Hi. More questions from me.

In my quest to collect parts to build my B31 racer i was in touch with a supplier i am buying a cylinder off asking if he had any heads.

He didn't have any but as i was asking for a big fin item he went on to recommend i look for a small fin head as his opinion is that you can get more power out of them.

His reasoning seemed to be that the casting around the port is thicker so there is more scope for getting the port shape right.

Does anyone here have any input on this?