hey all
i just recently picked up my bike from having a power commander installed and tuned, bike runs alot better (smoother than before). had always had problems with it running rough going slow or around town

today when i left from work , started the bike and noticed it sounded like a diesel, cleared up after a couple of minutes, i must admit i had a LITTLE PANIC ATTACK, but wrote it off as my ears

got the bike home and let it cool for a few hours went and started it ,same noise only went away faster , i would call this a knock. it never did this before so i am making an assumption that it has something to do with the tuning, i will call the guy who did the work and so far i have full confidence he will do what is necessary

if you guys could give me a little education i would feel alot better understanding this

thanks guys

 

My 09 Ultra has started the same noise, bike has to sit more than 6 hours and noise only last 10-15 seconds...

I am thinking a bad lifter pumping up... I'm putting a foursome of Bob Wood Directional Knight Prowler lifters later this month (will see if noise goes away)..

Dennis in SC

 

some ecm's dont fully come "alive" until your motor has reached a pre-determined temp. whether its timing or fuel they usually have a warm up period before they incorporate all the adjustments. For example I have a zippers unit and the idle rpm will stay around 1200 until the motor reaches its operating temp then it comes down to 900 rpm. I am not sure if the PC has this function or not but maybe the upgraded tune just made it more noticeable.