Kit 70cc Ø47,6mm POLINI BIG EVOLUTION for crankshaft connecting rod long 85mm minarelli horizontal liquid (nitro, aerox, ...)

The famous BIG EVO of POLINI with its performances of follies, engine of 69,76cc respected, ideal for run run or competition 70cc! It is to use with a crankshaft race 39,2mm as the origin but in long rod to reduce the forcing (85mm against 80mm for the origin). You will be able to use a crankshaft POLINI, MALOSSI, BIDALOT in rod long 85mm for axis of piston of 12mm. Apart from that, it is therefore an aluminum cylinder 6 transfers of admission, exhaust port, very high diagrams! High compression cylinder head, cooling system well studied! To accompany a racing variation, a BIG EVO muffler, a 25 to 28mm carburation, a variable advance ignition, racing valves ... The kit is delivered with gaskets for do the squsih, the studs, the needle cage, the centering bolts breech, ... Special exhaust outlet has 3 screws! Exhaust BIG EVO almost mandatory or personal editing!

Mounts on :

2 stroke engine scooter minarelli horizontal liquid
Motor 2 Time scooter minarelli horizontal air spent in liquid (long only)
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