Hey was hoping if someone could shed some light on a question I have. I have the GO .25 6 port and have been having proplems with the motor losing its tune after it cools down and then is restarted , it has no top end for the straight aways but enough grunt power on the infield of the track. I have totaly sealed the entire motor right down to the slid carb boot ? About an hour ago for kicks and giggles I pulled the motor pluger off the carb and exhaust and with a long piece of fuel tube on the fuel inlet nipple I put the motor under water and blew into the tube and a ton and I do mean a ton of bubbles came out of the front bearing. Could this be the cause of the tuning issue im having? And if so has anyone have this happen to them ? And just and f.y.i the motor just finished its first gallon of fuel and that includes break in. The motor only has about 6 races on it and none of them were toyaly completed due to the problem I was having. If anyone has and ideas or help please let me know i would be very greatful..