Hi Rysium,

I'm in the UK but over the last couple of weeks did a Poulan 25 converion for my Cermark Pitts biplane, and it had its first flights last weekend. I have done quite a bit of tuning of two strokes in the past so did this just for fun really, I did a pretty mild tune on it and still run the std carb and a modded std exhuast and it turns a 16x8 at 8500 running 2% synth oil in normal pump petrol and the standard magneto ignition. I wanted a nice running super reliable motor, but I'm trying to get another so I can do a balls-out tune, I reckon 9500 on the 16x8 is possible but I might break one or two engines on the way to getting there

If you want a step by step how to do this its here:

http://www.*************.co.uk/4um/i...?topic=19374.0

sorry to post a link to another forum here, but it you want the info you'll need to read that thread. Forget the first few posts as they cover a different engine, but from about post 10 to the end is my testing and development including all calcs to determine the porting etc.

Happy reading, let me know what you think.

Cheers,
Rich