What do you think about the new Fabrizi cylinder kit? It's bore is 47,6 mm the storke is 47 mm (the cranksahft's conrod is 85 mm). It's 25 horsepower (this data is from Fabrizi homepage)
I found this pictures at Fabrizi site (at the Novita section), but you can find more new products with pictures.
The new cylinder kit (this is the Piaggio one):
The new Full-circle gokart-type crankshaft with 47 mm stroke and 85 mm conrod (Minarelli):
Twin-spark CDI:
Twin-spark cylinderhead:
Exhaust 2006 Minarelli:
Membran kit for Minarelli:
I found this pictures at Fabrizi site (at the Novita section), but you can find more new products with pictures.
The new cylinder kit (this is the Piaggio one):
The new Full-circle gokart-type crankshaft with 47 mm stroke and 85 mm conrod (Minarelli):
Twin-spark CDI:
Twin-spark cylinderhead:
Exhaust 2006 Minarelli:
Membran kit for Minarelli: