Naraku 70cc Performance Cylinder & Piston Kit | Minarelli

Bump your air-cooled horizontal Minarelli 2-stroke to 70cc with the Naraku 70cc Big Bore Cylinder Kit. This complete kit includes a black anodized aluminum cylinder, low-friction molybdenum-coated flat-top piston, piston rings, 10mm wrist pin, circlips, head gasket, base gasket, and exhaust gasket — everything needed for the bore-up. When used with a stock crankshaft, total displacement comes out to 70cc.

Compatible with a stock or performance exhaust. Can be used with the stock cylinder head for higher compression, or with a larger 70cc head. Note: if used with the stock head, the electric starter may have difficulty turning over the engine due to increased compression.

Engine case modification may be required to accommodate the larger cylinder.

For off-road and closed-course competition use only. Not intended for use on public roads or land.

Kit Contents

• Black anodized aluminum cylinder (47mm bore)
• Molybdenum-coated flat-top piston with Naraku logo
• Piston rings
• 10mm wrist pin (wrist pin bearing not included)
• Circlips (x2)
• Head gasket
• Base gasket
• Exhaust gasket

Technical Specifications

• Displacement: 70cc (with stock crankshaft)
• Cylinder Bore: 47mm
• Cylinder Sleeve Outer Diameter: 50.5mm
• Wrist Pin Diameter: 10mm
• Wrist Pin Bearing: Not included
• Engine Type: Air-cooled horizontal Minarelli 2-stroke

Model Compatibility

• Adly: Thunder Bike 50
• Aprilia: Scarabeo 50 (1993–2006), SR50 (1994–2002)
• Benelli: Pepe 50, Andretti 50
• CPI: Oliver 50, Hussar 50, Popcorn 50
• E-Ton: Beamer 2
• Genuine: Buddy 50, RoughHouse 50
• Malaguti: Ciak 50 (2002–2005), F10, F12 AC, F15 AC, Yesterday 50 (2001–2006)
• MuZ/MZ-Moskito: RX50, SX50
• Yamaha: Jog 50 (1992–2001), Zuma (2002–2011), Vino 2T
• Other scooters with air-cooled horizontal Minarelli 2-stroke engines

California Prop 65 Warning: www.p65warnings.ca.gov

• Complete kit: cylinder, moly-coated piston, rings, wrist pin, circlips, and full gasket set
• 47mm bore — upgrades air-cooled horizontal Minarelli 2-stroke to 70cc with stock crank
• Low-friction molybdenum-coated flat-top piston for reduced wear and improved power
• Compatible with stock or performance exhaust and stock or 70cc cylinder head
• Engine case modification may be required to fit larger cylinder

Displacement: 70cc (stock crank) | Bore: 47mm | Sleeve OD: 50.5mm | Wrist Pin: 10mm | Wrist Pin Bearing: Not included | Engine: AC horizontal Minarelli 2T | Includes: Cylinder, piston, rings, pin, circlips, head/base/exhaust gaskets

Air-cooled horizontal Minarelli 2-stroke engines: Genuine Buddy 50, RoughHouse 50; Yamaha Jog 50 (1992-2001), Zuma (2002-2011), Vino 2T; Aprilia Scarabeo 50 (1993-2006), SR50 (1994-2002); Malaguti Ciak 50, F10, F12 AC, F15 AC, Yesterday 50; Benelli Pepe 50, Andretti 50; CPI Oliver 50, Hussar 50, Popcorn 50; E-Ton Beamer 2; Adly Thunder Bike 50