I was reading this webpage http://www.hpbikes.com/news.php and it was talking about compression ratios. Its says he is looking at running a static compression ratio of around 16:1 compared to the stock 125 of 12.9:1. Is it really possible to run a 144 at 16:1, and still benefit from the compression? I would have thought that all extra power would mainly be lost as heat. Also would pump gas handle this? I am about to modify a stock YZ125 head to fit a Athena 144 barrel. The athena head is too lightweight, gets hot, distorts and dumps the gas into the radiators (thats my theory). so ill machine some o-ring grooves in the barrel and see how that goes with the stock head. Also, I was thinking of making a stroker crankpin, anybody done this before? i was either gonna make a whole new pin or build one up with weld and machine it..