fontana wrote:slparry wrote:5 x K100RS's
I'm interested in getting one of those.
I did have a K1100RS and an LT, which were great, but the 4V K100 was the original brick, and something of a modern classic, which is why I'd like to own one
Any issues ?
The fact you had 5 of them qualifies you to be something of an expert

All of mine where the 8 valve engine, IMHO that engine was the most reliable lump ever to grace a motorcycle, I had mine from 1985 to 2007 and in all that time I had one problem, a failed throttle position sensor, still got me home but wouldn't exceed 60 mph.
22 years on them with nothing more than standard owner (me) servicing (once out of warranty on one of them) and consumables like tyres.
90 hp and a torquey engine made them as useful on the road as needed. The early ones had soft suspension, easily cured by fitting Progressive Suspension fork springs and up a grade on the oil. Best tyres on them were Avon Azaro ST Radials
I would happily own a KRS again .... they're a bike I just feel "right" with
It's advisable to drain and dry the fuel tank annually to stop water corroding the alloy inside, first thing you know is the paint starts to bubble at the low points of the tank.
Post 1987 ones have pegged piston rings (a la two stroke style) that resists them smoking when being restarted after being on the side stand.
I always used 15w50 Mobil 1 car oil in mine and 75w90 Mobil 1 gear oil in the box and the bevel drive, never had any issues with engine, box or drive.
Used to bi annually take the bevels off and regrease the splines with Optimol
Oh and don't try and start them with a low battery, the starter relay can fuse weld itself together.
Shims on the 8v are easy to change as they're above the buckets (Z900/Z1000 Kawasaki shims are the same size as are some Yamaha ones ... about the diameter of a 10p piece). There's a special tool to hold the bucket down while you oik the shim out.
Injector balance is easily set with Morgan Carbtune
http://www.carbtune.co.uk/
don't touch the screws with locknuts on the injector rails, there's dire warnings of having to replace the entire bank if you do as they're factory set for flow.
A previous neighbour, who was a mechanical rock ape to be honest as his major tool was a molegrips and a hammer, had one that looked like a Mad Max refugee and had 237,000 miles on it. It only died when a car wrote it off