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Generator Rotor

1075 Views 6 Replies 4 Participants Last post by  Alfalfa
Hi guys been a while since my last fumbling experience working on my bike but I got a question for yall. So when I try to rotate the generator rotor to find top dead center on what I believe to be the compression stroke (aligning the LT with the index mark) Its like the rotor begins to get a mind of its own. It becomes very difficult to turn and then when I get to just before the LT mark its as if the energy I used to turn the rotor gets released and it spins another 45 degrees all on it's own which causes me to overshoot the mark. After this i can rotate the rotor freely for another full turn but when I try to allign the timimng marks again after a full turn same story. Surely this is not normal... whats going on??

Sorry, bike details:
1975 CB500T
1 - 1 of 7 Posts
jayel said:
didn't someone mention using a tapered wooden shim to hold the rotor against the case?

Yes, that was mentioned.

I just use a very cheap 14mm wrench - a flat one, with no offset.
By putting a longish 6mm bolt/screw into one of the alternator cover holes, I can "trap" the cheap wrench in position and hold the alternator in place really well.
A cheap wrench has more play than a Snap-On or other good wrench.
Noramlly one of the three holes provides the right spot.
1 - 1 of 7 Posts
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