Hi Gary new to this forum stuff, you seem to be a guru I have a 71 that I just got back on the road And was running great But when I started it the other day it fired right up I don’t on choke perfect I turn the choke off and it stalled I never had spark since I have power to the coil‘s power of the points points are new and reset all lights work coils omh out right not nothing at the plugs,I’m baffled any input would be a big help thanksMy physic powers are weak this morning, what ignition?
As always testing is key, random parts replacement is the long hard $$$ way to find a problem.
Have spark at point going to see volts there tomorrowfirst check.
Turn engine over to where both points are open. Turn on key and short one of the points with a screwdriver . Do the same with the other set of points.
if no spark on ether set then there is a problem with ether the ground or power.
If one sparks then check plug connections at coil and plug caps on non sparking ssie.
12 volts at the points when open? If not start working backwards til you find 12 volts.
Have spark at point going to see volts there tomorrow
there are 2 condensers packaged together, one condenser wire goes to left side coil 3 way, other to RH 3 way junction. If that is when your problems started you now know how to fix it.Changed condenser today two coils one condenser both condenser lead go to a three way connector,seem odd
f no spark on ether set then there is a problem with ether the ground or power.
If one sparks then check plug connections at coil and plug caps on non sparking side.
Both condenser leads connect to one gray and go in a harness and lead back to the batterythere are 2 condensers packaged together, one condenser wire goes to left side coil 3 way, other to RH 3 way junction. If that is when your problems started you now know how to fix it.
View attachment 184568
Wires may not be these colors.
New points may have grease on them they need to be cleaned with contact cleaner. slide white copier paper through til it comes out clean.
The plugs should arc when you open the points (remove the screwdriver that's shorting them closed)I should have been clear that the the plugs should fire when you short the points.
Could the coils omh right but still be badthere are 2 condensers packaged together, one condenser wire goes to left side coil 3 way, other to RH 3 way junction. If that is when your problems started you now know how to fix it.
View attachment 184568
Wires may not be these colors.
New points may have grease on them they need to be cleaned with contact cleaner. slide white copier paper through til it comes out clean.
PS very early in a situation like this I remove the plugs and heat em red hot with a propane torch then wire brush them clean. A fuel/oil film on central electrode can bleed off current before it builds enough to jump a spark.
Nearly beyond count how many times that's got me back to making brmm brmm noises.
First I want to thank you for your help,now just had another bike guy here for 3 hours and everything checks out.the points do spark a bit but 12.5 v everywhere but no spark. he saw my Ridgid frame and said time to build it lol don’t have enough parts yetIf primary AND secondary ohm to specs they are usually good. Coils must also be bolted to a ground that completes the secondary circuit through the spark plug engine etc.
As above you have two completely separate ignition systems it's unlikely both failed at the same time.
Leaving the ignition on, motor not turning, can fry the primary winding in an ignition coil.
check the secondary (sparkplug) wires, and the plug caps they should ohm out at about 5K ohms.
There's one of your problems. Each condenser lead goes to seperate wires. Go back and read all the stuff Gary told ya.Both condenser leads connect to one gray and go in a harness and lead back to the battery