Hama from Japan owns this all original and very clean looking MC28 NSR250R SE model. He really loves NSR bikes a lot!! Mr. Hama also took the time to make a copy of the MC28 wiring diagram in Japanese for us but with colored lines so it's easy to understand. Click on the below picture for the full sized image (670 KB ). Thanks Mr. Hama!!
MC28 Japanese wiring diagram in color by Mr. Hama - 670K Click for full size image