Tuning Kit cylinder - exhaust - crankshaft Stage6 R/T FL70
Description
Stage6 R/T FL 70 Engine Pack - Cylinder + Exhaust + Crankshaft
A complete kit for anyone taking Stage6 R/T to the track: Stage6 R/T FL70 tuning kit for FL / Flanged Mount crankcases. The pack includes cylinder, exhaust, and crankshaft - perfectly matched high-end components engineered for maximum performance.
FL70 engine kit contents:
The Stage6 R/T FL70 engine pack includes the following parts:
- Stage6 R/T FL70 cylinder kit
- Stage6 R/T FL70 exhaust
- Stage6 R/T FL70 crankshaft
Stage6 R/T FL70 Cylinder Kit
The outcome of six years of development work, the Stage6 R/T FL 70cc takes one of their flagship models to the next level, combining peak power, a broad usable powerband, and track-proven reliability.
Featuring a 47.6 mm bore, stock stroke (39.3 mm), and a 90 mm connecting rod, it delivers approximately 29 hp at 14,500 rpm with a matching setup. Its architecture simplifies variator tuning and delivers consistent power output, even during long races or extreme heat.
Installation requires no tedious preparation or transfer port modifications. Experienced tuners still retain sufficient material for custom modifications to target additional power gains.
Stage6 R/T FL70 Exhaust
The S6 R/T FL70 exhaust was developed specifically to match the Stage6 R/T FL 70 cylinder, ensuring seamless synergy so the cylinder can unleash its full potential. A powerband operating between 14,000 and 15,500 rpm ensures smooth power delivery and optimum performance. Paired with a properly tuned setup, the FL70 kit unlocks maximum output.
The exhaust is handcrafted from thin sheet steel with a raw, unpainted racing finish and comes supplied with a carbon silencer.
Stage6 R/T Crankshaft with 90 mm Conrod
Completing the engine build is the Stage6 R/T high-end crankshaft with a 90 mm connecting rod. Precision manufacturing, a CNC-machined conrod, and flow-optimized design make it particularly well-suited for racing applications. Precise dynamic balancing ensures smooth engine operation, while an 18 mm crankpin provides added durability. The Stage6 R/T crankshaft features larger crank webs (74 mm) than the stock model.
FL70 Engine Kit - 29 hp for Maximum Performance
Unlocking the full potential of this FL 70 engine package requires pairing it with a matching setup, consisting of a Stage6 R/T inner rotor ignition, Stage6 R/T Oversize variator kit, Stage6 Torque Control clutch, PWK 28 carburetor, Stage6 by V-Force reed valve, and taller secondary gearing, alongside the remaining components required for running a high-end engine build.
Important: Installation requires an FL-type crankcase, such as the Malossi C-One or RC-One, 2Fast Passion, or TPR Factory.
Properly tuned, this package delivers a wide powerband, simplified CVT calibration, and roughly 29 hp.
Stage6 R/T FL70 Pack at a Glance:
- 70cc aluminum cylinder with 47.6 mm bore and Nikasil coating
- 5 transfer ports and bridged exhaust port
- 47.6 mm piston with 12 mm piston pin and 0.8 mm piston ring
- Modular two-piece cylinder head with orange anodized cap
- Designed for stock stroke and 90 mm conrod
- CNC-machined exhaust flange with three O-rings and 4-bolt mount
- Exhaust with untreated, unpainted finish
- Carbon silencer included
- Racing crankshaft with 90 mm conrod and stock stroke
- For FL-type crankcases
- Not street-legal - Track use only (Racing only)!
Tuning Level: High End racing
We categorize our products into different performance levels Original, Sport, Racing and High End , so that our customers can choose the right parts for their setup. It is really important to combine parts that belong to the same tuning level, this is especially true for cylinders, crankshafts and exhausts.
High End Racing products are exclusively designed for racing and should only be handled by tuning pros with the appropriate technical know-how. High-end racing parts often require modifications or machining of certain elements to accommodate the often larger components (larger crank webs, larger intake, etc.). Whether you stick with 50cc or increase the displacement, high-end racing parts offer much higher performance than the original parts and are the most powerful tuning parts.
Note: To ensure the reliability of the engine, it is important that the parts are compatible and that you do regular maintenance on your two-wheeler.
Aluminium cylinders
Aluminium cylinders are more powerful than cast iron cylinders, but require more regular maintenance and must be combined with different components such as a reinforced crankshaft and a larger carburetor.
How to run in an aluminium cylinder?
Aluminium cylinders should be run in for about 200 kilometers , and you should use a fully synthetic engine oil.
Note: To ensure optimum performance and reliability, it is advisable to measure the squish clearance. Just have a look at our tutorial How to adjust squish clearance.
| Tuning Kit cylinder - exhaust - crankshaft Stage6 R/T FL70 | |
|---|---|
| Article no. | S6-7516615PACK2 |
| Weight | 4,09 kg |
| Series | R/T |
| Brand | Stage6 R/T |
| Product type | Engine pack |
| Tuning level | High-end |
| Displacement | 70cc |
| Homologation | No |
| Piston pin | 12 mm |
| Cylinder material | Aluminium |
| Bore | 47,6 mm |
| Stroke | Original |
| Conrod length | 90 mm |
| Spark plug thread | M14 long |
