- Joined
- Dec 8, 2011
- Messages
- 404
I have a 1974 850 Mark IIA Commando that was manufactured in June of 1974. From my research I have learned that during 1974 the alternator rotors had been improved with the magnets welded to the center. Apparently the improved part numbers were either 54202275 or 54201143. These part numbers superseded the earlier rotor part number 54212006. The rotor on my motorcycle however is different than any of these. The rotor's faces on mine have been machined flat allowing Belleville washers to be placed on both side of the rotor. Instead of a part number stamped on the rotor, mine has a part number ink stamped on the backside which is 54201144 with a manufacturing date I recall of 4/74. Here is a picture of my rotor showing the one Belleville washer:
I actually like the way this rotor is mounted. I prefer it over the star washer that is commonly seen. What I am wondering is if this rotor has the new, improved welded magnets or if it is just a modified earlier rotor.
My thinking is that when the time comes, should I go ahead and have this rotor re-magnetized or replace it with a rotor that has the magnets welded?
I have checked my part number and received absolutely zero hits on a search. It could be that I read the number incorrectly as it is pretty well faded.
Thanks,
Pete
I actually like the way this rotor is mounted. I prefer it over the star washer that is commonly seen. What I am wondering is if this rotor has the new, improved welded magnets or if it is just a modified earlier rotor.
My thinking is that when the time comes, should I go ahead and have this rotor re-magnetized or replace it with a rotor that has the magnets welded?
I have checked my part number and received absolutely zero hits on a search. It could be that I read the number incorrectly as it is pretty well faded.
Thanks,
Pete