Question about Honda Motorcycles
So i have spark to all four plugs when cranking the motor over the bike starts fine then the rear cylinder quits firing after 2 seconds that cylinder stops firing. but as soon as i hit the start button it starts that cylinder right back up again and 2seconds later its off plzz help if any ideas
You have 12 volts going to the coils... use a test light to see if this power drops out... then you need to find out why... if it doesn't drop out then I would be looking at the pickup coil because this triggers the coil to spark... if this isn't the issue, suspect a bad coil
Posted on Dec 28, 2013
Testimonial: "just ordered new pick up coils cuz i tried switching coils last weekend and same issue and there is no power drop and the rear cylinder spark is a lot weaker than the front cylinder spark so this is a good asumption we will see as soon as i get my pickup coils from ebay thanks for the advice we will see in a few days what happens fingers crossed thanks again"
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
SOURCE: bike only fires once
Okay, let's have a look at it. Say Ahaaa.
The probable cause of the problem is not the spark. Get a fresh set of Stock NGK spark plugs, ground the plus to the engine, and check each cylinder for spark as the starter button is pressed for 3 seconds or so. I will wager that the spark is present.
The likely problem is the fresh gas was put into a very rusty gas tank. Bits of rust now inhabit your carb and are having fun plugging up the carb. Look at the gas valve. With a little luck there is a small bowl behind the valve. Remove it and tell me what you see in the bowl.
Posted on Apr 11, 2009
SOURCE: NO SPARK
most likely you have a CDI box failure. the easiest way to find out tho is take it to a dealer and have them run a diagnostic test, usually around 60$ find out whats wrong and depending on the problem have them fix it or tackle the issue yourself.
Posted on May 12, 2009
If the spark appears to be weak only for the two front cylinders, then I would suggest checking the electrical connections for the ignition coils.
If the spark for the other two cylinders looks the same (yellow), then I'd suggest checking the compression on the non-functioning cylinders. A compression reading of 140~160PSI is what you're looking for. Low compression indicates internal engine damage - or could be from something relatively simple - like insufficient valve tappet clearance.
If the bike has been sitting for a long period of time, it could be that the carburetors are plugged up with fuel varnish. This can cause some cylinders to not run. A complete carb disassembly and clean-out will be needed.
Posted on Oct 23, 2009
Testimonial: "thanks for that feed back . there is plenty of fuel and compression is non existant on front left and 80 psi on front right,I suspect cam wear????"
With Ignition switch off :-
1st Check for bad connections, broken/crushed wires, continuity & resistance between the cap, HT lead, coil, ignition coil primary wires
2nd Disconnect the CDI unit from its connector & check for the same between the loom side of the connector back to the coil
3rd Check coil is earthed
If all OK suspect the CDI unit but double check everything first( there are some more checks as well), as these are very expensive
Please rate this solution well if it has helped !!
Any comments welcome
Posted on May 11, 2010
Tips for a great answer:
Mar 01, 2015 | Power Motorcycles
Sep 22, 2014 | Motorcycles
Jan 31, 2014 | 1986 Honda VT 1100 C
Jan 24, 2018 | 1986 Honda VT 1100 C
Jun 23, 2012 | Honda VT 1100 C Shadow Spirit Motorcycles
Aug 05, 2011 | 1998 Honda VT 1100 C Shadow Spirit
Jan 26, 2011 | 1995 Suzuki VS 800 Intruder
Oct 25, 2009 | 1986 Honda VT 1100 C
Apr 10, 2009 | 1986 Honda VT 1100 C
131 people viewed this question
Usually answered in minutes!