ginper

Hi - New to Seadoos and this forum.
Does anyone have any ideas on twins running out of sync? At 3000 rpm both engines are the same. At 4000 on the left, the right is at 5000. At 6000 on the left the right is at 7500. I don't think it is a tach problem because I have to hold a lot of steering against the right engine at higher revs.I tried to explain to the local dealer who said they tuned them with the computer but that was at idle and did not fix the problem
Thanks