Those who installed Rick's R/R cmbo unit 10-100 (
https://ricksmotorsportelectrics.com/OEM-Style-Honda-Rectifier-Regulator-10_100) on CB550K, can you share where did you place it?
if you have some photo, even better
Ideally I'd like to put in instead of OEM regulator or rectifier unit, but without need to modify in any mean the bike itself (no extra hole, nor modification of metallic "electric plate".
Why I want to replace stock OEM regulator - it is charging low in RPMs above 5500 (I tested two, result the same, after carefull cleaning, adjustment), electronic unit I tested (Electrex, UK) works good, stable, but too big to fit.