Seca XJ750 ROTOR (alternator) removal help!

Hello, I am trying to remove the rotor from my Seca XJ750 bike. The problem is that the engine is out of the frame and as such locking the gear is tougher.
I woudl like to know if anyone has any tips on removal. Also, is the bolt that locks the rotor reverse threaded??

Thanks in advance.

 

The old trick I use is threading a bunch of rope down a spark plug hole and bring the piston up to TDC. Another method is to have two bolts installed in the output flange and wedge a long screw driver or similar long bar between them after you place the motor in gear. I used my electric impact driver to do this and it came off without a hitch. The rotor is normally threaded, if you can find a bolt the same pitch and size as the $15USD tool, your in there. Just make sure to lube the threads well, don't want to run them dry, they WILL gall up. Good luck and let us know how it goes!

 

Thank you Robert.
Basically, I was able to lock a crowbar in between the "U" joint from from end. The trick here is to get someone to stand or sit on the engine while I attempt to loosen the rotor bolt, it is TIGHT!!
Thanks again, I will let you know when I do get it out!

Also, another trick I used was to lock the drive gear (inside drive casing) with a piece of cloth, I would simply place a heavy cloth between the mating gears and turn until they lock. The cloth does not damage the gears. I woudl be somewhat wheary of placing thread down the piston as some lint or other material may contaminate (possibly scratch) the bore.

Thanks again for your help! The most importanat piece of info for me is now knowing that the rotor is normally threaded.

 

I totally agree about not wanting to have any foreign material in the cylinder Igmab, however I use a piece of rope that I don't use for anything else, I keep it in a plastic bag when not in use. What little fuzz it might leave behind is burned right out on the first stroke. A small piece of debris caught in the rope could do damage, so just buy a new piece and use it in the manner described. Cloth in the gears works great save one issue. You must make sure you remove all traces of fuzz from the gears afterward. This lint can make life a little harder on your oiling system if it gets into it. No chance of that in the cylinder. When I removed my rotor, I had the engine out and I had the bar bolted in place with the end of the bar resting on the floor. An electric impact is just the thing for this application (I highly recommend the purchase if you are to do more wrenching on motors. Harbor Freight $40USD). I hit the rotor removal tool and it came off with no fuss. Let us know what the outcome is with the patient please.

 

Thanks Robert, and I agree about the incidental-debris being burned in teh cylinders as opposed to keeping residuals on the gears!
Thanks again!