Top Performances Black Trophy - Big Bore Cylinder-piston kitRef : TPF00184A / 1127348

TOP PERFORMANCE Black Trophy Cylinder Kit - Big Bore (manufacturer part number: 9931270)

Designed for 50cc 2T scooters looking to upgrade to 71cc, this TOP PERFORMANCE Big Bore kit includes the essential components for a serious upper engine adaptation. Careful materials and technical finishes ensure a durable installation for urban and city use.

Kit contents:

• 1 cylinder Ø 48 mm made of "MINACROM" cast iron (chrome-enriched alloy)
• 1 piston Ø 48 mm high silicon content, Molybdenum Disulphide surface treatment
• 1 upper chrome ring and lower rings Ø 48
• shaft and circlips, head, O-rings and cylinder head gaskets, aluminum connector and fasteners
• mounting brackets Ø 12-22 & Ø 16-25 and 2 bolts M6 x 20

Technical specifications:

• Bore: 48 mm
• Stroke: 39.3 mm
• Displacement: 71 cm³
• Compression ratio: 1 : 12.3
• Piston compression: Racing
• Material (parts): MINACROM cast iron / aluminum components

Compatible with several 50cc 2T scooters (e.g., APRILIA SR 50 R FACTORY 2014, PIAGGIO ZIP 50 2T SP 2013, GILERA RUNNER 50 SP 2012). Installation is recommended by a qualified workshop to ensure proper timing, gaskets, and carburetor/exhaust adjustments. TOP PERFORMANCE product suitable for riders looking for a reliable and complete big bore kit for urban use.