I mean.... My Gilera XR1 lacks power! .... about 8000 rpm in 6th gear, .... about 8300 rpm in 5th gear..... .... and so.... until at 2th gear where I reach about 9000 rpm.... Lacks 2000 in 6th gear! Chainweel and sprocket, are in original dimensions and teeth..... Not enough power..... I think that I must to set better APTS exaust valve! I'll try to take apart it next weeks...... My God!