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2001 Yamaha YZ125 Front Countershaft Sprockets

2001 Yamaha YZ125
Tire Size:
Front: 80/100-21, Rear: 100/90-19
Spark Plug:
Stock Chain/Belt:
Stock Gearing:
Front: 13T, Rear: 48T
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520 Front Countershaft Sprocket
You save $1.50 (14%)
JT 520 Front Countershaft Sprocket JT Sprockets are made exclusively from the finest Japanese 545C high carbon steel Heat treated and hand finished to meet or exceed OEM standards Outlasts any mild s
Closeout 6% off
520 Front Countershaft Sprocket
You save $0.96 (6%)
Sunstar 520 Front Countershaft Sprocket Designed for 520 size OEM replacements or suitable conversions to 520 size chain and sprockets Manufactured from case-hardened chromoly steel for the ultimat
Closeout up to 8% off
Pro Taper
520 Front Countershaft Sprocket
$22.99 - $23.99
You save up to $1.96 (8%)
Pro Taper 520 Front Countershaft Sprocket Precision broached and machined to the strictest standards Case hardened cro-moly steel Lightening holes keep sprocket light-weight Self-cleaning mud grooves

Latest Reviews

David (Clayton, IN)


Pro Taper 520XRC X Ring Chain

Good chain. Worth the extra money. Comes with extra links to accommodate oversize rear Sprocket. Prompt delivery. Good service and communication follow up.

Toshi S. (Huntington Beach, CA)

Cost Benefit

Feels great

I had to replace the chain on my '04 Ninja 250. Since this would be my 1st time since I bought the bike, I decided to change both sprockets as well. I went 15 in front, 45 in back - provides a good balance for in-town and freeway use. This sprocket fit perfectly, and feels very well-made; I expect it to show little sign of wear by the time this new chain wears out.

Dan (Independence, KS)


Very good quality - does the job

Sturdy piece of gear. It's not identical to the sprocket that comes off the bike, so instructions as to which side faces out would be nice. Noticeably changes the gearing- drops about 500 rpm in every gear (heck-of-a-lot better on the highway).

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