For installation, no structural modifications to the motorcycle are required for use of the product in an approved version. It is recommended to read the instructions in the package or the tutorials visible on and on youtube. For on-line purchases it is necessary to activate the warranty by sending the special coupon stamped by the installation workshop via email to , for purchases at physical stores the shop stamp is sufficient. The exhaust has a removable dbkiller (noise restrictor) for racing use, remove the dbkiller is not ONLY illegal, but the customer assumes the responsibility to use the motorbike as on the circuits only, without bags, without Flash light and number plate holder or other parts that would conflict with the different angle of the gas following the transformation into the racing version. Abuse of this situation on the road will result in the loss of the product warranty and any refund request will be rejected. GPR cannot provide a new silencer instead of the one to repair, the client has to accept to remount the original exhaust or wait the standard time for the reparation.