Grand Prix 250
Main Motorcycle: 2011 Bonneville T100
Join Date: Sep 2009
Location: Western North Carolina
Other Motorcycle: 2010 Scrambler
Extra Motorcycle: 2009 DR650SE
I can vouch for the tension between the anti-backlash spring and the cam gear. The first time I had to change valve shims I used the screw and nut approach, but with one that was much too small. The spring pushed back and the screw was at about a 45 degree angle due to the pressure. I thought it would be a good idea to pry on the gear with a screwdriver to bring it back into alignment. This while holding the cam in my left hand. Of course, the screwdriver slipped, causing the screwdriver to spear my hand, passing all the way through and out the other side. I pulled the screwdriver out and tried to stop the bleeding with my cleanest dirty shop towel, noticed blood continuing to accumulate on the floor, and realized what happened. Fortunately, it missed the bones and major blood vessels. Just a reminder to be careful, especially if you aren't sure what you are doing.