JUN could achieve manufacturing its original flywheels about 200% more strength compared with normal flywheels. It was forged using Chrome-molybdenum steel. The power of inertia rotation can be decreased by reducing the excess weight, and therefore, its strength directly passed through to the high response.

JUN Ultra Light Weight Flywheel is targeted the customers who regard the higher rotation area for their highly modified engines. This flywheel is also designed to be strong as well as light-weight, and forged using Chrome-molybdenum steel.