Here is the crankshaft ATHENA for your YAMAHA YZ 85cc 2 stroke long stroke. This crankshaft is of course identical to the original one and will be easily mounted on your machine without adaptation. The stroke has been corrected from 85cc to 112cc! A gain of torque will be immediate and a rise in speed also frightening. The connecting rod is forged from high quality steel, adjusted and balanced to ensure reliability in the extreme conditions of competition. It is equipped with a treated crankpin and silver-plated and reinforced needle cages. You will have understood, this crankshaft has been studied for competition with the best products on the market so that you can ride in total reliability

Technical data:

Bearing of the big end (mm) 20x26x13,8

Bore of the big end (mm) 20.00

Width of the butt (mm) 14.00

Center to center (mm) 97.60

Crank radius (mm) 25.55

Net weight (Kg) 1.78

Piston pin diameter (mm) 18.00

Swing wheel diameter (mm) 20.00

Pivot wheel length (mm) 61.00

Diameter of the pivot pulley (mm) 20.00

Length of the pivot pulley (mm) 52.50

Width of the shoulder (mm) 45.00

Width of the small end (mm) 14.00

Stroke (mm) 51.10

Washer thickness (mm) 20.00