It's interesting, it doesn't fourstroke at all like a normal twostroke. it reminds me a lot of my uniflow engines with a linear power delivery. The uniflows didn't run chambers as such though, this sleeve engine does have a sort of a power band. It doesn't seem to have a lot of power (maybe 15HP, Ryger need not worry) but it will rev out (just like not having a chamber), I've adjusted the timing a little and will manufacture some exhaust inserts. I think I've still got Gerbalgronks Go Pro so I'll have a go at videoing the next run so long as it doesn't poo itself.
It's running CR250 V Force reeds (don't ask, they were just available) and has a massive (volume) crank case, I'm sure these don't help.
I'm not to disappointed I do remember the 350 when it first started out being real gutless, so with a bit of time we might see 20HP!
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