PJ-
Sweet looking bike!
I have a 78 750K, virtually the same bike. I did the exact thing you did, plus I installed shoks that were substantially longer than stock. Sliding the tubes up is a trick road racers do all the time to put more weight on the front, making the front feel more planted, but more responsive, too. If you could keep sliding them up (if your handlebars weren't in the way) you eventually reach a point where the steering would get too twitchy (not to mention the front tire would eventually contact the headers or some other part of the bike when you braked and compressed the font suspension).
Somewhere in betwen is where you like it. Within reason, it's perfectly ok to make these adjustments. If you still want more front end bias, longer shocks will do the same thing. If you want to try a little higher on the back, you can always adjust the preload n the rear shocks to make the rear sit higher.
People often make the mistake of thinking more spring preload makes the bike stiffer on that end. Not true. As long as the spring compresses any amount more when you get on the bike, it is still settling to the same amount of compression as always. You're only making the ride height higher or lower when you adjust preload. It's a hard concept to grasp sometimes, but it's true.
Sherm
