No fire rear cylinder
- Thread starter demossw4
- Start date
chubs
Guru
Good spark to rear plug? Good plug wire ? If ya have a dual fire coil, try switching plug wire positions and see if the rear fires. run a compression check on both cylinders. I'm NOT a mechanic by any sense of the word, but I've tried a lot of things that probably won't work, on the off chance that they might.
Davidg
Member
start with the basic stuff, coil test, plug and wire, use a multi meter. when cranking to you get any spitting out of air (compression relief valve). how did it run just prior to the dead cylinder issue?Can't get rear cylinder to fire good plug good coil can anybody help thanks
Sent from my VS501 using Tapatalk
Jersey Big Mike
100K mile club
Was anything done to the bike before this happened? Or is this out of the blue?Can't get rear cylinder to fire good plug good coil can anybody help thanks
Sent from my VS501 using Tapatalk
Out of the blue
Sent from my VS501 using Tapatalk
Electrical Variable Tree:
1. Connector not connected... Obvious, right?
2. Wire out of connector... A tug ever so light at each wire to see the integrity into the connector.
3. Short to ground/signal out of range... Computer bike, right? The black box is a processor. It needs a balancedesign factor it's handcuffed to. Once that value is out of range (crank sensor makes AC so no or a weak input up the wire) is this variable. The other variable is a short or blown fuse, where a hot wire blows a fuse, a ground does not.
1. Even though it's connected it could corrode the touch points and not pass the electricity.
2. The wire out could be a broken wire inside the covering. How could you read this? Is not wire out of connector with a break? The obvious one for this is a wire out of connector. But this is how you have to think out the wire variable as this is just the surface of the troubletree variables.
3. The short to ground is not happening, right? No fuse blown. If say there is spark to the cylinder, then this is not electrical.
Running Variable Tree:
A. Spark... Obvious, right?
B. Fuel... Where we think if the one carb can run the other cylinder, it's not fuel, right?
C. Compression... Ah, the tail chasing variable. No one wants to chase the very first variable so you do not chase your tail looking at A and B for weaks on end because you have a week cylinder going assbackwords in the chase.
Signed,
NOLTChubs
1. Connector not connected... Obvious, right?
2. Wire out of connector... A tug ever so light at each wire to see the integrity into the connector.
3. Short to ground/signal out of range... Computer bike, right? The black box is a processor. It needs a balancedesign factor it's handcuffed to. Once that value is out of range (crank sensor makes AC so no or a weak input up the wire) is this variable. The other variable is a short or blown fuse, where a hot wire blows a fuse, a ground does not.
1. Even though it's connected it could corrode the touch points and not pass the electricity.
2. The wire out could be a broken wire inside the covering. How could you read this? Is not wire out of connector with a break? The obvious one for this is a wire out of connector. But this is how you have to think out the wire variable as this is just the surface of the troubletree variables.
3. The short to ground is not happening, right? No fuse blown. If say there is spark to the cylinder, then this is not electrical.
Running Variable Tree:
A. Spark... Obvious, right?
B. Fuel... Where we think if the one carb can run the other cylinder, it's not fuel, right?
C. Compression... Ah, the tail chasing variable. No one wants to chase the very first variable so you do not chase your tail looking at A and B for weaks on end because you have a week cylinder going assbackwords in the chase.
Signed,
NOLTChubs
chubs
Guru
I only mentioned the plug wires because I had a situation where my rear cylinder was cutting out. Replaced the plugs, No change, Checked compression , all O K , switched plug wire position, Front cylinder misfires. Finally found that the rear plug wire wasn't into the coil good and solid. ( bike had been running fine then suddenly started having the problem also)