Hello again, I just took my 883 for a spin and she's pinging. I put a 1200 kit on her 10:1, along with cams and smoothed out the heads. Today was a test run and she's mean, but I noticed severe pinging at take off and some under load at at slower speed w/higher gears. I drained the tank a put super in her and played with the timing, she still does it. Can anyone tell me if I need to change the jets it has a 170/42 in it now, a friend gave me a 190 and 200 , if I need new jets can I use the 190 with a stock slow jet? Thanks everybody.