Does anyone have any photos of the steering head bearings and assembly for a 2004 ZX-12R? My 2004 ZX-12r started to have some front end shaking after about 6500 miles, nothing too serious though. When I took my hands off of the handlebars sometimes there was enough shaking that I had to put them back on. I changed to new tires because to old ones were worn (same type Dunlop 208ZRs) and the shaking still happens but not all the time. The dealer changed them, not me. I took the bike back to the dealer thinking that the front tire was out of balance. The dealer rebalanced the front tire but the front still shakes sometime. When I rock the bike back and forth with the front brake engaged, I can feel a dull thud through the handlebars. A friend of mine told me to retighten the steering head bearing and to torque them down past the manufactures specified torque value. Can I do this or will it break something If I go maybe 20 FT-LBS. with that spanner wrench I canít tell how far is too far anyway.
I did notice that the service tech have to use about 7-8 times as much counterweight to balance the new tire than what was on the rim for the old tire. He claimed that some weight had fallen off when I went back to the dealer to have them take a look at the shaking again. I found that odd that it would take that much more weight to balance the tire. I did notice that at lower rpm the front end doesnít shake sometimes. I used the string method to align the wheels and they seem to be in line. Any suggestions as to where to start looking for the problem would be appreciated.