Description
Since its inception, Stage6 are committed to develop performance-enhancing tuning parts and don't shy away from tackling new tasks. As of now, they are getting into the market for 50cc bikes by introducing the Stage6 Cylinder Kit Big Racing 88cc for Derbi Euro 3.
The cylinder kit includes:
- 88cc cylinder, aluminium, 50mm bore, 45mm stroke for 90mm connecting rod, with 5 transfer ports and 32mm bridged exhaust port
- 1-ring Vertex piston, d. 50mm
- high compression cylinder head, monobloc, aluminium
- gasket set (base and head gaskets)
The cylinder was developed in close cooperation with the MXS Racing experts; by benefitting from their considerable experience of 50cc bikes and drawing from their own extensive technical know-how, Stage6 was able to design a thoroughly convincing new tuning cylinder.
The cylinder features a rather basic and inconspicuous exterior, but we all know that appearances can be deceptive. We're talking genuine ""Big Bore"" here – cylinder layout is not based on a modified standard model that was milled open to create a bigger bore, but was designed as a Big Bore right from the start, with matching transfer ports and a bridged exhaust port big enough to support the excess performance.
The BigRacing cylinders impress with ease of installation, outstanding performance, and high reliability.
- Installation is very easy, crankcase milling or any other modification are not necessary. Squish clearance is pre-set to a value optimized for the respective engine type.
- In terms of output, the BigRacing cylinders knock it out of the ballpark: we measured a whopping 25,2 PS and 15,4 Nm on our P4 test bench using a standard set-up (24mm carburetor, original ignition, racing exhaust etc.).
- Port timings are relatively low, cooling system volume is quite large and the piston is a top quality Vertex piston. All of these factors contribute to the cylinder's high dependability and robustness, provided that set-up and adjustments are appropriate.
Displacement is 88cc (50mm piston / 45mm stroke / 90mm conrod) and is accordingly not street-legal (in many countries). You'll have to use a long-stroke crankshaft.
The exterior is a replica of the original cylinder with a 49cc stamp; don't worry, this is definitely an 88cc cylinder!
Notes:
- you'll need long cylinder bolts (M7x120mm) to mount this kit.
- depending on year of manufacture, you might have to make room for the connecting rod (milling).
Not street-legal (depending on country).
Stage6 BigRacing cylinder
The Big Racing cylinders are extremely powerful cylinders for 50cc supermotos. Although they are very powerful high-end cylinders, they offer a good balance of performance and reliability for intensive, regular, even daily use.
The aluminium cylinders have a displacement of 77 to 88 cc (with the corresponding crankshaft ) and were mainly developed for 50cc motorcycles with Derbi and AM6 engine, e.g. Rieju MRT, Beta RR or Sherco.
In combination with a suitable exhaust, a complete intake system and a suitable gearbox, the BigRacing can achieve maximum power with maximum torque and increased top speed.
The Stage6 R/T series delivers even more power, with uncompromising performance for use on the race track.
technical data :
- Aluminium cylinder
- 1-ring piston
- Original big bore design (not simply opened up)
- Transfer ports and compression designed for maximum reliability
- 77cc displacement for crankshaft with original stroke
- 86cc or 88cc cylinder for long stroke crankshaft
- One-piece cylinder head
- Discreet design with 49ccm lettering
- Also available as a kit with exhaust or crankshaft
- All spare parts available separately (pistons, gaskets)
How to Install a cylinder on a scooter, motorcycle or moped
The cylinder or cylinder kit is the heart of the engine on scooters, motorcycles and mopeds. It consists of a cylinder, a piston with piston ring(s), a cylinder head and gaskets needed for installation.
The service life of a cylinder depends on whether it has been fitted correctly.
Tuning Level: 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.
Racing products are designed for a more extreme uses and are developed primarily for racing. Whether you stay at 50cc or increase the displacement, the corresponding Racing parts produce much higher performance than the original parts in order to achieve maximum power.
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.
Spare Parts
- Stage6
Cylinder Gasket Kit Stage6 BigRacing / Streetrace 77/88cc Derbi Euro325,50 €In stockRRP26,50 €-4% Discount - Stage6
Cylinder Head Stage6 BigRacing / Streetrace 88cc Derbi Euro 3/ Euro 485,00 €Currently not in stockRRP89,00 €-4% Discount - Stage6
Water Connection Screw Stage6 Big Racing 77cc / 88cc cylinder head8,50 €In stockRRP9,40 €-10% Discount - Stage6
Piston Stage6 Big Racing 88cc 50mm Minarelli AM6 / Derbi80,50 €In stockRRP84,50 €-5% Discount - Stage6
Piston Ring Stage6 50mm Big Racing 77cc / 88cc37,00 €In stockRRP38,50 €-4% Discount
- Stage6
Radiator Fluid / Coolant -38°C Stage6 1L Orange10,50 €10,50 € / 1000 mlIn stock soonRRP11,50 €-9% Discount - Stage6 R/T
Clutch Discs 5 discs Stage6 R/T Derbi74,50 €In stockRRP82,50 €-10% Discount - Stage6
Tuning Kit cylinder + crankshaft Stage6 Big Racing 88cc stroke 45mm Derbi Euro3 / Euro4460,53 €448,98 €-14% Set-Rabatt - Stage6
Crankshaft Stage6 HPC 45mm stroke / 90mm connecting rod Derbi E3 / E4199,00 €In stockRRP221,00 €-10% Discount - Stage6
2-Stroke Oil 100% synthetic Stage6 Racing 1L19,00 €19,00 € / 1 LIn stockRRP21,00 €-10% Discount - NGK
Spark Plug NGK R6252E-105 (2396)16,50 €In stock - MotoForce Racing
Intake Manifold Racing adjustable D. 24mm / 32mm Derbi27,00 €In stock - Stage6
Reed Valve Stage6 Viton Minarelli AM6 / Derbi Euro 2 / Euro 369,50 €In stockRRP73,00 €-5% Discount - NGK
Spark Plug NGK BR10EIX Iridium (6801)17,00 €In stock - Barikit
Intake Manifold Barikit rubber mount PWK 21-28mm Derbi Euro 2 / Euro 325,50 €Currently not in stock - Stage6 R/T
Carburetor PWK Stage6 R/Tfrom 129,00 €
