I am new here to motobrick.com I just posted in the front porch some pics of my new (to me) bike. I have a 1990 K75S in good overall condition. It does have a few minor issues that I wanted to figure out the best way to address. I read some posts on here but have not found my answer yet.
Sidestand: I have noticed that the side stand does not support the bike well. It will hold the weight but it leans way to far. If a finch farted on it, it would fall over. I don't mind too much I have been using the center stand. The side stand goes down well and folds correctly but I am not sure how to fix this. Is a replacement necessary?
Speedometer: I have read many threads about this but none exactly like mine. First, the cluster seems to bounce around quite a bit when riding. Second, it does not work at all when you first start going. After a few minutes, it springs to life. The rev counter and the gear indicator seem fine and the speedometer works albeit way off. The high beam indicator and signal indicators are fine but the battery light comes on. The bike seems to charge and there doesn't seem to be a problem but the light is still there at varying intensities. Unknown if low fuel light works and the trip odometer knob is missing. Is it better to just replace this or try and fix it? Are there good aftermarket options? Are they all this screwy? I have a GPS for speed now.
Brakes: The rear brake squeaks sometimes I am assuming it needs pads. They don't look too bad but I haven't taken them apart yet. Where is the best place to buy brake pads and other parts for these bikes? The previous owner used BMW parts for everything down to the oil filter. He didn't mention where he got them.
Fuel: What kind of fuel is best for this bike? I have read regular fuel is fine and I plan on using it. It runs great the way it is but it came with a full tank.
Oil: Is any full synthetic good or is there a specific one I should use?
Splines: Although there are no shifting problems or weird noises, I do not know when these were lubed last. Is it imperative to take it apart now? If so what lube.
Thanks! I know some of these answers are on here but some of the posts are old and some fresh opinions could help.