


42T - Rear Sprocket - Yamaha YZF125R
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
42T - Rear Sprocket - Yamaha YZF125RMTX SPROCKETS Steel sprockets are strong and durable, heat treated and hand finished for longevity. Designed as an OEM replacement to exceed OEM specifications at a fraction of the price, making them your ideal cost effective solution for replacing old worn and warped sprockets. OEM replacement Exceeds OEM specifications Heat treated and hand finished Note: Image for reference only product may vary slightly for fitment
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Your 42T - Rear Sprocket - Yamaha YZF125R orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.2 ★★★★★
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★★★★★ 5
Good bang for your buck, great quality.
Works great. Most of it is metal and works as a heat sink. Came with two fuses and the adapters for smaller or larger Guage wires. Fit very well and easily for our choice of installation and was a great price.
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Reviewed in the United States on May 8, 2025
★★★★★ 5
Good for under the hood
Pretty good heavy duty block. It's got the rubber grommets for the smaller wire if needed.
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Reviewed in the United States on January 1, 2026
★★★★★ 5
Easy install
Excellent easy install
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Reviewed in the United States on February 11, 2026
★★★★★ 5
These are best quality ones ever had since I did been doing car audio
Great quality and durability
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Reviewed in the United States on February 8, 2026
★★★★★ 5
Well worth it
Very sturdy and well built.
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Reviewed in the United States on May 23, 2026