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Cylinder -SCOOTER CENTER Conversion Vespa PX80 to 125 cc- Vespa PX80 / PX80 Elestart
Part no.:
7674415
Description
Complete cylinder kit to bring any PX80 to 125cc displacement without changing the crankshaft.
If the kit is registered by individual acceptance at the TÜV, you can benefit from the significantly lower insurance rates of the 125cc models.
To do this, only the cylinder including piston and head must be changed, the fuselage engine remains unopened. However, this should be in perfect condition. Experience has shown that many PX80s have not been ridden for a long time, and that the rubber oil seals in the engine are the main ones to suffer. If these are brittle / hardened, the engine can draw air, even if he was perhaps only 5000km driven.an engine revision is therefore always to be considered.
If the kit is registered by individual acceptance at the TÜV, you can benefit from the significantly lower insurance rates of the 125cc models.
To do this, only the cylinder including piston and head must be changed, the fuselage engine remains unopened. However, this should be in perfect condition. Experience has shown that many PX80s have not been ridden for a long time, and that the rubber oil seals in the engine are the main ones to suffer. If these are brittle / hardened, the engine can draw air, even if he was perhaps only 5000km driven.an engine revision is therefore always to be considered.
The original 80cc engine produces about 5hp at the rear wheel. With our conversion cylinder, the power increases to a remarkable 7-8HP, the whole with extreme reliability. So the cylinder is already in the range of a 135 DR. In the diagram below you can see the direct comparison between an original PX80 with original exhaust (red curve) and the SCK 125cc conversion cylinder also with original exhaust (red curve). In combination with a better exhaust (BGM Big Box Touring, Polini Box) the cylinder performs about 1-2HP more.
With a longer gear ratio (possible by simply changing the clutch pinion to 22 teeth) the top speed is also significantly increased. Due to the significantly wider torque curve, the gears no longer have to be fully accelerated through, and consumption is reduced.
Two vehicles equipped with prototypes of the SCK conversion cylinder were on the road in 2011 for several thousand kilometers without problems or breakdowns. Drivers are simply thrilled with the performance and low consumption.
- Main air correction jet: 160
- Mixing tube: BE3
- Main jet: 102-108 (start big)
- Secondary jet: 52/140
- W3AC or NGK B8HS
- Ignition timing: 18-19° from TDC.
- Bore: Ø57.0mm
- Stroke: 48mm (PX80 series)
- Compression: 8:1
- angle: approx. 110°/151°
- Incl. cylinder head
- Foot gasket: Spacer with 0.8mm (mount with sealant)
- Head gasket: none (like series)
- Piston clearance at top dead center of piston: 0.6-0.8mm
TIP:
If you like you can measure the pinch edge (distance between piston top and combustion chamber, measured on the very outside of the piston) by means of a thin solder.
The value can easily be reduced to 0.6mm which can improve torque and performance.
If the value is e.g. on 1.0mm, two of the three seals can be removed whereby the distance from piston to combustion chamber is reduced by approx. 0.4mm.
Adjust the jetting again if necessary.
Unfortunately, it is currently not possible to deliver this cylinder with a TÜV certificate.
The technical and formal hurdles for such a certificate are now so high that it would not be economically feasible (the selling price of the cylinder would be much too high).
In this case, please arrange an individual acceptance with the TÜV.
NOTE:
This item is currently not available.
€158.90 *
incl. VAT plus shipping costs
The item is ordered and will be in stock soon
Estimated delivery date: 22/04/2024
P
For this item you get
fidelity point/s
| General | |
|---|---|
| performance class: | sport |
| Gudgeon pins | |
| diameter: | 15 mm |
| Spark plugs | |
| thread type: | M14x1,25 |
| thread spark plug: | short |
| heat rating NGK: | B7HS |
| Cylinders | |
| displacement: | 122 cm³ |
| bore: | 57 mm |
| engine type: | 2-stroke |
| type of cooling: | air cooled |
| material: | cast iron |
| material piston cylinder surface: | cast iron |
| cylinder head inclusive: | |
| cylinder gasket set inclusive: | |
| shape exhaust port: | single port (oval) |
| exhaust mounting: | stub |
| Crankshafts | |
| stroke: | 48 mm |
| Pistons | |
| number of piston rings: | 2 |
| production method piston: | cast |
| Piston rings | |
| piston ring type: | common ring |
| thickness rings: | 2,5mm |
| Circlips | |
| circlip type: | Seeger-type |
| Cylinder heads | |
| cylinder head type: | one piece |
Please inform me once the product is available again.
| Customers alternatively searched for | |
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