Hello everyone,I have an Aprilia Af1 Futura since 1991, 34HP, I have a big problem whith it! I bought it from Hughary and about one week after that my engine broke down. I was driving at 140km/h and suddenly the back wheel blocked. I realised that the piston(Kolben) and the piston rings were cracked! I bought these parts from Austria and a made it work! After 400km the engine blowed again! My answer is: WHY? If anyone here could tell me about the problem I would apreciate it! E-mail me: fporutiu@yahoo.com 
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