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NCY Big Bore and Performance Cam Special '09-'15

Marsoni M251S
Sale price$122.00
Pay 4 payments of $30.50 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
NCY Big Bore and Performance Cam Special '09-'15Big Bore Kit and Cam (Cam is currently on backorder from our vendor no eta on back in stock) NCY Yamaha Zuma125 59mm Cast Iron Cylinder w o head Give your Yamaha Zuma 125 some extra kick with this bolt on 158cc big bore kit. The A9 is most popular cam shaft used when doing upgrades for power take off. Beef up your power with this racing cam.
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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.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 1389 reviews
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Product Reviews
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Verified Purchase
Foo Lew
Louisville, US
★★★★★ 5
Great shoe!
Size: 5.5 Big Kid, Color: (106) Castlerock/Anthracite/Phoenix Fire
Great fit, very durable, excellent foot support, lots of great colors to choose from. We have had these for over 6 months and thy have not overstretched or come apart in any way. I am really pleased with these shoes for my child who is VERY hard on shoes and usually has sensory issues surrounding shoe comfort/tightness.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 28, 2025
H
Verified Purchase
Hallee
Lexington, US
★★★★★ 5
Great fit for kids
Size: 10 Toddler, Color: Light Grey
We purchased the RUNSIDE Boys Girls Tennis Shoes for my child and have been really happy with them. They’re super lightweight and breathable, which is great for all-day wear and running around. My child says they’re comfortable, easy to put on, and don’t make their feet hot. The shoes seem durable so far and have held up well with playground time, sports, and everyday use. They also look cute and match with a lot of outfits. The fit was true to size and the non-slip sole gives good traction. Overall, these are a great affordable option for active kids and I would definitely buy them again!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
J
Verified Purchase
Johnna S.
Dallas, US
★★★★★ 5
10/10
Size: 12 Little Kid, Color: Black
Super cute! Great fit, breathable and durable material on the top of the shoe, super versatile with the solid neutral color, easy to clean, and great traction on the bottom of shoes!
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Reviewed in the United States on April 23, 2026
A
Verified Purchase
Amazon Customer
Whiting, US
★★★★★ 5
Great shoes!
Size: 5 Big Kid, Color: Light Grass Green
This is my second time purchasing these shoes! Not only are they stylish and well made, but they are comfortable! These have been used as running shoes, they have great support and suitable for long distances. The fit is true to size. Thank you!
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Reviewed in the United States on April 16, 2026
E
Verified Purchase
Elizabeth Schwartz
Carnegie, US
★★★★★ 4
Shoe laces aren't great.
Size: 3 Big Kid, Color: Black White
I bought these RUNSIDE kids tennis shoes for everyday wear and school, and overall they’re lightweight, breathable, and comfortable for active use. My child liked how easy they were to put on, and they worked well for running and general play. The shoes themselves feel flexible and pretty comfortable for the price point. The upper material is breathable, which helps during sports or warmer weather, and they don’t feel heavy on the feet. However, the main issue is the original shoelaces. They constantly came untied no matter how they were tied, which became frustrating pretty quickly during the day. We ended up replacing them with better-quality laces, and that solved the problem. Pros: * Lightweight and comfortable for kids * Breathable material works well for active use * Easy for everyday wear and school * Good fit for the price Cons: * Original shoelaces do not stay tied well * Laces needed to be replaced for practical use Overall, these are solid budget-friendly kids’ sneakers that work well once the laces are swapped out. The shoe itself is comfortable and functional, but the included laces are definitely a weak point.
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Reviewed in the United States on June 4, 2026

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