Purchase one tuning license for each Yamaha PWC that you are programming with the Map Tuner X hand held programmer. This license gives you access to RIVA's world famous tuning library along with unmatched technical support. Easily switch between performance tunes and then back to stock settings if you wish. Tuning licenses are VIN specific once they are activated and cannot be used on another vehicle. Tuning Licenses are emailed directly to purchaser and are non refundable once activated.