Thanks Curare, very interesting to hear your experinece with the heads.
I will pass on your findings to the guys I know who run malossi. Where can someone buy a stoffi head?
I would also be interested to hear the result if you run the pinasco head on the polini.
I will have to wait until the worb5 longstroke heads come back into stock!
Meanwhile I finally got my engine back into the frame late last night, so will be heading home for first test ride at lunchtime.
I used the worb5 head for standard stroke, and added a 1.5mm gasket under the barrel. I also used a .5mm gasket under the head, just to be sure.
As for the flywheel. I used a standarrd PX elec start one, but removed the ring gear and had the flywheel machined to remove weight.
I’ll let you know how it runs.