D.R./OLYMPIA 177 cc cast iron cylinder - stable all-rounder with power reserves for everyday use, touring and long distances.
The big brother of the 135cc D.R. offers significantly more displacement and reserves for problem-free everyday use. Unlike the small 2-stroke supercharger, the 177 also makes noticeable gains at higher engine speeds - mainly thanks to the additional secondary exhaust ports. The relatively low compression ratio also ensures very good-natured temperature behavior and makes the Cylinder a reliable companion on long journeys.
- Solid cast iron cylinder with 7 transfer ports and additional secondary outlets.
- Reliable long-distance tourer thanks to moderate compression and good-natured thermals.
- Can be flexibly combined: from a plugged-in touring setup to a more powerful tuning setup.
- OLYMPIA 177 as an identical alternative to the D.R. in the event of supply bottlenecks.
The D.R. 177 can initially also be run on Engines with only two transfer ports "plugged" if the third transfer port in the Cylinder is closed via the Gasket - this already results in a significant increase in performance compared to the standard version. In conjunction with a POLINI Cylinder Head and transfer ports adapted to POLINI-177 dimensions, the setup becomes significantly more powerful, although not quite as indestructible as in the absolute touring trim. Longer primary ratios and exhaust systems such as SITO Plus or SIP T5 have proven their worth; for more rev-happy setups, the GRAND-SPORT Piston in combination with an MMW MALOSSI Cylinder Head is the ideal complement. The OLYMPIA 177 is identical in construction to the D.R. 177 and is a fully-fledged alternative if the D.R. is not available.
Technical details
Cast iron cylinder, 63 mm bore, 57 mm stroke, 7 transfer ports, 177.68 cc, exhaust with two additional secondary outlets. Piston with two Piston Rings, original D.R. Cylinder Head included, including Gasket Set. The Crankcase does not need to be machined in the first step, but the jetting and ignition settings should be checked and adjusted to the new setup. Modification of the lower cooling fin is required for Elestart models.
Conclusion: Top all-rounder in very good quality and a real long-distance tip.
SIP-TIP!
- Main Jet adjustment and new Spark Plug (W4AC) are mandatory, Ignition setting approx. 19°, harmonizes well with Carburettor SI 24/24, Italian RAPs/SIP Road, longer gear ratio, Racing Crankshaft and SIP Performance Ignition/HP4 recommended, 28mm Carburettor and SIP / JL RAPs are the DR's secret dream !
"Very good kit for simple tuning. Good torque. With 24/24 SI and standard gearing about 125 km/h possible."
-SIP customer Massimo M., Switzerland:
SIP TUNING LEVEL 1-2/ROAD-SPORT
A powerful, high quality alternative to the more usual 2-transfer port cylinders available are our reworked OE PIAGGIO VESPA PX125/150cc cylinders, as well as the even more powerful 2-port version of the 177cc cylinders produced by POLINI and DR. The boost ports of these cylinders have been sealed and the transfer of fuel gas is provided by the ports of the same name, located on both sides of the bore. No further modification of your crankcase is necessary for immediate use of these cylinder kits, making them the ideal plug and play tuning option for all VESPA 125 VNB/GT/GTR/150 VBA/VBB/GL/Sprint/T4 and Super models. If your crankshaft has a bush, instead of a bearing at the small end, it will also need replacement.
Conclusion: Attractively priced cast iron cylinder, ideal for your daily runabout. If you wish, this cylinder can easily be further tuned with the addition of a 24mm carb, a reworked inlet port, a race crankshaft and a SIP Road exhaust.
SIP-TIP: For added power and reliability for your touring setup a race crank, expansion chamber exhaust, 24mm carb and an electronic ignition kit from SIP PERFORMANCE by VAPE can be included.
Robert Kremer, ScooterandSpareparts Kissing, November 2011:
"I built this reworked POLINI 2-transfer cylinder into a scooter for one of my customers. He is more than happy. The scooter accelerates strongly and is also very reliable over long distances. A more than adequate alternative to the PINASCO version."
