NCY

NCY 72cc Big Bore Piston & Cylinder Kit — Yamaha & Genuine 2

SKU PRCK1
$200.00
Shipping calculated at checkout.
Description

NCY replacement piston assembly for Genuine Buddy 50, RoughHouse 50, and 2T Minarelli bikes running NCY's 47mm Cylinder Kit. Pick up a replacement gasket set while you're at it. 

Specifications:

  • Includes piston, pin, clips, rings
  • Aluminum Piston: 47mm
  • 2 Piston Rings: 47mm
  • Wrist Pin w/G-clips: 10mm

Compatibility:

Performance Highlights

  • 72cc Displacement: Increased bore diameter (47mm) provides a 40%+ increase in displacement over stock, resulting in explosive off-the-line takeoffs.
  • Cast Iron Construction: Chosen for superior heat retention and durability, making it more forgiving during the "break-in" period than expensive aluminum/nikasil kits.
  • Optimized Porting: Intake and exhaust ports are precision-cast to improve scavenging, allowing your engine to breathe better at higher RPMs.
  • Complete Top-End Overhaul: Includes everything needed for a fresh build—cylinder, piston, rings, wrist pin, clips, and a full top-end gasket set.

Detailed Model Fitment

Designed for Minarelli-style (1PE40QMB) horizontal 50cc 2-stroke engines with a 10mm wrist pin:

Brand Compatible Models
Genuine Scooter Co. Buddy 50, RoughHouse 50, Black Jack 50, Rattler 50
Yamaha Zuma 50 (2002-2011 "Bug Eye"), Vino 50 (2-Stroke), Jog
Adly / Chinese 2T Fox, Jet 50, Noble 50, Thunder Bike, and most 1PE40QMB clones

What’s Included:

  • 47mm Cast Iron Cylinder
  • Performance Piston & Rings
  • 10mm Wrist Pin & G-Clips
  • Head Gasket & Base Gasket
CRITICAL TUNING NOTE: You MUST up-jet your carburetor after installing this kit to prevent "soft-seizing" from a lean fuel mixture. We recommend starting with a main jet 10-15 sizes larger than stock. Professional installation is highly recommended.
Product Diagrams
Model Fitments

Brands: Amstar, Amigo, Ascend, Baotian, Bashan, Blade, Boom, Chicago Scooter Company, Dongfang, Roketa, Baotian, Bashan, BMS, Cool Sports, E Ton, Fly Wing, Eagle, Fly, Italica, Riya, Ice Bear, Jackel, Jet Moto, JCL, Taotao, Peace, JM Star, Jonway, Kazuma, Keeway, KMD, Kymco, Lance, Lifan, Linhai, Loncin, Longbo, Fuxin, Jiajue, Tao Tao, Tao Motors, Trailmaster, Maxtrade, Meitien, Motofino, Motorino, NST, Panterra, Panther, Qlink, Yiben, Red Streak, Redcat, Roketa, Schwinn, Strada, SYM, Tank, Terminator ,Tomberlin, TNG, United Motors, Vento, Vitacci, Wildfire, Wolf, X-Treme, X-Pro, Yongfu, ZNEN, Zhongneng , Zhilong, Geely, Wangye, ZH and more Manufactured by: Taizhou Zhongneng Motorcycle Co.; Jiangsu Zhongneng Motorcycle Co.; Jiangsu Meijunte Technology Co.; Taizhou Qianxin Vehicle Co.; Ningbo Dongfang Lingyun Vehicle Made Co.; Taizhou Zhilong Technology Co.; Zhejiang Jiajue Motorcycle Manufacturing Co.; Zhejiang Gelly Ming Industrial Co.; Taizhou City Senglong Motorcycle Manufacture Co.; Jiangsu Sacin Motorcycle Co.; Jiangsu Linhai Power Machinery Group Co.; Zheijiang TaoTao Vehicles Co.; Zhejiang Senling Motorcycle Co.; Sanmen County Yongfu Machine Co; Taizhou Jiaojiang Zhiwei Motorcycle Manufacture Co.; Huzhou Daixi Zhenhua Technology Trade Co.; Taizhou Zhongneng Motorcycle Co.; Zhejiang Riya Motorcycle Co.; Ningbo Longjia Motorcycle Co.; Taizhou Zhongneng Motorcycle Co.; and more

  • Same day shipping for orders placed before 2PM (CST) M-F
  • 30-day return period
  • Flat-rate shipping for orders shipped to the 48 Contiguous United States.
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