effect and dampening ability come into play when a crank is being modified. When we manufacture crankshafts we sometimes design them to be even heavier than an OEM crank, so it stands to reason that one should use a crankshaft company that knows when, where, and how much to cut on your crankshaft.

crankshaft row leftThe 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.

 These 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.