I'm not sure who's bike that was that Dave was setting up, what the final squish or compression ratio was that it ended up at either. It was definitely a 300 though. I'm sure the post is on DBW somewhere but he has confirmed it on the phone for me too.
Mine is a 250 with 45:1 Amsoil and BP 98RON. Yep!
Edit: Found the post and quoting the man
"I recently did a 13 gasser 300, removed the high comp s3 head, installed the stock head again with corrected squish clearance, angle and comp ratio and made way more power everywhere. The main thing was that on the dyno I was able to drop the main from a 178 to a 165 and it ran brilliantly. Just pulled it down after 3 fairly hard hours and there's no signs of overheating or running lean. The rest of the specs were 40 pilot (runs rich down low, starts without choke, could get away with a 38) and necj needle #3 clip.
I'm not sure I'd try these on a stock head but it seems the gassers can take similar jetting to the KTM's when set up. Ill post up if this bike needs to be richened up in the future."
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