Airsal Alu-Sport 50 cc replacement piston ring set for Derbi EBE / EBS (geared moped up to year 2005/2006)

Genuine Airsal replacement piston rings for the Airsal Alu-Sport 50cc cylinder kit for Derbi Senda.

Piston rings wear with mileage. If performance drops noticeably on an otherwise healthy engine, worn rings are often the cause. A clear sign is blow-by marks on the piston skirt below the rings (combustion residue caused by poor sealing). A new piston ring set restores full compression, provided the cylinder bore surface and piston are in good condition.

Technical specifications

• Fits: Airsal Alu-Sport 50cc cylinder kit for Derbi Senda (Airsal No. 010814399)
• Series: Alu-Sport
• Displacement: 50 cc
• Engine: Derbi EBE / EBS (geared moped up to year 2005/2006)
• Cooling: liquid-cooled (LC)
• Engine type: 2-stroke
• Cylinder material (kit): Aluminium with a hard-coated cylinder bore surface
• Airsal part number: 110814399

Installation and running-in notes

• On 2-stroke pistons, the ring ends must sit against the locating pins in the ring grooves – otherwise the ring can catch in a port and break.
• Do not overstretch the rings when fitting them; clean carbon deposits from the ring grooves beforehand.
• Lightly oil the rings and cylinder bore surface before assembly.
• If the cylinder bore surface coating is damaged, replacing the rings alone will not help.
• Airsal replacement rings only fit Airsal pistons or cylinders of the specified size.
• Use a new cylinder gasket set during installation.
• After working on the piston and cylinder, run the engine in gently: avoid full load during the first kilometres, vary the engine speed and do not let the engine overheat. Afterwards, check the spark plug colour and carburettor settings.

Matching parts from the same Airsal product family

• Cylinder kit: Airsal Alu-Sport 50cc cylinder kit for Derbi Senda (Airsal No. 010814399)
• Gasket set: Airsal Alu-Sport 50cc gasket set for Derbi Senda (Airsal part no. 140814399)
• Piston: Airsal Alu-Sport 50cc piston for Derbi Senda (Airsal no. 060814399)
• Cylinder head: Airsal Alu-Sport 50cc cylinder head for Derbi Senda (Airsal no. 040814399)

Airsal is a long-established Spanish manufacturer that produces its cylinder kits in its own factory. Airsal supplies individual replacement parts for its kits, such as pistons, piston rings, gasket sets and cylinder heads, so an Airsal cylinder can be rebuilt without replacing the entire kit.

Also fits:

• Derbi: GPR 50 Racing (year 2004–2005)
• Gilera: H@k Enduro 50 (VTBC08)