Pro-tek Made For Honda CRF-250L CRF-250F CRF-300L Front Sprocket 520 Pitch 13T 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 CRF250L CRF250F CRF300F CRF 250 L F (13T)

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Pro-tek Made For Honda CRF-250L CRF-250F CRF-300L Features

• 520 Pitch (1/4" chain roller) 4140 nickel-chromoly steel front sprocket

• Available in three tooth sizes - 12T, 13T, 14T

• 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

About Pro-tek Made For Honda CRF-250L CRF-250F CRF-300L

This Pro-tek 520 Pitch (1/4" chain roller width) 13 tooth front sprocket is completely CNC machined to exact tolerances from 4140 nickel-chromoly steel resulting in accurate tooth profiles. This sprocket is available in three tooth sizes - 12T, 13T, 14T. This sprocket 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. The sprocket is then lightened with drilled holes to save on rotating mass. Every lb of rotating mass equates to a 4 lb weight reduction. The sprocket is then case hardened to Rc 58-60 and finished with a silver zinc plating for added durability and protection from corrosion. This sprocket is brand new in original packaging manufactured in the US from Pro-tek, a leading manufacturer in the industry now for over 25 years. Applications: 2013-2024 Honda CRF-250L CRF-300L14T Front/40T Rear Stock Gearing, 520-106 Stock Chain 2019-2020 Honda CRF-250F-K,L 13T Front/50T Rear Stock Gearing, 520-106 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 two teeth means adding/removing chain links.