★★★★★ 5
buy these!!
these are legit original NGK, superior plugs, will buy again
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
WSM Yamaha 350 Piston Kit 50-540-06K - .75mm SIZE 83.75mm OE 1UY-11631-01-Y0
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
WSM Yamaha 350 Piston Kit 50-540-06K - .75mm SIZE 83.75mm OE 1UY-11631-01-Y0WSM Yamaha 350 Piston Kit 50 540K, OE 1UY 11631 01 Y0 . 75mm OVER SIZE ONLY 83. 75mm OEM #: 1UY 11631 01 Y0 Make Model CC HP Year Yamaha Big Bear 350 1987 Yamaha Big Bear 350 1988 Yamaha Big Bear 350 1989 Yamaha Big Bear 350 1990 Yamaha Big Bear 350 1991 Yamaha Big Bear 350 1992 Yamaha Big Bear 350 1993 Yamaha Big Bear 350 1994 Yamaha Big Bear 350 1995 Yamaha Big Bear 350 1996 Yamaha Big Bear 350 1997 Yamaha Big Bear 350 1998 Yamaha Big Bear 350 1999
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4.0 ★★★★★
Based on 2186 reviews
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Product Reviews
★★★★★ 5
Worked like a charm
Worked like a charm. The box and packaging were adequate from keeping the gaps of the plugs from being squished.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
★★★★★ 5
Perfect!!
As I expected, no more to say only I'm happy I got it.
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Reviewed in the United States on April 29, 2026
★★★★★ 5
Works great
Works great
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Reviewed in the United States on March 30, 2026
★★★★★ 5
exact fit
working good
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026
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