Just a trivia item about handlebar riser clamps.
On the period Hondas, one side of the upper clamp has a longer leg, like the later XS650 front axle clamp. The longer leg goes to the forward position, and is tightened first.
The Honda's longer leg would be identified with a dimple.
This same marking would be used on axle clamps.
That Honda clamp design has a purpose.
During acceleration, the rearward torque on the handlebars from the clinging rider induces a tighter clamping force, resisting rotation.
In case of a frontal impact, rider and/or especially his legs smacking the bars forward, causes the clamping force to lessen, allowing the handlebar to rotate forward, hopefully saving the rider and bike some serious pain. A safety feature.
Think of it like a hook spanner.
The XS650 handlebar clamps aren't like this, and simply mount with equal clamp gaps front and rear...