New to me, 63 Mobyelette AV88

I recently acquired a 63 Moby AV88 and I am slowly working my way through its issues. You will have to forgive me, this is my first moped, be kind. It has around 650 miles on it and I don't think it has been molested, because it came with the original tool kit and tire pump. I hope to have it up and running for the Harvest Classic in Luckenbach next month.

I seem to be having an issue with the clutch, and I can't get the engine to spin. No matter how fast I crank I can't get the centrifugal shoes to expand so that the engine will turn over. I am thinking the springs are to strong. When I use a screwdriver to expand the shoes it is like I'm dealing with brake springs (very strong).

Any ideas or advise?

Re: New to me, 63 Mobyelette AV88

This is an update on what I thought was my spring issue. I have a parts bike with the clutch intact and so I pulled it apart and the springs are the same, sigh. Thought I had it figured out. I did notice that the shoes have 2 sets of holes and I'm thinking that if I move the springs to the inner holes that might give me a bit more room for the shoes to expand.

Thoughts?

Re: New to me, 63 Mobyelette AV88

Does this model have the switch on the driven pulley to engage/disengage the drivelive from pedal only mode? Have you tried to start the engine with a drill vs. the pedals?

Re: New to me, 63 Mobyelette AV88

Yes it has the disconnect for the engine, and it is hooked up.

No I haven't tried to start it with a drill. Good idea though. I will give it a go and see what happens. Report to follow.

Thanks

John

Re: New to me, 63 Mobyelette AV88

Often there is corrosion on the pivot for the starter clutch arms. The springs are not supposed to be wicked hard on those arms either. DIsconnect the springs and see if the arms will just flop around, if not then get some penetrating oil at the pivots. Use the oil sparingly because oil in the clutch will cause troubles. Work the arms in and out until they are super loose, then use brake cleaner and chase out any extra lube. Check them again, they should be loose.

Do not be tempted to use any substantial heat to assist you loosening the arms, they are pot metal and will from a solid to a puddle with very little heat.

Re: New to me, 63 Mobyelette AV88

Indeed those holes are so you can have a earlier starter hook up (two holes closest to each other), medium rpm hookup (one in one out) or late hook up (outside holes)

But at more or less goodly pedalling speed they should be contacting the bell and turning the motor.

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Re: New to me, 63 Mobyelette AV88

Do you have the parts catalogue for the AV88 yet?

What year is your new-2-you Moby?

IPC page for the clutch that you likely have on your Moby

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Re: New to me, 63 Mobyelette AV88

I have thought about corrosion on the arms. As far as I know they haven't been apart for 56 years. I can get them to move with the use of a screwdriver. I will pick up some penetrating oil and see where that gets me.

How hard is it to remove the springs and reattach them with everything still in place?

Thanks

John

Re: New to me, 63 Mobyelette AV88

I can see from the picture you sent that the arms don't have a bushing just pot metal.

I have been avoiding taking the clutch apart again. The snap rings and shims weren't a lot of fun to deal with, especially the outer snap ring what a pain.

But, if I'm to get this sorted out I will have to do it.

Thanks for your advise and the picture.

John

Re: New to me, 63 Mobyelette AV88

My new to me Mobylette is a 63. No I don't have the parts book but I have found a shop book on line that I printed out and put into a binder.

I will print out the parts break down of the clutch you sent me and keep it as a reference. You can never have to much information.

Thanks again

John

Re: New to me, 63 Mobyelette AV88

Click flat view at the top of the screen, makes things easier.

Re: New to me, 63 Mobyelette AV88

I will email you a copy of the parts book, it is in French language but the illustrations are handy to see how things are assembled.

> John Ebert Wrote:

> -------------------------------------------------------

> My new to me Mobylette is a 63. No I don't have the parts book but I

> have found a shop book on line that I printed out and put into a binder.

>

> I will print out the parts break down of the clutch you sent me and keep

> it as a reference. You can never have to much information.

>

> Thanks again

>

> John

Re: New to me, 63 Mobyelette AV88

I have a 64' 88, just getting into it. I ordered the same parts book online (hard copy, in French). I'm hoping for a wiring diagram as the PO did a LOT if "engineering" in that area.

Re: New to me, 63 Mobyelette AV88

I picked up a parts bike, a 59, at the same time I got this one. In pretty sad shape but if it saves me even a little bit of money it is worth it. This one hasn't been molested just neglected and once I get the starting problem sorted out I will be well on my way.

If you don't mine, where are you at? I'm in Texas.

Good luck and maybe we can help each other out information wise.

John

Re: New to me, 63 Mobyelette AV88

Downhill Harvey (OFMC) /

> John Ebert Wrote:

>

> Good luck and maybe we can help each other out information wise.

Some good info,

http://www.myronsmopeds.com/2012/08/motobecane-parts/#more-5300

http://www.myronsmopeds.com/category/parts/wards-riverside-parts/

Please post some pics of the bike, and parts bike

Re: New to me, 63 Mobyelette AV88

Well I'm still trying to figure the little beast out. I have removed the clutch twice. Yesterday I removed the shoes to see if there was a issue with the pivot point such as corrosion, there was a little bit but a touch of 600 grit sandpaper and a coating on never seize and I thought I was good. Then I noticed that when the shoes were in place and everything was tightened down there was a drag on the shoes. I had put things back together the same way it came apart, someone had been in there before and the washers and spring washers were on one side, sorted that out and It seemed to work easier. Put is all the way back together and it still doesn't turn the motor.

Any ideas of what I need to do?

John in Texas

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Re: New to me, 63 Mobyelette AV88

I just posted pictures of my 63 Mobylette. here are pictures of the parts bike that was asked for.

Cheers

John in Texas

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Re: New to me, 63 Mobyelette AV88

Have you tried comparing the clutch with the parts bike , if that works OK ?

Re: New to me, 63 Mobyelette AV88

Rick Bergsma /

Nice looking classics ,

Just wondering , are you using the decompressor when you are trying to turn the engine over?

Re: New to me, 63 Mobyelette AV88

Downhill Harvey (OFMC) /

> John Ebert Wrote:

> here are pictures of the

> parts bike that was asked for

Oh man, that parts bike has just about everything I need. My roller, with an engine in a box, needs ,

one tank badge, headlight ring, left side cover, headlight switch, and brake light switch,

Is that a Motobecane, or a Wards Riverside? Virtually identical, except for the tank badge. Mine was also missing the piston, cylinder, intake, and carb, and the cylinder head/motor mount spacers, but I have all that now. I have the leg shields, but not the mounting hardware. I see yours has the left , and head-tube mounts still on the bike.

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......................but I give it all up, for a dent free rear fender.

Re: New to me, 63 Mobyelette AV88

Downhill Harvey (OFMC) /

I've been searching for months for a left side cover just like this,

Motobecane1959.jpg

................early av88 side-covers are different.

Re: New to me, 63 Mobyelette AV88

Hmm. I'd say either you diddnt rough up the clutch pads enough with sandpaper. Or the previous owner may have gotten oil in there.

My buddy had a similar problem with his years back. We just pulled the variator/clutch assy Off of a parts 50v and threw it on his. Worked like a charm...I'm not sure your bike is the same exact model tho..

Diddnt last very long as he ended up throwing one of those nos crate engines on it.

Re: New to me, 63 Mobyelette AV88

I have the plug out of it. Originally I was going to check the spark when I realized the motor wasn't turning over. That's when this little adventure began.

John in Texas

Re: New to me, 63 Mobyelette AV88

My parts bike is a Wards Riverside. Like yours it has a tag on the rear fender.

I soaked the shoes in brake clean with no improvement.

Been thinking about the woodruff key in the crank, it doesn't protrude much above the crank and maybe it isn't locking the drum securely? I did take the key out of the parts bike and it is exactly the same.

It was suggested I use a drill to start the motor but I don't think that would work. If I put a 14mm socket on nut the left end of the crank it would just back it off. Same think with the right side with the left hand nut.

I have installed new tires and plan to clean the carb tomorrow, just to give myself some sort of accomplishment on the old girl.

Thanks all for your thoughts and input.

John in Texas

Re: New to me, 63 Mobyelette AV88

Before I took mine apart I could get it to crank turning the flywheel by hand.

Re: New to me, 63 Mobyelette AV88

I can turn it over by hand, no problem.

John in Texas

Re: New to me, 63 Mobyelette AV88

Check that the arms also have sufficient pads to make a good firm contact to the bell. Earlier arms had lots of pad when new, so when worn the still look serviceable but the pads do not actually contact the bell. Over time I discovered that just a little file work (seriously soft metal so files eat with only a few passes) where the arms contact the support for the upper brace and you can get 100% wear from the friction pads.

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Re: New to me, 63 Mobyelette AV88

The bike only has around 650 miles on it (by the speedometer) and the pads do look good but I'm more than willing to take a file to the shoes to get more contact from them. It looks like it could be the fix I'm looking for.

Thank you for your insight, I would never have thought of it. A status report will follow.

John in Texas

Re: New to me, 63 Mobyelette AV88

Indeed John it is a easy mod to perform and dont have to take off more than the 1/2 the width of the web like in the picture. Even if the bike does not need it now it is goodly for the future .

ALSO as mentioned by someone else, check that your decompressor is working because a New2You bikes engine that has been sitting a bit will likely be a bit more resistant to pedaling over. Might just get away with drill starting it two or 4 times and then she will pedal start each and every time :)

> John Ebert Wrote:

> -------------------------------------------------------

> The bike only has around 650 miles on it (by the speedometer) and the

> pads do look good but I'm more than willing to take a file to the shoes

> to get more contact from them. It looks like it could be the fix I'm

> looking for.

>

> Thank you for your insight, I would never have thought of it. A status

> report will follow.

>

> John in Texas

Re: New to me, 63 Mobyelette AV88

Well the plug has been out of it so needing to use the decompressor isn't a factor at this time. I removed the clutch again. What a pain! the inner circlip is difficult to get out without the proper long leg snap ring plyers for outside snap rings.

With the clutch out of the way I installed the clutch drum back on the crankshaft and it would turn over. Cleaned the shoes, sanded them, and cleaned the drum again with brake clean. Reinstalled the clutch and drum and I am back to square one. Thinking that the drum isn't seated on the taper.

The clearance between the shoes and the drum are minimal. Going to get a small can of acetone and spray it on the shoes.

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