TWM Quick Action CNC Billet Fuel Gas Cap with Red Handle Fits Aprilia RSV4 TUONO V4 RSV 1000 FACTORY R APRC First class Italian engineering and machinery from the Marchesini family! Quick release gas cap as used by top AMA and European Race teams. Precision machined from billet aluminum and finished with high thickness anodizing. Incredible weight savings! These fuel caps weigh in only at 135grams (4.76oz), as opposed to the factory Aprilia cap that weigh in at 490grams (17.28oz)! Beware of replicas, TWM is the original inventor of the quick action fuel cap!