Malossi 166cc MKIII cylinder kit for Vespa PX125 scooters.

Malossi constantly refine there cylinder kits over the years, but they have took a big step with this kit. Almost all of the ports have been further upgraded compared with the earlier version. The biggest difference you will notice is the cylinder head, starting with the fins which are now curved and more winding. This will maximize cooling and improving operating temperatures. The kit also includes two centering bushes for the cylinder head to get perfect fitment with the cylinder, this is only separated with a single o-ring to achieve maximum heat transfer. 

Spark plug: NGK BR8ES/ B8ES

Malossi 3117181