PA50's driven pulley problem (Fred help)

Mitchell Farley /

Hey all, I finally managed to repair the old 1978 PA-50I's carb, and I've been cruising around town all week with only one speed, until I decided to get new tires to replace the ORIGINAL stock Michelins that definately show their age. Anyways, while the ped is out of commision until JC Whitney comes through, I decided to work on the variator CVT system, since I noticed it does no shifting at all since I got the ped up and running again. I removed the variator, and it works beautifully, the only thing preventing it from allowing the shift to occur is the rear driven pully. It is stuck. I cant seem to get the bastard to budge at all. My rear pulley has 3 allen bolts put through it, with tiny washers and nuts on the back, so that seemed like an obvious reason as to why it wasn't operating, since I scoped out a PA50II manual, and it shows nothing of the sort on the pulley. Well, after I removed the allen screws, the only thing I can accomplish, is to slide the inside pulley face off of the outisde pulley's. I'm really at a loss as to how this ped is supposed to shift with a rear pulley setup like this, am I going to need to replace the pulley, the whole assembly or what?! I very confident I understand how the system is supposed to operate after spending quite some time with the search function, and the 1983 PA50II manual I downloaded. Anyways, any ideas as to what I should do to attempt to fix this would be appreciated (hint hint Fred!!!!) Anyways, thanks to all you ped fanatics out there! Peace....

Re: PA50's driven pulley problem (Fred help)

Well... first.. I don't want to make an asumption.

How fast does it go?

Is the motor all stock?

Have you run it without the belt cover?.. and watched the front variator pulley halves to see if the outer one moves ?

Re: PA50's driven pulley problem (Fred help)

david f martin /

I have a PA50I that I've never looked at (brought to me by a scrap collector), but I've had some experience with the variator on my '87 Honda Elite.

Fred, please correct me if I'm wrong.

The rear pulley halves should be spring loaded so that they will separate as the front pulley closes up. You should be able to pry them apart with your fingertips. If the spring is missing or broken, someone may have put those bolts in there just so the bike will have some lower end takeoff. See if the spring is still there.

david

Re: PA50's driven pulley problem (Fred help)

Mitchell Farley /

Yes, I have watched the pulley halves, and they sit completely still. The variator is completely functional, which I found out after removing it and freeing it up and properly lubricating it, however, the rear pulley is completely frozen up, and after some research, it appears someone has added those hex bolts to hold the pulley halves together. One question, how in the world do I remove that pulley without the puller that the manual shows? I am unable to budge the sucker, so should I go ahead and buy a rear wheel/drive unit off of Ebay like a smart person, and use a known good setup? Or does someone have a usable rear wheel drive unit I could purchase from them, as I'd feel safer mailing money to a Moped Army fan than some Ebay yo-yo. Oh, and Fred, the moped goes a flat out 20MPH full throttle, (without any pulley movement, and its a PA50I !!!) which I checked against my friend who was cruising in his S10 truck behind me, so his speedometer probably isn't the most accurate thing in the world, but thats what he assured me I was traveling at. I don't have a speedometer cable, amongst other creature comforts on my moped such as a headlight. LoL but I would love to see what my top speed would be when I get the drive belt system operating correctly. Anyways, thanks in advance guys/gals.... Peace....

Re: PA50's driven pulley problem (Fred help)

I don't know much about the rear pulley and drive .. I have never had to take mine apart yet.

I just assumed you removed the center nut and it came apart

<img src="http://members.aol.com/awillbe/5.jpg">;

I don't know about any hex bolts back there ... so it appears somebody hacked yours up ... you wouldn't believe some of th things people do.

The one in that photo is on ebay right now with no bids at a $10 start bid.

I don't have an extra one.

20mph with the variator not working is pretty good... it also shows how restricted the dumb things are.

Re: PA50's driven pulley problem (Fred help)

david f martin /

"the only thing I can accomplish, is to slide the inside pulley face off of the outisde pulley's"

Did they spring back together when you released them?

david

Re: PA50's driven pulley problem (Fred help)

ItsLookingUp /

Mine was frozen also. I soaked it for a day in PB rust breaker. That freed it up. Now I can spread it apart smoothly with my fingers. Taking it apart is difficult. On the back side is a threaded "washer" with a single hole for the "special tool." It's the clamp looking tool shown in the manual. Hope that helps.

Re: PA50's driven pulley problem (Fred help)

Well, I've fixed the problem. I'm scrapping this rear wheel assembly for a new one from a PA-50II from Ebay. =) My rear wheel assembly doesn't even have the engage lever anymore, its just a post protruding from the gear box. Anyways, I'll post what happens when I get the new rear wheel assembly and hopefully cruise down the road with an operational "Hondamatic" variator system. =) Thanks for the help though guys. (Oh, and the pulley seperation I was talking about was not the pulley halves seperating, it was the inside pulley face literally coming off (detatching completely) off the outside pulley faces "shaft". Hard to explain, but its not a pulley with only one pulley face. LoL Thanks again for the help guys.

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