My K75 project. My first BMW ever

[k75_cafe]

My name is Alex and I bought a K75 1990 last year. It's been sitting for 4 years with the previous owner and i started working on it in march. I/m looking to make it in a cafe racer. I'll put some photos in a few minutes. Today when i put the battery back on it I found that the bike wants to start on it's own without the key even.The electromotor keeps turning but i don't hear the fuel pump working . So although it's wants to start it doesn't. What to look for ? what might be the problem ?

[TimTyler]

... when i put the battery back on it I found that the bike wants to start on it's own without the key even.The electromotor keeps turning...

Probably a stuck starter relay caused by a weak battery.

[k75_cafe]

Fully charging the battery will solve the issue ? Or do I need to take further action ? take it down ... clean it ... replace it ... look for new one ?

[TimTyler]

If it's a stuck starter relay you can try tapping/whacking the relay with a tool and maybe it will un-stick. Once they stick, they are more prone to stick in the future, even with a good battery.

You can replace the relay (they're not cheap) and be careful to use a good battery with good electrical connections.

I have disassembled relays and sanded the previously stuck connections so they'll be less likely to stick. One is in my bike now.

[k75_cafe]

Sorted out the relay now strugling with the running light staying on during bike being off and turnin off when bike is on.
Also I am lookin for a pair of new radial tyres . Open to sugestions

[telecaster-custom]

Just starting my own K75 project.  Couple questions, if you don't mind.

What headlight assembly did you use?

What strap-ons/grips?

What plans do you have for instruments/gauges?