Description
Cylinder Bidalot RF80WR Derbi euro 3 / 4 version 2023
Always pushing for more power? Bidalot, the French tuning specialist, is known for delivering top-tier, high-performance racing components — and the RF80WR Racing Factory cylinder kit for Derbi Euro 3/4 engines is another benchmark. It offers improved cooling, long service life, and extreme precision thanks to advanced CAD-based design and manufacturing.
Design Bidalot RFWR Cylinder kit
The aluminum cylinder features a Nikasil-coated bore, 6 transfer ports, and an exhaust port with boost channels. Bidalot has completely redesigned the port layout, precisely matched to the 47.6mm bore, with the goal of maximizing high-RPM performance while still maintaining strong midrange torque.
The piston is made from a highly heat-resistant aluminum-silicon alloy and built for long-term durability under extreme conditions.
The one-piece cylinder head is CNC-machined and features a self-centering combustion chamber that protrudes 2.4mm into the bore. The water jacket has been re-engineered for optimal cooling, with uniform wall thickness throughout for consistent thermal stability. Coolant flows directly around the exhaust area before passing through the combustion chamber, ensuring efficient overall cooling.
Timing and compression are designed for racing use (±193° exhaust, ±132° overflow, with a compression ratio of 15.8-16.0 to 1).
Important: This is a true high-end race cylinder. It must be paired with matching performance parts - reinforced racing crankshaft (with 90mm connecting rod and 44.9mm stroke), internal rotor ignition, VForce reed valve, larger carburetor (32mm), reinforced clutch, etc. This setup is not for beginners — serious tuning experience is required.
The cylinder uses a 4-bolt flange (Ø28x30mm), but can also be mounted with a 2-bolt flange (50mm bolt spacing).
Technical Specs – Bidalot RF80WR:
- Aluminium cylinder with Nikasil coating
- 6 transfer ports - exhaust with boost ports
- Aluminium-silicon alloy piston, 47,6mm
- Chrome plated piston ring, d. 47,6x1m
- Incl. gaskets, o-rings, screws and stud bolts (124mm long)
- Flange d.28x30mm - 4 screws
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: 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.
Spare Parts
- Bidalot
Cylinder (solo) Bidalot Racing Factory 80 WR Derbi Euro 3 / Euro 4259,00 €Currently not in stock - BidalotCylinder Head Bidalot Racing Factory 80 WR Minarelli AM6 / Derbi Euro 375,00 €Currently not in stock
- BidalotCylinder Gasket Set Bidalot Racing Factory 80 WR Derbi Euro 3 / Euro 427,50 €Currently not in stock
- BidalotCylinder Base Gasket 0,10mm Bidalot Racing Factory 80 WR Derbi Euro 3 / Euro 44,20 €Currently not in stock
- BidalotCylinder Base Gasket 0,20mm Bidalot Racing Factory 80 WR Derbi Euro 3 / Euro 44,20 €Currently not in stock
- BidalotCylinder Base Gasket 0,30mm Bidalot Racing Factory 80 WR Derbi Euro 3 / Euro 44,20 €Currently not in stock