I got a 400 that I cant get to idle. I have replaced the reed with a vforce reed body set. I cant find any leaks on the rubber to the carb. and have cleaned the carb several times. any help would be appreciated. I can also get it to run great at mid to full throttle. compression is at the min of 135. also replaced the plug.
Thanks
Randall

 

found my problem, tore down the top end and found the bottom 1/3 of the piston GONE. I am sure suprised it still had the compression it had.
Randall