The King of the 177cc class. POLINI sets the standards with this old school classic, the one all cast iron cylinders have to measure up to.
At the plug and play level, this is a powerful cylinder, and with a 60mm long stroke crankcase, can reach 187ccm - incredible! 7 powerful transfers with a triple boost port feed the cylinder. A generous exhaust port and solid ASSO pistons create a solid support.
Power plus starts in the lower ranges. No problems here with changing up gears. With a longer transmission can operate well as a touring cylinder. If you like, the 20mm carburetor can be replaced with the big brother 24/24 SI, and at least, mount a racing shaft. More power and dependability can be yours by adding combustion chamber and compression optimized MMW MALOSSI cylinder head and the GRAND - SPORT 177ccm piston. A larger racing exhaust, carburetor up to 30mm and a modified outlet will pump up your performance even higher, max around 125 km/h, and bring tears to your eyes.
Conclusion: Robust, hefty torque cylinder for daily use. An absolute all-rounder.
Cast Iron/ 63mm Bore/ 7 Transfers/ 177.68ccm
Cast iron cylinder, 57mm stroke, 7 transfers, piston with 2 thick piston rings, original POLINI cylinder head included in delivery, compression 10.6:1, delivery includes set of gaskets. Jets and ignition should be adjusted. The motor casing should be modified to fit the larger cylinder transfers.
SIP-TIP: W4AC spark plug, ignition timing approx. 17-19°, HD SI 20/20 105-110 are a must, carburettor SI 24/24 or 28-30mm, Italian/SIP/J racing exhausts, longer transmission, light flywheel/Vespatronic and race/long stroke crankcase are recommended, full circle /flowed crankshaft and 30mm reed valve carburettor to bring tears to your eyes on the freeway.
SIP-customer Gerhard J., Austria:
"Absolute optimal, drives like a dream on long distances."
"Drove the 177er, 28er and Sito Plus 4300 km from Landsberg in Bavaria to Greece. The cylinder took everything in stride, not a single problem!"