Hi guys new to bike tuning thought i would ask before i get myself into some trouble. im about to purchase a bike with a aftermarket full exhaust (header/mufflerï¼‰and i believe it is tuned with a PC now i need to get RWC so i guess i need to put the stock back on. my question are : 1, will the stock exhaust setup stuff up my bike in any way for daily riding while the PC is still in? 2, is YES to the above question, can i unplug the PC and will my bike be running back to stock tune again?? 3, if i plug the after market exhaust back in, will the PC remain in the same tune map setup as before or do i need a retune ?? 4, if i install the same PC and same aftermarket exhaust onto another bike (same model, year etc as mine) will the tune map stay the same and no tune would be required?? cheers guys, really new to this so hopefully someone can answer my questions appriciated!