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JT Sprockets 42-Tooth 525 Steel Rear Sprocket
Key Technology & Design
Made from C49 high carbon steel, a high-carbon alloy chosen for wear resistance in demanding drivetrain applications
525 chain pitch — confirm your bike's stock chain size before ordering; some models in the fitment range run 520 from factory
42-tooth rear sprocket at stock gearing for the MT-10 and YZF-R7; pairs with the stock front sprocket for standard drive ratios on these platforms
Street-oriented design; no lightweight cutouts or exotic coatings
Specs
Manufacturer Part Number
JTR1876.42
Tooth Count
42
Chain Size
525
Material
Steel
Color / Finish
Natural
Mounting Position
Rear
Riding Style
Street
Replaces OEM Part Numbers
B5B-25442-00-00
B5Y-25442-00-00
Fitment
2022–2023
Yamaha MT-10
2022
Yamaha MT-10 SP
2022–2023
Yamaha YZF-R7
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42T Steel Rear Sprocket – 525 (Yamaha)

Chain & Sprockets / JT Sprockets

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$40.03

Availability: Out of Stock

Quantity:

123 Out of Stock

Earn $2.00 in UBD Bucks

Fitment:

IMPORTANT: Please Review Your Owner’s Manual for Exact Amounts or Sizing of This Product!

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Questions?
Speak to one of our experts today:
469-490-3577

Brand:

JT Sprockets

SKU:

1210-2763

Description:

JT Sprockets 42-Tooth 525 Steel Rear Sprocket

Key Technology & Design

• Made from C49 high carbon steel, a high-carbon alloy chosen for wear resistance in demanding drivetrain applications
• 525 chain pitch — confirm your bike’s stock chain size before ordering; some models in the fitment range run 520 from factory
• 42-tooth rear sprocket at stock gearing for the MT-10 and YZF-R7; pairs with the stock front sprocket for standard drive ratios on these platforms
• Street-oriented design; no lightweight cutouts or exotic coatings

Specs

Manufacturer Part Number	JTR1876.42
Tooth Count	42
Chain Size	525
Material	Steel
Color / Finish	Natural
Mounting Position	Rear
Riding Style	Street

Replaces OEM Part Numbers

• B5B-25442-00-00
• B5Y-25442-00-00

Fitment

2022–2023	Yamaha MT-10
2022	Yamaha MT-10 SP
2022–2023	Yamaha YZF-R7

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