Threebond 1211 works very well and is very easy to manage as its more of a liquid... i tried this on a Picco .12 along with a slightly worked crank and sleeve. I seem to have had trouble with keeping it idle at first but after about 20 min of breaking the motor back in and running some fuel through it, well it worked.

Increased bottom end was noticable, high end seemed the same and most of all an increase with overall run time of almost 12-14 minutes on one tank(75cc?)