cannot get the flywheel on without woodruff key falling out

i am doing my first rebuild of a vespa motor. i keep trying to get the flywheel on but the woodruff key shimmies halfway out when i do,and then shears off when i try to start the bike.

have any of you used a dab of super glue to get the key to sit in place while you put the fly wheel on? or do i need to sand down the woodruff key more so it isn't pushed out when the flywheel slides on?

i swear, if it weren't for flywheels keys , mopeds would be easy... i want to go back to my hobbit now. lol

Re: cannot get the flywheel on without woodruff key falling out

Dirty30 Dillon /

Woodruffs keys are easy.

Especially on vespa because the points cam typically hold it in.

Do you have points or CDI? If it points, you need this in there, which should stop it from being pushed out.

https://www.treatland.tv/vespa-piaggio-olympia-points-cam-collar-p/vespa-points-cam-collar.htm

Re: cannot get the flywheel on without woodruff key falling out

I just got rid of the points and went to a performance crank. i wish i could still use the points cam. :-(

put in some Kinetic coils and i am planning on using the Parma box. :-/

Re: cannot get the flywheel on without woodruff key falling out

Dirty30 Dillon /

> steven kline Wrote:

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

> I just got rid of the points and went to a performance crank. i wish i

> could still use the points cam. :-(

>

> put in some Kinetic coils and i am planning on using the Parma box. :-/

What flywheel are you using? If it's the Kinetic CDI one, you need to have the points cam or the Kinetic non-cam in there, otherwise the flywheel is just going to keep shearing those keys

Re: cannot get the flywheel on without woodruff key falling out

the kinetic CDI... but i do not have the Kinetic cam... :-( the shaft is too large in diameter to make the points cam fit. is the kinetic cam larger?

Re: cannot get the flywheel on without woodruff key falling out

Dirty30 Dillon /

Your crank is too large for the ID of the cam? I have never heard of that happening...

What crank are you using, what cases?

Re: cannot get the flywheel on without woodruff key falling out

it has the Anticipatto crankshaft. :-/

Re: cannot get the flywheel on without woodruff key falling out

Dirty30 Dillon /

None of the Vespa cranks for standard 3-stud motors should have a different OD.

Re: cannot get the flywheel on without woodruff key falling out

Yes. Super glue it on. I do it all the time.

Re: cannot get the flywheel on without woodruff key falling out

That is interesting. Do you have any pics of the misalignment? Which Kenitic flywheel? Did you try any lapping compound on the tapers?

Re: cannot get the flywheel on without woodruff key falling out

Dirty30 Dillon /

Super gluing your woodruff is bad crime.

Get the part you need. There is very little reason your points cam shouldn't fit.

Re: cannot get the flywheel on without woodruff key falling out

If it's the right one, and nothing's all bent and out of alignment, a little dab of super glue works to keep it in place while you install it. It's not like you're welding it on.

A dab of grease usually works, too.

Re: cannot get the flywheel on without woodruff key falling out

sweet!!! ima try the glue trick next. now i just need a flywheel key. ugh... waiting for parts sucks!

Re: cannot get the flywheel on without woodruff key falling out

Dirty30 Dillon /

If your flywheel looks like this:

Capture.JPG

No amount of superglue is going to hold it. You need to have the cam/spacer portion, OR just free-hand time after lapping the flywheel.

Re: cannot get the flywheel on without woodruff key falling out

15565988496139043672397179406594.jpg
15565988166414794067704865644930.jpg

Steve this is the kinetic flywheel that I got to work on my grande with an anticipato crank and kinetic coils. I posted all this in my usually too lengthy posts on trying to get that engine to work. I too am using the Parma coil. Mallosi 64 cc kit.

This is the build where the kinetic coils as mounted on a Vespa case didn't exactly fit because the coils touched the flywheel. So I sanded the coils to reduce the size. I didn't slot the holes because it appears the metal sandwich is secured by a rivet type of deal that the mounting screws go to the case. Others said I obviously had no idea of how to do it right (Alex) , and hell if I don't disagree but nevertheless it was the only way I could figure it out plus then is the question of actually timing it correctly without a blessed keyway seeing that the timing was off in either the Vespa case vs the kinetic case ( I suspect the mounts for the coils are slightly different ) or somehow the woodruff key is cut into a different point of the crankshaft of a true kinetic cdi crank.

So yeah I imagine u have 12v floated led fever as well as cdi madness ( I have such afflictions ) but stop in the name of love before you break your heart....seriously consider the virtues of Vespa points and 6v ac before you disappear down the rabbit hole. Rediculously easy to get riding.

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