I recently rebuilt this motor and just about completed the 10 hour break-in period. it has now started to overheat. it only overheats when planed out, at idle it is fine. i removed the thermostats and poppets to see it there was a problem there and it still overheats. when i rebuilt this motor i cleaned and flushed all parts and passages really well. one thing is when i test the head temperatures with the IR gun i am getting about a 15 to 20 degree difference. the port head is running hotter. temps are around 130 + 145 at idle and 155 + 175 while planed out. before it eventually overheats. any ideas on what may be causing this? also even though i now am not running the extra oil in the gas for the break-in. just the oil in the vro, the motor smokes extremely bad at idle. Is this a sign the vro is shot ?
