1984 ATC 70. Killin Me

[hondakawi3wheel]

Been around the site and 3wheelers for years, lost my old log in information to the site so I'll just start over. I have so many projects layin around but recently gotten back into my 3wheelers. I got my old '84 Honda atc 70 out of the barn a couple weeks ago and got some new tires for it, built a custom rear grab bar it, just really startin to have some fun with it. I'd ride it around my back yard for awhile then head off down the alley. I'd get aways down the alley and it would just quit on me, I'd push it back put a new plug in and after several pulls it'd fire up and run like a champ again. If I went fast down the alley it quit again. Then the other day I couldnt get it to start again, I've always thought it had a weak spark cause it would foul plugs real quick. I ordered a new coil, got it in today so I put it on and still nothing. Here's whats going on and my reasoning for thinking its the coil. If I take the black wire that plugs in to the coil apart from the black wire coming out of the motor and put a test light in the black wire coming the motor the light lights up real bright, but if I hook the black wires back up and put the test light in the spark plug wire or on the female connector that hooks to the coil I get nothing. I am stumped. I've checked all the grounds with the test light and its all good. I even made a single wire from the black motor wire to the coil to get rid of the kill switch and still nothing. So I don't know. Any help would be greatly appreciated. Thanks, Kody.

[Thorpe]

Well, first off, I would invest in a ohm meter...

[hondakawi3wheel]

Like this?

[shortline10]

Replace the points

[hondakawi3wheel]

So the points aren't putting out enough juice to feed the coil? Why will they still light up the test light bright?

[briano]

X2 on the points. And use an NGK spark plug if you aren't already, all of my 70s hate to run on champion plugs.

[Blown 331]

Did you at least adjust the points? I find that as the points wear the gap gets narrower which retards the timing. If they are not longer opening you wont have spark. I have had a bunch of bad running 70s just because the points gap was too narrow. Points are just a switch that opens and closes the ground circuit for the coil, they dont really put out any juice.

[barnett468]

Hello;

After you do the things suggested, if it still does not start, unplug the stator wire, remove the spark plug and have someone kick it whicle you test the voltage with a meter that retains peak voltages. if it is less than 35 volts it likely will not run. If this is the case it is the stator coil and/or the flywheel has lost some magnetism. You can get them recharged.

[barnett468]

You can get the flywheel recharged not the stator coil, it is not magnetized.

I have no edit button, lol.

[hondakawi3wheel]

Alright I ordered a set of points and condenser, stator plate rebuild kit and a flywheel puller from dratv. Hopefully itll run like a champ when I get it back together. I also learned you cant run led lights directly off the motor lol. Anyways, ill let y'all know if it runs when its back together. On a side note, I'd like to keep this one pretty much stock but I know where about 3 or 4 more atc 70's are sitting and could prolly get one or all of them, but I'd like to build more of a racer style one and have been looking at lifans motors and found a complete kit on amazon and wanted to hear what you guys think of it, like if it'll bolt right up or what modifications need to done to make it work.http://www.amazon.com/gp/aw/d/B004Q1...ref=mp_s_a_1_2. Let me know what you think. Thanks, Kody

[czac]

probably the most helpful reply here: Stay out of the Alley!
lol