[(F5)]

I run 0.5 on my 50 if that freaks you. Never hits despite 14,000 rpm.

I ran 14:1ish on the 200.


True to my word I took the head off the 300. I found the squish was a wedge shape. 2mm at the edge & 3mm at the inside of the squish. (my solder was only 2mm so I missed that until I used plasticine).

The piston has ~9* angle & the head ~ 13* Sheesh! talk about going for a low MSV.

I'm going to angle it 10* & close the squish down to ~1mm. This will raise compression waay too high so I'll pull out a few cc to bring it back to 12.5 - which is easy for me to kick, as I'm 5'8" & my swing loses effect when in a tricky trail section.

I threw it in the lathe & just scratched the anodising to see how flat I might make it but with the wobble in my poor old lathe I thought better of it & its going to a shop to do the flat surface. I'll then be happy to take area out of the bowl on my lathe & do the measuring.