points arent opening...

Casey B /
casey
Feb 21, 2002 09:53PM

i was down trying to work on the motobecane 50L (finally had time)... it doesnt spark. so i took the flywheel cover off so i could see the points as i was cranking (and was going to clean and set them).. then i noticed that they arent opening and closing as they should... when i pedal, the enging will chug intermittenly, but only seems to "catch" sometimes.. when it does, the points will jerk closed or open, but they dont move smoothly or with any sort of fluidity (or pattern)..

...could this be a clutch issue?

thanks!

casey

Reply

sounds like a loose flywheel nut....

Garret Rassulo /
garret_r
Feb 21, 2002 10:14PM

motobecane flywheels arent "keyed" meaning they dont have a lil bump or pin that a groove in the magneto itself slips onto. the bolt that holds it to the crankshaft may be loose or stripped, allowing the crankshaft to spin freely and then catch when it spins fast enough (kinda like your bikes clutch) tighten the bolt and also make sure u've got your timing correct (take off the cylinder head and move the piston to TDC, then set the points to their gap and tighten the flywheel) while u have the head off, you might wanna scrape the carbon outta the combustion chamber as well, 2strokes need this done a lot. the most common motobecane "it wont run" problem ive seen is off ignition timing.

p.s. i hope im thinking of motobecane and not peugeot or velosolex, i get my french brands mixed up.

point gap .35-.40mm (.014-.018in)

hope it helps

Garret

Reply

Re: sounds like a loose flywheel nut....

Casey B /
casey OP
Feb 21, 2002 10:47PM

hey, thanks man! ill go give that a shot...

the weird thing is it was working fine (well, no aprk.. but the points were opening and closing correctly) before... and since there hasnt been any spark, i havent been riding it... its just been sitting... weird.

casey

Reply

Re: sounds like a loose flywheel nut....

Casey B /
casey OP
Feb 21, 2002 11:05PM

also.. is there any easy way to get the cylinder head off a motobecane? like, without removing the whole engine from the frame? i hate doing that...

casey

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