Hello everyone. This weekend I jetted my carburetor, eventually settling on a 66 mm jet. The performance improved noticeably, but I'm worried I'm running lean. The problem is that I don't know what I should be listening for. I'm somewhat aware of what "bogging" and "four stroking" sound like. What I know know is that as I get up to speed I hear some popping, but when I'm WOT I hear only a quieter "whirring" sound that isn't quite like bogging but certainly isn't the constant 'brrapp' sound I'd hear before the rejet. It's a constant, monotone pitch, instead of a 'pop pop pop' sound. Is this right?