79 grycner

i need help... this awesome moped won't spark... i'm too broke to buy a manual and i cant figure out the wiring. it's just a little sachs 505 motor. i'm hoping that it's not the magneto, and that it's just poor wiring (which by the looks of things, seems to be the case).

if anyone either has wiring diagrams, or just knows what the hell they're doing, can you help me out. also, if anyone has ever seen/ owned one of these, let me know... i've been checking around a little bit, and it seems to be one of a kind. it looks really similar to a sachs lover.

anyways.. help me if you can.

thanks

dustin

Re: 79 grycner

I know there are some Sachs people here-- You'll get some help

Can you post a pic of it?

You could do a search in the moped owners directory and see if anyone listed as having one is currently posting or lives near you .

good luck

Re: 79 grycner

thanks wayne...

i'm pretty computer illiterate, but i'll try to work on getting a picture up on here.

i just looked again at the photo archive here, and if you want a quick glimpse of what my bike looks like, then check out the 1979 sachs lover, and picture it with a set of passenger pegs, a little square seat on the back rack, a pretty beat up orange and white paint job as opposed to yellow, and grycner on the tank instead of lover. other than that it's pretty much identical. except i just rescued this thing from about a 12 year stay in a donkey feild here in california. it needs some love, but it's starting to come along.

anyways, thanks again.

later,

dustin

Re: 79 grycner

Are you saying it's a 2-seater, sort of? wow-- that's a rare one in the world of mopeds-- I can only think of the Vespa Grande, which is designed for 2...

sounds like a sweet bike-- I'm too tired to check out the photo, but tomorrow I'll look at the one you mention...

Re: 79 grycner

awesome... yeah, i know it's rare... that's why i'm so excited to get it fired up.

Re: 79 grycner

Ron Brown /

Dustin,

First, click resources, then articles and check out Fred's How to Fix Your Moped.

What follows is how to check out a typical moped ignition system I posted here in the past.

Ron

If you have a vom, check the ignition components as follows:

Disconect the wires from the points. One of these wires goes to the magneto ignition power coil. You should read a low resistance to ground on this wire, 1-2 ohms.

Another wire goes to the condensor, read this to ground on RXMAX, that is your highest resistance range, the needle should kick, then settle down to infinity. Reverse the vom leads, same thing should happen.

Another wire goes to the ignition coil primary, this connection is also connected to the kill switch. Disconnect the kill switch wire only from the ignition coil, the wire to the coil should read 1-2 ohms to ground.

From the wire to the kill switch, to ground, you should read infinity with the switch in "run" and 0 ohms with the switch in "stop".

Connect the vom from ground to the wire terminal on the points and make sure they are 0 ohms when closed and infinity when open. This seems dumb, but sometimes points that look clean do not connect.

Re-attach all of the wires to the points. Disconnect the wire from the points at the ignition coil. Measure this with the vom, it should read near 0 ohms. If your meter is sensitive enough, you should see a slight deflection of the pointer as the points open and close.

With the vom still attached and set to about 12v DC range, spin the motor by hand. You should see some deflection of the meter needle.

Pull your plug (spark, that is) and make sure the piston is at or very near the top of it's stroke when the points open.

Re-connect the coil wire. Measure from the plug cap to ground, you should read 5-15k ohms. If this is infinity, unscrew the plug cap from the wire and read through it. This should be 5-15k ohms, if it is open, replace it, if greater than 15k ohms, it may still work, but replace it with a paper clip for test starting then re-install it after you get the ped running.

Read from the end of the plug wire to ground through the coil, you should see 1-5k ohms. If this is infinity, the coil is bad.

Lastly, using the ohmsX1 scale, verify that all of the grounds really are.

None of these tests are guaranteed to indicate a problem, especially where you read coil resistances and they seem ok. Substitution is the best test here.

To test the coil, connect a spark plug from the plug wire to coil ground, connect an ignition condensor (any will do for this test) between the points terminal and coil ground. Connect the negative of a 6V battery to coil ground and touch the points terminal momentarily with the positive lead. This should give you a spark at the plug.

Re: 79 grycner

thanks a lot ron, i'm sure this will help out a lot.

dustin

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