removing flywheel

moby /

Mar 03, 2001 09:47PM

I'm having some trouble removing the flywheel on my motobecane mobylette. In the manual it doesn't mention using a flywheel puller, since the flywheel is retained by a threaded cap with a square hole in the centre. It says to lock the flywheel by placing a bar through the connecting rod and support the bar with wood blocks, then use the stock from a 3/8 drive socket in the square hole of the cap. The cap is a left hand thread which i think means turning it clockwise to loosen it. Am I doing something wrong or is the cap just on really tight ? Can I use wd40 somehow to loosen it ? Any suggestions are appreciated.

Re: removing flywheel

Fred /

Mar 03, 2001 11:43PM

It sounds like you are doing everything right.

I have not seen a left hand thread flywheel nut... But I have not worked on many Euro peds.

But if the manual says it is a left hand thread...then keep doing what you are doing... (clockwise)

If it doesn't want to budge... You could take it to a garage and have them use an air impact wrench.

Or you could try a hand impact with an adaptor (if needed).

Liquid Wrench is a good penetrant.

WD40 is not as good IMO... but its better than nothing.

Re: removing flywheel

The Moped WareHouse of New Jer /

Mar 04, 2001 02:12AM

You are doing it correctly. The nut is reverse thread and the square is slightly larger than a 3/8" ratchet, but the ratchet will work in a pinch. The part that you will need a puller for is the point cam which is a conical press fit onto the crank shaft. Depending on what your doing to the engine you may or may not have to even remove this though. Make sure that you inspect the flywheel and cam lineup dimples and that it is seated correctly when you reinstall the flywheel. . The flywheel nut is of a fairly soft alloy so try to avoid using the air impact gun on it. We do have new nuts in stock if you neeed one. Also a good way of removing items such as this if the engines top end is still intact is to feed a length of rope throug the spark plug hole and then rotate the piston to the top. The rope will prevent the engine from making a complete revolution.

Chris

The MopedWareHouse

www.mopedwarehouse.com

Fred

gimmejimmie /

Mar 04, 2001 10:54AM

Hi Fred,

I thought you might have went to Bike Week for the Daytona 200, that's a helluva race to see live.

gimmejimmie

Re: removing flywheel

moby /

Mar 04, 2001 01:07PM

Thanks for the help, i'll use some liquid wrench or wd40 and keep trying.

Re: removing flywheel

moby /

Mar 04, 2001 03:18PM

Well, this thing won't budge. I guess I'll try the air impact wrench.

Re: removing flywheel

mike /

Mar 04, 2001 04:52PM

i got an interesting but semi dangerous answer. try to take the wrench and put it on the fly wheel and have a friend try to start the bike while u hold the wrench still. try that and see if it works.

Re: removing flywheel

Ron Brown /

Mar 04, 2001 05:27PM

Moby,

Strike the last sugestion. The thread is left handed to prevent that from happening!

Use the impact, it worked on both of my motobecanes.

Ron

Re: removing flywheel

moby /

Mar 04, 2001 06:15PM

Thanks Ron, I'll use the air wrench. Now I think these come in 3/8" and 1/2" sizes, I'm assuming I need the 3/8" one. Thanks everyone.

Re: removing flywheel

Reeperette /

Mar 05, 2001 11:08AM

You could try what I did on the oil pan plug of a car once.

Those dillwads at the oil change shop slammed it on with an impact so that the owner would NEVER get it off, and I suspect that's rather deliberate of them.

Anyhows, I put a very strong, well-serving ratchet on it, and then got a long piece of tubing and slotted the end of the tubing over the ratchet handle, one holding it on, two more pushing the bar of tubing, we did get it off, and someone got a lecture about going to those damn quickie oil-change places the whole damn time.

But be careful, cause I suspect would could probably shear the bolt that way.

-Ree

I Wish!

Fred /

Mar 06, 2001 12:25AM

Yeah... I'm sure it is fantastic.

I would enjoy the whole week...all the races.

In fact 3 of my friends are going (or have already left).

Re: I Wish!

Ron Brown /

Mar 06, 2001 11:03AM

Fred

I am planning on riding down to spend next weekend there if the snow clears in time.

If I make it, I'll think of you.

Ron

Re: removing flywheel

frito bendito /

Mar 15, 2001 07:21PM

your gonna have to get a puller to get ur flywheel off because i had the same problem with my flywheel on my 80cc dirtbike.so i just took it to my dads work and i got him to pull it off.

MOPED ARMY

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