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Cylinder -DR 75 cc Formula- Vespa V50, PK50
Part no.:
1310002
Description
Cylinder DR 75 Formula Uno - this is the sportiest 75cc DR cylinder for the Vespa V50 and PK50 models.
The cylinder has significantly more channel areas and exhaust cross section, and has, compared to all other DR cylinders for the small frame engines, the longest control angles (+13° exhaust compared to the very tame DR85).
In combination with the two generous secondary exhaust ports (which the cylinder still has, although otherwise claimed) the DR75 offers enough area to release the exhaust gases quickly from the cylinder even at higher speeds. This makes the cylinder particularly suitable for engines that are equipped with a very short gear ratio ex works. Especially the PK XL2 is grateful for any additional speed that can be obtained.
The DR thus also responds very well to larger carburettors such as the SHB 19/19 and other exhaust systems such as the LeoVinci or BGM Banana.
The cylinder is absolutely suitable for everyday use and reliable, despite all its speed capability, to which not least the coated piston plays its part. However, here too, as with any other conversion, the spraying (approx. 72-74 with SHB 16/16) and the heat value of the spark plug (NGK B8HS or Bosch W4AC) must be correct. The compression ratio of 10,7:1 is equal to the conventional 75/85cc DR cylinders.
AI-translation
The cylinder has significantly more channel areas and exhaust cross section, and has, compared to all other DR cylinders for the small frame engines, the longest control angles (+13° exhaust compared to the very tame DR85).
In combination with the two generous secondary exhaust ports (which the cylinder still has, although otherwise claimed) the DR75 offers enough area to release the exhaust gases quickly from the cylinder even at higher speeds. This makes the cylinder particularly suitable for engines that are equipped with a very short gear ratio ex works. Especially the PK XL2 is grateful for any additional speed that can be obtained.
The DR thus also responds very well to larger carburettors such as the SHB 19/19 and other exhaust systems such as the LeoVinci or BGM Banana.
The cylinder is absolutely suitable for everyday use and reliable, despite all its speed capability, to which not least the coated piston plays its part. However, here too, as with any other conversion, the spraying (approx. 72-74 with SHB 16/16) and the heat value of the spark plug (NGK B8HS or Bosch W4AC) must be correct. The compression ratio of 10,7:1 is equal to the conventional 75/85cc DR cylinders.
An ideal addition is a carburetor kit with Ø19mm passage, a racing crankshaft and a 3.72 primary gear ratio. With this the Formula easily reaches the 70km/h mark.
AI-translation
€120.00 *
incl. VAT plus shipping costs
Available immediately (delivery time 1-3 working days*)
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For this item you get
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| General | |
|---|---|
| performance class: | sport |
| Gudgeon pins | |
| diameter: | 12 mm |
| Spark plugs | |
| thread type: | M14x1,25 |
| thread spark plug: | short |
| heat rating NGK: | B7HS |
| Cylinders | |
| displacement: | 75 cm³ |
| bore: | 47 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: | |
| number of transfers (incl.boost ports): | 6 |
| number of boost ports: | 2 |
| shape exhaust port: | single port (oval) |
| exhaust mounting: | flange |
| flange type: | 2 studs |
| exhaust bolt pitch: | 52 mm |
| thread exhaust studs: | M6 |
| Crankshafts | |
| stroke: | 43 mm |
| Pistons | |
| number of piston rings: | 2 |
| production method piston: | cast |
| Piston rings | |
| piston ring type: | common ring |
| thickness rings: | 1,2mm |
| Circlips | |
| circlip type: | G-type |
| wire size of circlip: | 1,0mm |
| Cylinder heads | |
| cylinder head type: | one piece |
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