Stage6 R/T MK2 Exhaust 70 CC - Black
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Product Information
Full details
The Stage6 R/T MK2 Exhaust is a high-performance upgrade designed for competitive riders and racing enthusiasts looking to unlock the full potential of 70cc engines. Engineered with precision-welded sheet metal and a carbon fiber silencer, it delivers significant power gains across the RPM range, though it requires advanced technical knowledge for proper jetting and transmission tuning to achieve optimal reliability.
All features
| Colour | Black |
|---|---|
| Model Part Number | S69614006 |
| Brand | Stage6 R/T |
Extended Product Information
FAQs
Is this exhaust street legal?
No, the Stage6 R/T MK2 is a racing exhaust designed exclusively for closed-course competition use.
Does this come with mounting hardware?
Yes, it includes the necessary springs, brackets, and the silentbloc mounting hardware.
Can I use this with a stock 50cc cylinder?
It is not recommended. This exhaust is engineered for the port timing and displacement of 70cc racing cylinders.
How do I prevent rust on the metal expansion chamber?
Keep the chamber clean and periodically wipe it down with a thin coat of high-temperature oil or apply a high-heat clear coat.
Why is the stinger tube removable?
The removable stinger allows for custom tuning of the exhaust gas pressure, which can be used to shift the power band slightly.
What maintenance does the silencer require?
You should check the internal packing material every 50-100 hours of track use and replace it if it becomes degraded or burned.
Troubleshooting
Engine is overheating after installation
Your air-fuel mixture is likely too lean. Increase your main jet size immediately to ensure sufficient fuel cooling.
Excessive vibration during operation
Check that the 'silentbloc' rubber bushing is properly seated and that the mounting springs are hooked securely in all attachment points.
Exhaust leaks at the cylinder head
Ensure the exhaust gasket is new and that the mounting flange bolts are torqued evenly in a cross pattern.
Pros and Cons
Pros
- Excellent power output for 70cc racing setups
- High-quality, durable materials including carbon fiber
- Sophisticated anti-vibration mounting system
- Adjustable tuning potential with removable stinger
- Premium racing-grade aesthetic
Cons
- Requires professional-level tuning and jetting
- Loud exhaust note not suitable for street-legal use
- Regular maintenance needed to prevent rust on the untreated metal
- Significant installation complexity compared to stock systems
Setup, Compatibility & Care
Installation of the Stage6 R/T MK2 should be performed on a cold engine. Ensure the exhaust flange is seated perfectly against the cylinder exhaust port to prevent leaks, which can ruin engine performance. Because this exhaust is made from raw sheet metal, it is susceptible to surface corrosion; it is highly recommended to apply a clear coat of high-temperature exhaust paint or oil the surface regularly if the bike is stored in humid environments. The carbon silencer should be repacked periodically with high-temperature glass wool to maintain performance and noise suppression levels. Always verify your carburetor jetting after installation, as the increased flow will create a leaner fuel mixture.