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Moped Riders Association • View topic - Help with Motobecane Mobylette 50V

Help with Motobecane Mobylette 50V

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Help with Motobecane Mobylette 50V

Postby fishfun83 » Sun Mar 21, 2004 7:39 am

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re: Help with Motobecane Mobylette 50V

Postby ItsLookingUp » Sun Mar 21, 2004 8:22 am

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re: Help with Motobecane Mobylette 50V

Postby fishfun83 » Sun Mar 21, 2004 8:53 am

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re: Help with Motobecane Mobylette 50V

Postby fishfun83 » Sun Mar 21, 2004 9:12 am

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re: Help with Motobecane Mobylette 50V

Postby ItsLookingUp » Sun Mar 21, 2004 9:42 am

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re: Help with Motobecane Mobylette 50V

Postby ItsLookingUp » Sun Mar 21, 2004 9:51 am

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re: Help with Motobecane Mobylette 50V

Postby don-ohio » Sun Mar 21, 2004 10:05 am

`Ped `til yer RED!' ......`NO small-wheeled pothole divers need apply! LOL!' don-ohio (:^D
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re: Help with Motobecane Mobylette 50V

Postby fishfun83 » Sun Mar 21, 2004 10:08 am

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re: Help with Motobecane Mobylette 50V

Postby Mopedrepairmanuals » Sun Mar 21, 2004 11:00 am

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re: Help with Motobecane Mobylette 50V

Postby fishfun83 » Sun Mar 21, 2004 11:12 am

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re: Help with Motobecane Mobylette 50V

Postby don-ohio » Sun Mar 21, 2004 11:13 am

`Ped `til yer RED!' ......`NO small-wheeled pothole divers need apply! LOL!' don-ohio (:^D
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re: Help with Motobecane Mobylette 50V

Postby jimozs » Sat Sep 21, 2013 5:46 pm

1976 mobylette v50 ran fine till flywheel loosened while running. now I have no spark. points don't begin to open till piston is almost all the way to the bottom of cylinder instead of 2mm BTDC. I am stumped. Replaced condensor and mounted to coil. I have tail light, headlight and horn. Can't find anything on net as to my problem. Any ideas? Widest point opening set to .010-.020. New spark plug. How do I get timing reversed so points just begin to open BTDC?
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re: Help with Motobecane Mobylette 50V

Postby supercub » Wed Oct 09, 2013 6:15 pm

When the flywheel came loose, the cam rotated as it is a taper fit to the crankshaft, without a key. Use a puller to pull it off the flywheel if necessary. Finding the timing again can be tricky but start out with the cam positioned so that the points open just before top dead center and mark it's location to the crank. Set the points to nominal gap. Find TDC by using a wooden coffee stirrer pressed against the piston, turn the crank CW to top, and put a mark on the wood at the top of the head. Good eye and feel are necessary here to spot the exact location of TDC. People will say use a piston stop but with that you have the slop in the connecting rod as backlash to throw it off. Put another mark 2mm below that TDC one, and that is your reference for the timing mark BTDC, where the points should open. Hook up a multimeter to the grey wire and ground, set the meter to buzz mode. Turn the crank CW until the buzzer stops and if the timing is correct, the lower line will line up with the top of the head.
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