just got a leo vince zx for my nrg power im looking to get a 70 kit next to go with it its down to the cast polini and malossi kits both are air cooled kits. Ive been told that the polini and zx run well together but dont know how true this is ? so what do peaple think has anyone had a similar setup ? any advice would be great. here are the two kits http://www.pedparts.co.uk/product/336/piaggio-malossi-cast-iron-70cc-kit-air-cooled http://www.pedparts.co.uk/product/140/polini-sport-70cc-cylinder-kit-piaggio-air-cooled cheers