Hi.. I owe an Yamaha xmax 250 of 03/2012 I'm interested in buying some Dr. Pulley sliding rollers of 11gr.... the origin weigth is 12gr.. i think that 11gr is the best mod for it right?? Appart of the Rollers i need also the sliding pieces?!? Can you please help me in what reference should i buy? thanks for your help! Hugo
