SOHC.co.uk Forums > CB350/400

1976 cb400F generator rotor puller size

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DayvW:
Hi,
Can anyone tell me the size I need to remove the generator?
Thanks.

Orcade-Ian:
Hi,
I just went to check as I made one on the lathe for my 350 and 400 and it was M18x1.5mm pitch - that is not the 'standard pitch for 18mm diameter (that's 2.5mm) but is an alternative pitch, so a bolt might be obtainable.
If you have a mate with a metric screwcutting lathe he might be kind enough to make one for you.  I also made a plug to go in the end of the crank, so that the extractor couldn't damage the internal thread.  I have a vague recollection that a 750 or 550 rear wheel spindle was the correct thread and could be used to extract the rotor - someone might confirm this but I don't have one to check.
Ian

Bitsa (Ralph Wright - RIP):
Hi,
With some of the smaller Hondas I found the rear wheel spindle will do it.The 750 does not.
Cheers
Bitsa

fisjon:
Yes, my CB650Z rear spindle fitted straight into the rotor and I used an old hub to slide along the shaft to whip it out. I remember this well as when the old hub got to the end of the shaft my finger was still there! F**k!

DayvW:
Thanks for the replies (and ouch!).  I'll try a rear wheel spindle (and mind my finger!).  I was going to get the Laser Flywheel puller if one the fittings was correct (which it sounds like it is if Machine-Mart is correct) - but maybe I don't need to.  Excellent! 
First things first - the bolt in there is on so unbelievably tight I can't shift it.  Any hints and tips for removal?  Is it a normal thread (not reversed  I assume)?  Should it be that tight?  I've tried 'locking' the crank by putting a screw driver into the rotor and bracing against a cover bolt - but I'm worried that I'll damage it if I force it too much.  Any suggestions (as ever) gratefully received.
It occurs to me that as I plan to split the crankcase (as I am perhaps foolishly - going the whole hog on this engine) - do I actually need to remove the rotor to do this? I am suddenly thinking perhaps not - that once the case is open I can lift out the crank with the con rods and rotor still attached - so as a unit - but is that right?
Thanks again for any pointers and suggestions.

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