Need to raise funds for my winter project of long stroking my SP09 motor so a few things have to go I have for sale my spare Autisa aluminium top end and the one off expansion chamber that I built for it. I have raised the exhaust port to 180 deg and I have also done some work on the transfer and boost ports. The kit is set up with a Pinasco single ring piston and modified Pinasco head. Exhaust is designed to give max bhp at 8K and a good mid range . Set up ran really well and will do over 70mph with a nice wide power delivery and is perfect as a fast road/touring motor with a decent crank and carb. Piston cost me £55 from Sip and also have a new spare ring though the one on it has done less than 300 miles. Looking for £160 (price of a mazzy 54 crank) for the two so PM me if you are interested and I can send more photos.