520 Pitch (1/4″ chain roller) 4140 nickel-chromoly steel front sprocket
Available in ooth sizes – 16T, 17T, 18T
Case hardened to Rc 58-60 and Silver Zinc Plated to protect from corrosion
Lightened with drilled holes to save on rotating mass
100% CNC machined instead of gear hobbing to guarantee accurate tooth profiles Product Description
This Pro-tek 520 Pitch (1/4″ chain roller width) 17 tooth front sprocket is completely CNC machined to exact tolerances from 4140 nickel-chromoly steel resulting in accurate tooth profiles.
It is available in ooth sizes – 16T, 17T, 18T.
This is Not gear-hobbed like other sprockets insuring that the teeth fit precisely on the chain rollers which insures maximum chain and sprocket life along with a more efficient power transmission. It is lightened with drilled holes to save on rotating mass. Every lb of rotating mass equates to a 4 lb weight reduction. The sprocket is case hardened to Rc 58-60 and finished with a silver zinc plating for added durability and protection from corrosion. This sprocket has a small offset side (engraved side) and a flat side as shown in pictures.
This sprocket is brand new manufactured in the US from Pro-tek, a leader in the industry for over 25 years.
Applications NOTE:This is a 520 pitch conversion sprocket which requires both 520 sprockets and a 520 pitch chain. The stock setup is a thicker 530/525 pitch
2009-2016 Suzuki GSXR-1000 17T Front/42T Rear Stock Gearing, 530-114 Stock Chain
2017-2020 Suzuki GSXR-1000 17T Front/45T Rear Stock Gearing, 525-120 Stock Chain
The gear ratio is ratio of teeth between front & rear sprockets. This determines how engine RPM translates into wheel speed by bike. Changing sprocket sizes, front or rear, changes this ratio which changes the way bike puts power to the ground. With respect to stock gearing, installing a smaller front sprocket (fewer teeth), or a larger rear sprocket (more teeth), provides a lower gear ratio increasing acceleration of the bike but decreasing top speed. Conversely, installing a larger front or smaller rear provides a higher ratio which decreases the acceleration but increases top speed. Every one tooth change in the front is equal to a 3 tooth change in the rear. So a rear change more than 2 teeth means adding/removing chain links.