With the 133cc cylinder, too, D.R. follows traditional paths and produces an extremely durable cylinder that is in no way inferior to the originals in terms of durability. A very good-natured cylinder which does not fail even on long distances.
Due to the relatively low compression the D.R. can be operated with regular gasoline. Very nice are the thin 1.5mm piston rings, which do not get in the way of higher speeds.
So even a D.R. with a suitable racing shaft and a reasonable exhaust can develop an amazing performance. The performance then almost reaches Polini values, which justifies even larger exhaust systems like the VSP Inox or the Hammerzombie.
| General | |
|---|---|
| performance class: | sport |
| Gudgeon pins | |
| diameter: | 15 mm |
| Spark plugs | |
| thread type: | M14x1,25 |
| thread spark plug: | short |
| heat rating NGK: | B8HS |
| Cylinders | |
| displacement: | 130 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: | |
| number of transfers (incl.boost ports): | 5 |
| number of boost ports: | 3 |
| shape exhaust port: | single port (oval) |
| exhaust mounting: | flange |
| flange type: | 2 studs |
| exhaust bolt pitch: | 54 mm |
| thread exhaust studs: | M8 |
| Crankshafts | |
| stroke: | 51 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: | 1,25mm |
| Cylinder heads | |
| cylinder head type: | one piece |
| OEM numbers (for comparison purposes only) | |
| Sonstige | 10008000 |








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