Cylinder Kit Stage6 R/T 70cc FL

Stage6 R/T FL 70cc Cylinder Kit for FL Crankcases

The next generation of the Stage6 R/T has arrived. Not just a simple successor, but the logical evolution of a true Stage6 legend: the Stage6 R/T FLR 70cc cylinder kit for Flange Mount (FL) tuning crankcases such as Malossi C-One, RC-One, 2Fast Passion, Polini P.R.E., or TPR Factory. The cylinder can be installed on scooters with Piaggio long / short LC as well as Minarelli LC engines.

The R/T Legend Returns

More than 15 years ago, the first Stage6 R/T cylinder set new benchmarks and became one of the most defining products in Stage6 history. Uncompromising performance, innovation, and top-tier quality made it the brand's flagship. Now the R/T is back – radically redesigned and ready for the next generation. 

Six years of development, countless dyno runs, thousands of track miles, and several complete fresh starts were driven by a clear goal: maximum racing performance, a wide usable powerband, and uncompromising reliability under harsh racing conditions.

Not just a successor, but the next level of the R/T cylinder.

Stage6 FL 70cc Cylinder – 29 HP Maximum Performance

The Stage6 R/T FL 70cc cylinder kit features a 70cc displacement based on a 47.6 mm bore and 39.3 mm stroke combination.

Right out of the box, the kit delivers approx. 29 hp at 14,500 rpm  (tested with a 28 mm carburetor) in combination with the Stage6 R/T FL 70 exhaust, Stage6 R/T inner rotor ignition, Stage6 R/T Oversize CVT kit, PWK 28 carburetor, Stage6 by V-Force reed valve, and tall gear ratio.

The priority was deliberately placed on a broad, usable powerband rather than sacrificing rideability for a peak figure. Thanks to this wide rpm band, the engine is significantly less sensitive to CVT tuning fluctuations, ensuring consistent performance during long races and high operating temperatures.

Unlike many standard racing cylinders, this cylinder delivers maximum racing performance straight out of the box, without requiring extensive prep work or additional porting: simply bolt it on, tune the engine, and hit the track. At the same time, Stage6 R/T engineers left sufficient material in the cylinder casting, giving experienced tuners plenty of room for custom modifications if desired.

Stage6 FL Tuning Cylinder – Combustion Chamber & Flange

To fully eliminate production-related port timing tolerances, every individual cylinder is precisely measured prior to shipping. Based on these measurements, the optimal combustion chamber insert is selected from three available heights: 2.3 mm, 2.5 mm, or 2.7 mm, ensuring fitment at the highest level.

The exhaust tract features extreme precision and maximum sealing: the 5-axis CNC-machined exhaust flange provides a smooth, flow-optimized transition from the oval exhaust port to the round header connection. Three O-rings (one facing the cylinder and two on the header connection) keep exhaust pressure fully sealed and reliably prevent fuel and oil residue leaks.

Technical Specifications and Scope of Delivery Stage6 R/T 70 FL

• Aluminum cylinder with 70cc displacement, 47.6 mm bore, and highly resistant Nikasil coating
• 5 transfer ports and bridged exhaust port
• 47.6 mm piston with 12 mm piston pin and 0.8 mm piston ring
• Two-piece cylinder head with orange anodized water jacket
• Designed for standard stroke and 90 mm connecting rod
• CNC exhaust flange with three O-rings, 4-bolt mounting
• All gaskets and hardware required for installation included
• For FL tuning crankcases
• Fits Piaggio long / short LC (NRG, Runner) and Minarelli horizontal LC (Aerox)

Important: This cylinder kit cannot be mounted on original / standard crankcases!

Note: Not street-legal - Racing only!