ok so i am currently in a stupper with my b6200 . I did a bench test with the starter and solenoid and I hooked up with battery cables the positive lead that is on top of solenoid grounded the negative to the outside of the starter. I then touched the connecter that goes to ignition to the positive with a gator clip and after a couple sparky moments could see and hear the solenoid engage and spin the gear that is engaged to fly wheel. I then bolted up starter and solenoid then hooked up battery to the electrical system and start to test from the battery to the starter with a test light .The top connecter has power but after that dead all the way to ignition switch. So the next thing to check would be the fusible link that is starting to show its age by falling apart, plastic is crumbling around metal connecters.Then the next thing is the safety switch for the clutch and up the line to the ignition switch. I checked the two fuses and they are good no electricity at that point.
I just orderd an alternator for a BX24, and the little spacer that goes on the pivoting mount. Installs right onto D662/D722 in the G series. The hard part is the wiring and it's not hard at all. U have to bypass the original regulator which isn't a big deal if you know anything about wiring.