O.K. folks, I am not a Venture owner, my son is. He bought an 84 XVZ 12 DL. Has complained about high speed stability from day one. I just returned from a short ride (about 75 mph) on I 75. The bike feels as though it's riding on rain grooves or a draw bridge grate at these speeds. I wouldn't take a long distance trip on this motorcycle if you paid me. We need some help,,, Please!
A bit of background. Both my son and I are long time performance auto mechanics. Rob just mounted a set of Shenco Tour Master tires. Re- packed/ replaced wheel bearings, replaced brake rotors, removed and greased final drive splines, checked and adjusted steering head bearings ( set with a very slight drag with wheel off ground). We've checked swing arm bearings (no play) and I went over the rear frame with a flashlight looking for cracks (yes, I had my glasses on). The only way he'll ride is with the rear tire at 45 lbs. the front at 37. Though keeping the tires over inflated (my opinion) helps, this thing is almost scary. My Eleven is more stable over bridge grates. What do we do/ look for? Any help will be greatly appreciated.