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Polini reed crankcase For Race for Piaggio Ciao and Si
Polini studies a new reed crankcase to house cylinders with 3 or 4 studs.
Big news from Polini house, which adds to its already rich catalogue the Polini reed crankcase For Race for Piaggio Ciao and Si.
As per Polini DNA, the study and the production have the goal of increasing the performance, above all concerning the reed engines, which were born with limitations due to their original housing.
The intake of the Ciao is very reduced and only Ø15 carburetors can be fitted: with the new Polini reed crankcase For Race it is possible to mount carburetors up to Ø21 with an adequate flow, which allows better performance and greater grit to the engine.
The crankcase is made of die casting aluminium and has been studied to fit both Piaggio Si and Ciao. Both models need the pedals’ removal. The SI does not require a modification for the engine housing, but the Ciao needs to slightly enlarge the original frame opening.
The new Polini reed crankcase For Race for Piaggio Ciao and Si allows housing both 3 and 4 stud cylinders, but Polini suggests using 4 stud cylinders.
It is possible to assemble the new engine crankcase with the original electronic ignition, but Polini suggests using its own and full circle crankshafts.
The carbon reed valve has 4 petals, while the rubber manifold can be fitted both on Polini CP or DellOrto PHBG carburetors.
Soon, it will be possible to match the crankcase with the new Ø47 cast-iron Polini cylinder.
Part number: 170.0201
100% Made in Italy