Vintage Vespas

This page is only included for interest. We are not offering this conversion at present due to workload.

It is unlikely we will be able to offer this conversion for the forseeable future.

	MB Developments occasionally turn their hands to work on older Vespas. This head is from a Vespa SS180. This offset head was used on many old Vespas and some early type P ranges. We have modified this head for an SS200 big bore conversion we are doing for a customer of ours.
	SS180-200 cylinder conversion, this shows the road tuned inlet port. The SS180 was the last of the piston ported Vespas, after this all Vespas were rotary valve only.
	To convert the 180 barrel to 200cc we needed to bore the cylinder out to take a 66.5mm P200 piston. This piston needs a hole welding up to allow the inlet port timimgs to work.
	This is just a view of the basic porting layout of the SS200 cylinder.
	On the left is the standard (seized up) SS180 piston. On the right is a modfied and welded up P200 Asso piston as used in the MBD SS200 conversion.
	Picture showing the modified and road tuned exhaust port of the MBD SS200 conversion.