Welcome Bookm. I would say that changing sprockets and upgrading to an o-ring chain will probably solve your excess lash problem. The chain condition and proper tightness seems to have a noticable effect on shifting and feel with this bike. My rear brakes have almost 5000 kms on them and are only showing minimal wear. I do tend to go easy on the brakes, relying more so on engine braking. You're right about the grin factor on this bike which is strange because the bike doesn't seem to do any one thing great.I finally got a chance to run a pretty thorough test on the new ('87) today. Even laid it down once running through a sloppy muddy trail back in the bush (front wheel followed one rut, rear wheel took a different route, lol). Then back in to town for some practice on public streets.
All in all, I was very impressed. Haven't had so much fun in years! Perfect bike for back-road exploring.
But I noticed when putting along in 1st or 2nd gear, the gearbox behaved rather "abrupt" when easing on and off the gas. With the engine off and kicked down to first gear, I get a little more than one full link when picking a point on the swingarm and watching the chain as I rock the bike back and forth.
Is this normal? The odometer says 4500km's (2800miles) but I'm just a tad suspicious that a different cluster may have been installed at some point. The rear sprocket is pretty much worn out and the rear drum brake pads are about used up. Not sure how long they should last.