High-G FJR Junkie!
Join Date: Oct 2005
Location: Australia No fixed address
My old dad explained it to me perfectly about 50 years ago. With the front of the bike jacked up until the front wheel is off the ground, tighten the steering stem nut until there is no play in the bearings, but leave it loose enough that the steering will fall from side to side under it's own weight.
To check for play in the bearings, grasp the fork legs down by the axle, and pull/push vigorously, you will feel clunking if the bearings are too loose. To check for damaged bearings, hold the handle bars and slowly turn the steering from side to side, you will feel uneven movement and graunching if there is any wear or damage.
There is nothing worse than steering head bearings that are too tight. When riding in a straight line, the bike will start a slow weave that you will find impossible to stop.
FJR Models owned from new, 2001, 2003, 2006, 2009, 2011, 2014.