Last week I went through and did a few things to the bike, 2002 B12, threw on a Delkevic bolt on silencer and also put in the holeshot stage one jet kit, modified the air box and put on the 5° timing advancer. I started riding it after letting it warm up to see how it runs on the base line settings in the instructions 107.5 Mains, 3.75 turns on mixture screws and 5 shims under the needle. After a little bit when I was sitting at a stop light it was running a little off and I could hear a slight knock coming from the tail pipe. I am running 89 octane fuel in it as recommended and I will admit I am still new to carb tuning and I am wondering if this is a fuel knock that might be caused by being rich at idle? I have a video I can get up later if need be to better explain the issue. The valves are within tolerances and it only started after the jet kit and silencer
Anyone have any potential insights?