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Coil voltage low

  • Thread starter Thread starter overboostin
  • Start date Start date
O

overboostin

Guest
I'm putting my bike back together and getting ready to fire it up. Right now it won't turn over. It's reading 10.25 volts at the coils and a little over 12 at the battery. Would this drop be enough for it to crank forever and not fire? I was planning on doing the coil relay mod, but I'm testing out everything first. Thanks!
 
coil relay mod has nothing to do with the motor turning over....

but it sounds like your motor is turning over but not starting....

you need air, gas, and spark, so verify you have all 3

.
 
overboostin said:
I'm putting my bike back together and getting ready to fire it up. Right now it won't turn over. It's reading 10.25 volts at the coils and a little over 12 at the battery. Would this drop be enough for it to crank forever and not fire? I was planning on doing the coil relay mod, but I'm testing out everything first. Thanks!
Click to expand...

My GS1100E which fires and runs perfectly would only start with starter fluid when it has 10.5V on aftermarket Accel coils.

When you crank it probably goes much lower than that.
 
GateKeeper said:
coil relay mod has nothing to do with the motor turning over....

but it sounds like your motor is turning over but not starting....

you need air, gas, and spark, so verify you have all 3

.
Click to expand...

Yes the motor turns over but it will not start. It has fuel as well as air.
 
posplayr said:
My GS1100E which fires and runs perfectly would only start with starter fluid when it has 10.5V on aftermarket Accel coils.

When you crank it probably goes much lower than that.
Click to expand...

I would check that. If its 10.5 with the key on (headlight too ?) It will probably drop much lower when cranking. Wont start like that. Got a good battery ?
 
This new to you motor might need some coaxing to revive it. Make sure "choke" is operating fully at carb end- after a bit of cranking with FULL choke, plugs will appear slightly wet. If not ,make sure petcock is filling carbs on prime spot and the throttle cable and/or idle stop screw is not holding the throttle plates open (this defeats purpose of enrichment system)
With an old battery, my coil and battery voltages were similar to yours , but it still started- some ignitors are more sensitive then others to low voltage.
 
My bike would not start with it's electronic ignition with 10.5V. It would be a good time to go through the electrical system and clean or replace any heat or corrosion damaged electrical connections in the harness. All switches, grounds and connections in the headlight need attention also. Take a look at the fuse box too. Use dielectric grease to protect the connections from moisture and corrosion. Then try to get it running. This is a good source for connectors and proper crimping tools. (Since it was mentioned, starting fluid if it has ether in it will absolutely scrub all the oil off of your cylinder walls and should never be used on anything with small cylinders.) http://www.vintageconnections.com/
 
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OldVet66 said:
My bike would not start with it's electronic ignition with 10.5V. It would be a good time to go through the electrical system and clean or replace any heat or corrosion damaged electrical connections in the harness. All switches, grounds and connections in the headlight need attention also. Take a look at the fuse box too. Use dielectric grease to protect the connections from moisture and corrosion. Then try to get it running. This is a good source for connectors and proper crimping tools. (Since it was mentioned, starting fluid if it has ether in it will absolutely scrub all the oil off of your cylinder walls and should never be used on anything with small cylinders.) http://www.vintageconnections.com/
Click to expand...

I have seen this warning before and have therefore been cautious. The can I used is called Pryroil "Starting Fluid". It claims to have an upper cylinder lubricant.

http://www.valvoline.com/products/brands/pyroil/starting-fluid/58

I never shot it directly into a cylinder and only gave a couple of 1/4 sec puffs into a pod which did the trick to get it to fire. :o

Not saying this is a good thing just perhaps not as bad as you might have imagined.

How To Use
For fast, easy starting, spray Pyroil? Starting Fluid into the air intake for 2-3 seconds (no more than 3 seconds), then start the engine. Besides cars and trucks, Pyroil? Starting Fluid works great on lawn mowers, trimmers, chain saws, motorcycles, etc. Note: product is extremely flammable and contains ethyl ester and petroleum distillates.
Click to expand...
 
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