Kolben

39.96mm - oversize piston complete, new

Oversized piston with 2 piston rings, piston pin and 2 snap rings.
Fuel nozzle: at least size 30cc or larger.
With 2 locking pins for the piston rings.
Recommendation: Cylinder honing dimensions 0.08 to 0.10mm.

NOTE on running in:
Entry time at least 200km with a mixing ratio of 1: 30/1: 35. No full throttle.

Suitable for example for the VeloS-models from 1956: 1400, 1700, 2200, 3300, 3800, the VeloS-models Impex S 3800 and Roland Garros (Hungary from 1993 to 2004) with plastic handles, 4600 (export USA), 5000 - also Dutch, Flash, 6000, Dutch oto/ami, Micron and the model Black'n Roll S4800.

The VeloS-models built before 1956 have a nose piston.

NOTE:
Suitable for the aluminum cylinder and the cast cylinder.

Not an original. Reproduction.

Honing and recoating aluminum cylinders, honing cast cylinders more information at www.mec-racing.de

39.97mm - oversize piston complete, new

Oversized piston with 2 piston rings, piston pin and 2 snap rings.
Fuel nozzle: at least size 30cc or larger.
With 2 locking pins for the piston rings.
Recommendation: Cylinder honing dimensions 0.08 to 0.10mm.

NOTE on running in:
Entry time at least 200km with a mixing ratio of 1: 30/1: 35. No full throttle.

Suitable for the VeloS-models from year of construction 1956: 1400, 1700, 2200, 3300, 3800, the VeloS-models Impex S 3800 and Roland Garros (Hungary from year 1993 to 2004) with plastic handles, 4600 (export USA), 5000 (also Dutch), Flash, 6000, Dutch oto/ami, Micron and the model Black'n Roll S4800.

The VeloS-models built before 1956 have a nose piston.

NOTE:
Suitable for the aluminum cylinder and the cast cylinder.

Not an original. Reproduction.

Honing and recoating aluminum cylinders, honing cast cylinders more information at www.mec-racing.de

Smooth-running connecting rod naked, new

Fits the VeloS-models and the model Black'n Roll S4800.

The connecting rod is reground and bead blasted.
Advantage: better acceleration and less vibration on the handlebar.

Matching connecting rod bearing on top (Part No. 60499), connecting rod bearing on bottom (Part No. 60466) and bushing for crankshaft (Part No. 60849).

39.50mm - sandard piston complete, new

Standard piston with 3 piston rings 39.50 x 1.70mm not chamfered, one piston pin and two snap rings.
Without locking pins for the piston rings.

Dimension:
Height 50.11mm.
Diameter above: 39.40mm.
Diameter below: 39.20mm.

Suitable for example for the VeloS-models from the year 1956: 1400, 1700, 2200, 3300, 3800, the VeloS-models Impex S 3800 and Roland Garros (Hungary from 1993 to 2004 with plastic handles), 4600 (export USA ), 5000 (also Dutch), Flash, 6000, Dutch oto/ami, Micron and the model Black'n Roll S4800.

The VeloS-models before the year 1956 have a nasal piston.

NOTE:
Suitable for the cast cylinder.

Not an original. Reproduction.

Honing and recoating aluminum cylinders, honing cast cylinders more information at www.mec-racing.de

39.75mm - Oversize-piston complete (VeloSoleX - Black'n Roll S4800), new

Pistons with 2 piston rings 39.75mm, piston pin and 2 snap rings. Height 50.00mm - Diameter 39.75mm - with lock for the piston rings.

NOTE:
The piston must be installed with the arrow in the direction of the carburettor. Entry time at least 200km with a mixing ratio of 1:30.

Suitable for the VeloS-models from year 1956: 1400, 1700, 2200, 3300, 3800, the VeloS-models Impex S 3800 and Roland Garros (Hungary from year of production 1993 to 2004 with plastic handles), 4600 (export USA), Black'n Roll S4800, 5000 (also Dutch), Flash, 6000, Dutch oto/ami, Micron and the model Black'n Roll S4800.

The VeloS-models before the year 1956 have a nasal piston.

NOTE:
For the cast cylinder.