Won't start, intermittent spark now none

BRYAN WOJTCZAK /

Cleaned gas tank, cleaned carb, fresh fuel & filter & won't start. Do I start off by replacing both rear taillight bulbs? Any suggestions I'd appreciate

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Re: Won't start, intermittent spark now none

Check the bulbs, but possibly bad spark plug or condenser.

Re: Won't start, intermittent spark now none

BRYAN WOJTCZAK /

Thanks Don, brand new plug so I'll try the bulbs first

Re: Won't start, intermittent spark now none

Moped Lar (OFMC) /

Clean/file the points. Check gap.

Re: Won't start, intermittent spark now none

BRYAN WOJTCZAK /

Started to sandpaper the point last night. Going to order a flywheel puller this week & replace both rear bulbs. Was pulling intetmittent spark last week off the engine(not real strong). Not sure if the bulbs would make the difference since I did have bypass switch under headlight flipped forward but definitely worth trying! Bike hasn't run in 30-40 years been in a basement. Hoping this old kill switch isnt an issue. Appreciate all the input all new to me.

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Re: Won't start, intermittent spark now none

Moped Lar (OFMC) /

In my 20+ years of restoring mopeds, I have found that dirty/fouled points is the cause of no or intermittent spark almost every time. 40 years of sitting around in a damp basement will do it. Rarely have I ever seen a switch go bad.(edited)

Re: Won't start, intermittent spark now none

BRYAN WOJTCZAK /

Thanks Lar, it doesn't look good in there definitely probably need some cleaning. The moped didn't come with the fan or cover over the fan(things I'll try to locate if I can get it started) so I'm sure it got exposed even more so! I'll go ahead & order the 19mm x 1 puller & go from there.

Re: Won't start, intermittent spark now none

Richard Eberline /

I have a rebuilt motor, good stator, flywheel, fan set, and carb. Also have a Mule bike to tune it to a clean stock pipe. bring your bike and leave with a runner.

Re: Won't start, intermittent spark now none

if the hidden switch gives u spark then theres an issue brake circuit.

Re: Won't start, intermittent spark now none

Intermittent spark would not be a bulb issue (either your bulb is blown or it isn't, so either you have spark or you don't). Like Lar siad, It's most likely points. If not points then try condenser, and then ultimately coil. They typically go in that order from most to least likely. Coils don't really burn out unless they're rusted out. Of the 30+ mopeds I've had, only one had a coil issue (and that was because it had sat outside for 2+ years) but probably 1/4 of them needed points cleaned after I got them. When a condenser starts going bad it'll give you spark until it overheats after the first couple of miles (if you let it cool for a bit it'll start working again).

Re: Won't start, intermittent spark now none

I'm with everyone else here, file the points. Don't sand them, use a points file, they're like $3 at O'Reilly or any auto parts store. Sanding them won't do much

Re: Won't start, intermittent spark now none

BRYAN WOJTCZAK /

***update***

Rear taillight was just a pinched wire & is now working again. Flywheel puller came yesterday & here is what I'm looking at. Points look broken? What should I order for parts & from where, recommendation? Thanks everyone for your input as it's all new to me!

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Re: Won't start, intermittent spark now none

Definitely a new set of points is in order . Maybe Treatland .

And , A PO did a crap job on the soldering . I'd pull all the old solder , clean and redo it .

Might be a good idea to pull the coils clean the rust and inspect the windings for any imperfections / possible shorts .

Re: Won't start, intermittent spark now none

♣Slew Foot♣ /

Replace the fifty-year-old condenser while you're at it

Re: Won't start, intermittent spark now none

Check all grounds?(edited)

Re: Won't start, intermittent spark now none

BRYAN WOJTCZAK /

New point & condensor on order & awaiting arrival

Re: Won't start, intermittent spark now none

shoulda ordered a couple crank seals as well, anyways take a look at your wiring diagram(myrons) and put back stuff to where its suppose to be.

Re: Won't start, intermittent spark now none

BRYAN WOJTCZAK /

> pat splat Wrote:

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

> shoulda ordered a couple crank seals as well, anyways take a look at

> your wiring diagram(myrons) and put back stuff to where its suppose to

> be.

I'll be sure to take a look at the diagram if something isn't functional. I'm also sure this is far from the last thing I'll have to order but since your throwing it out there... crank seals for what?

Re: Won't start, intermittent spark now none

Yes,at least the flyside seal.

Re: Won't start, intermittent spark now none

BRYAN WOJTCZAK /

> Don Ohio Wrote:

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

> Yes,at least the flyside seal.

Part link please? Also what are you seeing that makes you believe I need one? I'm not an old pro at fixing these mopeds yet LOL!

If I can get it running I plan another large order of parts but first waiting to hear it run before I do so.

Re: Won't start, intermittent spark now none

Moped Lar (OFMC) /

In 40 years, oil seals become brittle and leak.

Re: Won't start, intermittent spark now none

You've got the flywheel off, which means it's a simple matter to replace the flywheel side seal. Now's the time!

Re: Won't start, intermittent spark now none

BRYAN WOJTCZAK /

Thanks Don, Lar & Pat for all the advice! Hoping to hear the motor start this weekend parts came in today.

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