after break in you want to turn the highspeed needle about a quarter to half turn to give the motor a little more power, just remember clockwise= more power but higher temps, counter clockwise= less power but cooler runing, motors arnt ruind by runing them too rich, there ruind by runing them too lean, so the first thing u need to do is buy a new temp gun, a general rule of thumb is the motor should be runing under 300 degrees if its 300 or over the motor is too lead and needs to by richend up (by turing the screw counter clockwise), but remember when making adjustments to the carb always do it in quarter turns or less NEVER in full turns. and if u screw it up u can start over by screwing the needle in clockwise till it starts to tigten up, and then bring it back out about 2 and a half turns. go to www.towerhobbies.com did that make sense or just confuse u lol?