'79 GS750 rotor removal questions

[robertbarr]

OK, here's a case where using the search function actually leaves me more confused than before.

A friend has a 1979 750 with the typical charging problem. He diagnosed a bum stator & purchased a replacement from Electrosport. Installed it. No output (or not much). He contacts Electrosport, who tell him that he needs a different rotor. He needs a rotor from a GS850, and the original 750 rotor won't work with that stator.

OK, that's new to me, but it's been a while. He found a used GS850 rotor and is ready to install it.

The question is: How to get the existing rotor off? He's having problems. He got the bolt out, and has tried heat & hammering (ouch!) without success. I've read about pullers, including this item:

http://www.z1enterprises.com/detail.aspx?ID=2176

I just can't picture how this simple threaded item is going to apply outward force on that rotor, which is no doubt held onto its tapered crank end by some type of locker / locktite. The more threads I read about rotor removal, the more confusing it gets. What's pressing on what?? Do I thread this in, torque to 50 ft-lbs max and then nail the end with a hammer? All that will do is press the crank inward against its thrust surface.

I'm trying to advise the guy by phone / email. Not sure what to tell him. Any clarification of what's going on here will be appreciated!

[blowerbike]

my question would be for the company that sold him a stator for a 750 but that 750 now requires an 850 rotor...
sounds like BS to me.
maybe he should have been told up front so he would know what he was getting into??
for future purchases of charging parts i recommend rick's motorcycle electronics in (new hampshire??).
i wonder if they would send him a 750 stator that would work on his 750 or his money back...hmmmm
strange ****e.
he can take a swingarm pivot bolt or one of that thread and use it to push his (750) rotor off.
remove the center bolt and there are a bigger set of threads inside of the rotor.
be careful not to buug the crank threads up.

[TheCafeKid]

Its because Suzuki went to a 18 pole stator instead of the twelve the 750 had in it. I told you about this Terry. It wont charge properly with a rotor that only has 6 mags in it. He needs one with 9. Robert, I have a 750 stator. 12 pole. I actually need (i think) a stator for my 1000G that would be the 18 pole type. I doubt he'd be up for a straight up swap, considering mine is just as old as whatever motor i pulled it out of, but if the rotor thing becomes to complicated (which it shouldnt if you have the puller you need) let me know, maybe we can work something out.

[robertbarr]

my question would be for the company that sold him a stator for a 750 but that 750 now requires an 850 rotor...
sounds like BS to me.
.

Yeah, it does to me too. They claim that 'yeah, we should update the listing for that one...'.

Apparently the original rotor is now beyond re-use, and must be removed whether or not we find a stator that would work with an actual 750 rotor.

[blowerbike]

since we are on the left side of a 750 kicker engine....
i have a box of parts here/one set returned and one set to match up..
you know what im talking about josh?
i still believe its BS that a company sold this guy a part without telling him up front he needed to also buy a rotor...

[blowerbike]

Yeah, it does to me too. They claim that 'yeah, we should update the listing for that one...'.

Apparently the original rotor is now beyond re-use, and must be removed whether or not we find a stator that would work with an actual 750 rotor.

sounds like your guy used a jaw puller on his rotor...not good.
if he gets the correct threaded bolt and runs it in with an impact and lets it rap a few times...maybe add some heat ect...
this little rotor should pop right off.

[Suzuki_Don]

Suzuki used a threaded bolt that screwed into the internal thread on the rotor and this was attached to a slide hammer and with much effort this item would break the tapered seal on the end of the crank. I made one such tool for a one off use and it worked OK. Some say this puts too much sideways stress on the crank, but this was the way that suzuki did it. The tool illustration is in the back of their parts book.

[TheCafeKid]

since we are on the left side of a 750 kicker engine....
i have a box of parts here/one set returned and one set to match up..
you know what im talking about josh?
i still believe its BS that a company sold this guy a part without telling him up front he needed to also buy a rotor...

Right right, let me dig it out tomorrow......If this one i have out isnt complete (i cant remember) i may need to borrow a puller from you terry..

[blowerbike]

starter clutch housing/shim plate/large gear/bearing...
i dont need the bolts/springs/plungers/rollers.
i sent the guy 2 of all those above mentioned parts.
everything in good condition would be great.
a puller AKA bolt..i should have plenty.
chop chop hardly sportless chopper dude.

[TheCafeKid]

Hardly chopper blah blah blah....Its WAYYYYYY down on my list of things to do. If i do anything to it at all... It may be a job for Cole...after all it is HIS uncles. I will diggy dig, see what happens..