No you can't run that without a rejet...
I'd recommend adding at least a foot of pipe with the baffle,... and with that, you'll still see significant loss of torque, finicky jetting, and obnoxiously loud...
Straight pipes are for drag racers.... only good if you want to launch at 4,000 rpm every time you take off...
Your clutch can handle 2 or 3 of those, and then it heats up and wants to take a nap for a while...
Normal take-offs will feel like a 250... a very loud one!...
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