- BMW Classic
- German reference site
- Isatis, K1 rebuild (in french)
- French K1 site (looks sleeping site)
- Site de trucs et astuces K100 (usefull for K1)
- German Ultima site
- Parts list
- ECU Repair (site commercial )
- Repair book
- Forum technique K100 ( usefull for K1 )
- Micapeak , référencement des K1
