. If that's not enough for you, there's now the Polini BIG EVO for the
. This modern racing cylinder means a full
of Vespa Smallframe models such as the V50, 50N, PV, ET3, PK etc.. So you don't need an extra engine case!
With Ø60mm bore and 54mm stroke, as well as very ambitious head angles straight out of the box, the Polini is a serious contender
Based on the very successful Polini EVO 133, Polini has put together a super package that was created for performance
INLECTOR
The Polini kit contains the complete intake tract, consisting of: large diaphragm intake, intake manifold and connecting rubber. The 6-valve diaphragm is equipped with 0.4mm thick plate material. The intake manifold is designed for use with a Ø34mm carburetor cross-section (carburetor connection width of the rubber is Ø44-45mm).Modifications may be necessary in the area of the frame cut-out for the carburettor
.
PISTONS
The Polini tuning set for Vespa uses the well-known Asso piston from the Polini Aprilia AF1 kit, as already used by FALC Racing in its 153cc cylinders (we can highly recommend the very high-quality Ø60mm Wössner piston from Overrev as an alternative).CURB SHAFT
Any shaft with a 54mm stroke and 105mm connecting rod length can be used as the crankshaft.The connecting rod length not only benefits the better connecting rod ratio, but also reduces the necessary housing adaptations for the overcurrent channels to a minimum.
SPINDLES
The engine housing must be spindled out accordingly for the necessary crankshaft with 54mm stroke.
CYLINDER HEAD
The cylinder head is bolted with 4 screws in addition to the conventional bolting, using the continuous (longer, enclosed) cylinder stud bolts.Very interesting alternative for normal engine cases to the often unavailable FALC racing cylinders. If you are looking for power well above 25 hp, you will find it here!
DE | €
