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Complete Race Ready Engine Polini P.R.E 70cc Piaggio (Disc)
050.0947
New
THE FIRST POLINI EVOLUTION RACE READY SCOOTER ENGINE developed with advanced Moto GP solutions, and proper for Piaggio ZIP SP, is dedicated to the real riders. Riders who have the race track in their DNA, who do not know any difficulty, who are not satisfied with best but that ask for the maximum power. Riders who feed themselves with real passion; who live the scooter races on the circuits with only one goal: to win. Polini Evolution crankcase for Zip SP with 10” wheels is born from a deep study that has not only involved the crankcase design, but the entire engine group with all its integrated parts. It does not have middle way but only technical choices made to achieve “no limits” performance.
More info
Many the technical features:
• Light alloy crankcase with a new engine mount that optimizes the exhaust shape going out from the cylinder. The mount is fitted on two bearings that enlarge the frame and improve torsional resistance. Two the exhaust systems available, both hand made in special steel: one for the 70 cc engines and one for the 100cc ones.
• The bearings housings have been enlarged and improved with specific features to house the crankshafts with bigger diameters and width. Two crankshafts are available according to the displacements.
• The reed valve housing is bigger to permit the use of different carburetors, from 19mm to 28mm or with even bigger chokes. The thickness of the valve carbon reeds will be specific according to the engine displacement
• Cylinder fixing system with two flanges. Two different cylinders cast in light alloy, water cooled, one d. 47,6 and one d. 50, derived from the 125 GP Polini engine that took part to the Moto GP World Championship. Coolant flow through the Close deck system. Barrel with nickel - siliceous coating. Five transfers with highly performing diagram. Transfer with central bridge to optimize the exhaust gasses emission. Light alloy gravity-cast piston at high siliceous content with chrome piston ring. The head is exactly the same used for the 125GP engine, with 6-screw fixing system, squish and special combustion chamber. It is compulsory to fit the electric water pump.
• The crankcase inside geometry has been studied to have more space for the transmission group. The aim is that to use the new belt with bigger dimensions both for the length and the width so that to transmit as much as traction power possible. The gear case lets the assembly of the intermediate shaft and of the wheel axle on the bearing while the case cover is the original one.
• The ignition housing has been designed to be used both with a light flywheel, mainly recommended for the 70cc and with heavier flywheel, recommended for the 100cc.
• The Torsen WD, machined for a block, offers the possibility to use two braking systems: - The first one is the classic drum brake and original rim - The second one is the brand new hub support in stainless steel that lets you install the wheel rim with d. 180mm brake disc. And the housing of the Polini brake caliper with 2 d.32 pistons. Hub, rim and brake caliper are all machined from a block. It is also available the front rim with d. 200 disc brake, lighter than the original one
Attention !
The following parts are sold separatly :
FRONT RIM
FRONT/REAR BRAKE CALIPER
FRONT BRAKE HOSE
REAR BRAKE HOSE
BRAKE CALIPER COOLER
FRONT BRAKE CALIPER SUPPORT
FRONT/RIGHT BRAKE WITH LEVER PUMP
EAR/LEFT BRAKE WITH LEVER PUM
WATER PUMP 12 V.