Question about 1990 Honda CBR 600 F(1)L

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I cant get my bike to fire up, its getting spark, i just replaced the main harness because prior owner modded for track use. so instead of having things wrong i went back to stock harness and now its getting spark and gas but wont fire up...

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Hi...I see you have fire but wont start.... ok to solve this problem., first you may have to check for bad ground connnection on your wire system..look check all your terminal connection check also your electronic ingnition box make sure you have the right voltage, The spark will appear but not strong enough to start your engine,, the spark as to be a clear blue
not yellowish like a wear out spake plug...Good Luck

Posted on Oct 15, 2010

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Honda VT 1100 C Shadow engine management warning light comes on


Hi, Anonymous, it should be noted that the reasons your check engine light or CEL stays on constantly or flashes and your bike will or will not start and may turn over or not, these conditions will vary from bike to bike depending on the year, make, and model and you should always refer to your owners/service manual for proper diagnostic procedures. It should also be noted that any type of prior work done to the bike or an abnormal event occurrence IE: adding accessories, electrical curiosity/adventures, laying bike down/crashes, rainstorms/bike washings just before CEL light issues started can be significant hints/aids into tracking down the gremlin, also carry the appropriate jumper wire to access fault codes to reduce the risk of being stranded or towed also keep in mind that your CEL comes to life if anything, and I do mean anything isn't 100% with the ECM like parameter spikes. This means that you could be staring at a major repair, or your speedometer sensor is contaminated and needs to be cleaned.
And the usual suspects are:
1. Severely discharged or a damaged battery check the terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary, you should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead acid batteries.
2. Faulty charging system.
3. Faulty system sensor some models have up to 40 sensors
4. Faulty safety switches: run/off, ignition, clutch lever, neutral, side stand, tip over, fuel, and or their connections.
5. The engine got wet where it didn't like to get wet.
6. Faulty ignition circuit spark plugs, coils, cables etc.
7. Broken wire or worn insulation exposing wire to a ground situation especially inside wire harness at tight bends around fairing brackets, under dash panels, under fuel tanks over cylinder heads etc. Many harnesses are open on the ends that will allow water to enter and accumulate at v-bends.
Dielectric grease and contact cleaner are your best friends for wire/cable/harness connectors, look for corroded, broken, or loose pins/sockets.
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1 Answer

Engine management light on as soon as it starts speedo not working would that make it flash ??? checked all other oils any idears to ceck something


Hi, Darylr125, it should be noted that the reasons your EFI light stays on constantly or flashes and your bike will or will not start and may turn over or not, these conditions will vary from bike to bike depending on the year, make, and model and you should always refer to your owners/service manual for proper diagnostic procedures. It should also be noted that any type of prior work done to the bike or an abnormal event occurrence IE: adding accessories, electrical curiosity/adventures, laying bike down/crashes, rainstorms/bike washings just before EFI light issues started can be significant hints/aids into tracking down the gremlin, also carry the appropriate jumper wire to access fault codes to reduce the risk of being stranded or towed, that being said the usual suspects are:
1. Faulty Fuel Pump, fuse or system relay switch.
2. Battery starting to fail due to old age/damage, perform a load test.
3. Discharged battery, check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Faulty switches/sensors: run/off, ignition, clutch lever, neutral, side stand, tip over, fuel, and or their connections.
5. Broken wire or worn insulation exposing wire to a ground situation especially inside wire harness at tight bends around fairing brackets, under dash panels, under fuel tanks over cylinder heads etc. Many harnesses are open on the ends that will allow water to enter and accumulate at v-bends.
Dielectric grease and contact cleaner are your best friends for wire/cable/harness connectors, look for corroded, broken, or loose pins/sockets. For more information about your issue please click on the links below. Good luck and have a nice day.
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1 Answer

Hello . 2009 rmz 450 no fire. Was on 4th race of the day when loss power engine poped, spit and died. will not start. No spark complete rebuild of engine 2 weeks prior.Crank,piston,cylinder, Bike was...


Hi, Greg did you know your first name is better than your Thumper? and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead acid batteries.
3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Loose connection at ignition coil or plug between ignition sensor and module.
5. Spark plug cables in bad condition, shorting/leaking, spark plug cable connections loose check for spark leakage in the dark.
6. Faulty ignition coil or electronic control module.
7. Faulty CKP, CMP, or BAS sensor.
8. Faulty ignition switch.
9. Tilt sensor needs a reset.
10. Security alarm failing to disarm needs reset
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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1 Answer

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The TTR-125 Carburetor's Run Lean by design. Mine had the same issues till I found a post on Thumpertalk.com on Carb and air box Mod. This is a good starting point on gets; 110 and 112.5 main and 17.5 pilot. But you must check spark plug coloring to make sure the jetting is correct. Check spark plug after the bike has been ridden for a wile. I also took out the stock baffle and replaced it with exhaust tip and now it fires up after a few kicks and worms up in a few minutes.

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1 Answer

What,s the reason for my honda crf 100 sparkplug getting so dirty all the time i need to keep cleaning it to get it to fire everytime can anyone assist on this problem please help????????????????


The bike may have the wrong spark plug in it. The stock plug is NGK, CR7HSA. You may want to go to a hotter plug > CR6HSA. It is also possible that a prior owner installed a bigger main jet. Check the main jet size. The jet will have a number stamped on one side. Stock is #92. A #98 jet would be a richer jet. Please rate my answer. Thanks.

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1 Answer

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| have a Trike with a gs850 g suzuki engine. It needs rewiring so where do i start. Its not so much the charging system but the wiring to the accessories has been mucked around with.What wire do i use can...


The simple answer is yes it can be done - and it need not be a nightmare. You need to teach yourself a little more about how the GS engine runs - stator- r/r - ignightor - timing - coils - plugs. It may well be that a loom from the same engine would be helpfull, but it will require some mods to avoid some of the GS wiring pitfalls, which is why we GS owners modify them to give maximum power to the coils for full spark. Try the GSRESOURCE site for more tips - join and post questions as they pop up - see u there ::)

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Try to change coil from one side to the other, if the spark goes to 2 & 3 but not 1 & 4 you need the coil replaced or find the power loss (blown fuse) .I have not worked on that bike so am not sure. also color code on wires in the harness will be enough to follow wires without the book,no need to cut them open just note the colors at the point you are trying to check,follow along the way untill that color comes to a conector. or to the fuse buss or device.A multi meter can check condition between points Hope that will help you good luck .Joe

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