need help, i just rebuilt my 01 660 with a 11:1 wisco piston and put 03 tranny. I put motor back in and at idle after start up it will lock up stall almost like u engage first gear and engine stalls! I spun motor by hand there is no bind and machine fires right back up no problem i find when hot it idles much longer before stall, and when cold it happens maybe every 20 sec or so, when hot maybe minutes. Any suggestions before i take it apart again? There is no abnormal noise when running or scraping noise, and when driven in gear does not stall, will stall with clutch pressed in or disengaged.