The International CBX Owners Association

Took the CBX out this morning. An hour later stuck on the roadside with a blown main fuse. disconnected the Red/White, Green, Black connector (Red/White and Green go to the rectifier, Black goes to ignition) and got going again with spare main fuse.



At home I checked the alternator/Stator resistance: .5ohm vs manual spec of .4ohm and White to Black 35 ohm (no specs in manual);



All Yellows to Green and to Red/White at the rectifier 4 to 5 meg ohm in both directions (way out of spec -manual says 5-40ohm forward and 2 meg reverse);



Red/white to Green at rectifier .3ohm - almost a dead short; ohm's law says that draws 40 amps through a 20 amp fuse - no wonder!



Everything I read on rectifier/voltage regulator/alternator problems result in a benign failure. Mine is catastrophic.



I am charging up the battery before I can check the voltage regulator.



Any ideas??



Thanks in advance,



Ray Forsyth

What I did not ask in my previous post, but which is surely the most important part: why has it gone wrong?



This is a '79 CBX and the rectifier is the original (judging from the condition of the component), so why now?



Ray Forsyth.

Have you looked at the alternator clutch plates to see if they are scored? My 82 had a similar problem and after putting a new regulator the bike still was not charging, now after digging deeper, the plates had formed a groove and were not doing the job of keeping a charge?