Stage6 70cc Streetrace Cylinder Kit – Ø47mm, Piaggio AC (Zip, TPH, and more)

Powerful and durable cast iron cylinder kit designed for everyday riding performance.

Overview

The Stage6 Streetrace 70cc cast iron cylinder is an affordable yet powerful alternative to the popular Sport Pro aluminium version. Offering excellent reliability, strong torque, and a noticeable increase in top speed, it’s the perfect choice for riders seeking a balance between performance and durability for daily use.

Design and Construction

The Streetrace features a 6-transfer port layout and a single exhaust port — similar to the more powerful Sport Pro kit, but slightly modified to meet the thermal demands of a cast iron design. The kit includes a high-quality 2-ring piston and an aluminium cylinder head. Maintenance and tuning are straightforward, and all necessary spare parts are readily available.

Performance

Comparable to the Sport Pro in character, this cylinder provides strong low-end pull and increased overall power output — achieving around 10 hp when paired with the right components. To unlock its full potential, it should be used together with matching performance parts (see recommendations below).

Design

The cylinder has a discreet appearance, closely resembling a stock component — ideal for riders who prefer a subtle look.

Contents & Specifications :

• Cast iron cylinder, 47 mm bore
• 2-ring piston, 12 mm KoBo pin
• Aluminium cylinder head
• Complete gasket set
• Squish clearance pre-set (base gasket included)
• Without road approval

Run-in period :

Approx. 300 km (150 km at ½ throttle and 150 km at ¾ throttle).