Hi all, I am a new member here. I just want to ask my bike don't have any problem hesitate or bog with stock muffler or slip on muffler from stop to take off. I try to shim 1 washer each needle but my bike is not rev as stock jetting, then I try to add 1 washer again, but at 7k rpm, they like hesitate then rev to 10k. So my question here, should I shim my bike?
thanks.
ps : mixuture set L (2 1/2), R (1 3/4). PJ 38 MJ 98
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