TL;DR: Stunt legend Rok Bagoroš and his mechanic Tomaž transform a Yamaha Aerox from 1998 with a full Stage 6 setup – going from a sluggish 3 HP to a ferocious 10 HP machine that smashes the 100 km/h mark without breaking a sweat.
🛵 The Find: A Vintage Yamaha Aerox Gets a Second Chance
For Rok Bagoroš, the Yamaha Aerox is no ordinary scooter. As a teenager, this was his ultimate dream machine – and now a 1998 barn-find example is standing right in front of him. Dirty, rusty and well past its prime. But the potential is impossible to ignore.
With just 3 HP from the factory and a top speed of around 70 km/h, the stock condition is obviously a non-starter for a professional stunt rider. The goal: a full-blown tuning project that launches the Aerox into an entirely different league.
🔧 The Setback: A Rust Trap in a 20-Year-Old Engine Block
Disassembly starts off smoothly – until a seized bolt snaps clean off inside the old engine block. After 20 years, the metal shows no mercy. The dream of a quick turnaround suddenly feels very distant, and Rok and Tomaž have to get creative.
Moments like this are exactly why experience and patience are non-negotiable in scooter tuning. With the right tools and a bit of ingenuity, the problem gets sorted – and the build carries on.
⚙️ The Heart of the Build: Stage 6 Setup with 70cc and a Flywheel Crankshaft
The upgrade package is uncompromising. The stock 50cc engine gives way to a performance-focused setup built for maximum output:
- ➜ 70cc racing cylinder from Stage 6 for significantly more displacement and torque
- ➜ Full-circle crankshaft for improved flywheel effect and higher rev capability
- ➜ 19 mm carburettor replacing the tiny original – for a proper fuel mix at every throttle position
- ➜ New suspension and completely revised running gear
The result: instead of 3 HP, the Aerox now produces a healthy 10 HP – more than three times the stock figure.
🛑 Serious Stopping Power: 280 mm Disc on a CNC Fork
More power demands more braking. The tiny original brake disc on the old Yamaha Aerox would be hopelessly outclassed by the new performance envelope. The solution:
- ➜ 280 mm brake disc for maximum deceleration
- ➜ CNC-machined fork for precise handling and a race-ready look
- ➜ Completely overhauled braking system to match the 10 HP setup
Safety and performance go hand in hand here – a must for any serious tuning project.
🔥 First Start: Two-Stroke Smell Fills the Workshop
After the long assembly process, the moment of truth arrives. First kick – nothing. Second kick – the engine fires up. The workshop fills with the unmistakable scent of a freshly started two-stroke, and the looks on Rok and Tomaž’s faces say it all.
This is one of the most rewarding moments in any tuning project: when hours of hard work pay off in a single sound.
🚀 High-Speed Test: Over 100 km/h Instead of 70 km/h
Out on the test strip, the rebuilt Yamaha Aerox shows its true colours. Where it used to run out of steam at around 70 km/h, the scooter now charges forward with brutal pull all the way past 100 km/h. The acceleration is simply breathtaking for a 50cc-framed scooter.
The Stage 6 setup delivers its full impact here – smooth, authoritative power delivery from low revs combined with a top speed that plays in a completely different ballpark.
🤸 Wheelies on Demand: Front Wheel Up at the Twist of the Throttle
The crowning moment of the test is a true Rok Bagoroš signature move. Before, he had to haul the old Aerox up with brute force and perfect technique just to get a wheelie going. Now, a short, deliberate twist of the throttle is all it takes – and the front wheel lifts effortlessly on its own.
That’s the difference between a tired stock moped and a proper Yamaha Aerox Stage 6 project. This is scooter tuning at its finest.
🛒 Check Out the Full Build
All the parts, specs and details from Rok Bagoroš‘s project are available directly at Yamaha Aerox Stage 6 by Rok Bagoroš at Scooter-Attack.
💚 Want to see the complete Stage 6 setup Rok Bagoroš built for the Yamaha Aerox? Check out every part in one place!
❓ FAQ
How much HP does the Yamaha Aerox make after Rok Bagoroš’s Stage 6 conversion?
After the full Stage 6 build, the Yamaha Aerox produces 10 HP – compared to just 3 HP in stock trim.
What cylinder does Stage 6 use in this Aerox project?
The build uses a 70cc racing cylinder from Stage 6, paired with a full-circle crankshaft and a 19 mm carburettor for optimal power delivery.
How fast does the tuned Yamaha Aerox go?
The modified Yamaha Aerox easily breaks the 100 km/h barrier – previously the top speed was around 70 km/h.
What changes were made to the Yamaha Aerox brakes?
The small stock disc was swapped for a 280 mm brake disc mounted on a CNC-machined fork, providing the stopping power needed to safely handle the increased performance.
Where can I find all the parts used in Rok Bagoroš’s Yamaha Aerox project?
The full parts list and all project details are available directly on Scooter-Attack under the Yamaha Aerox Stage 6 project by Rok Bagoroš.
