No spark from plugs - Honda Rebel Forum
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post #1 of 11 Old 03-12-2019, 10:17 PM Thread Starter
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No spark from plugs

Hi everyone - I am having an issue getting a spark from my plugs. Not sure where to start looking.

Background: My bike (1996 250, 4500 miles) has been sitting in the carport, covered and dry, over the winter. I used it a few times in January and then went to try using it again a few weeks ago. I started the bike with the choke about half, and let it warm up for about 5-10 mins. At about the 10 min mark, the bike died. I went to start it back up, but no luck. Sometimes this happens when it's cold, so I rolled it down the hill a bit and dropped the clutch but no start.

Came back to it this weekend to troubleshoot. I decided to change the oil and then check the plugs. I got no spark from the plugs, so I ordered new ones. New ones now have no spark either.

What things should I try next to address the spark plug issue? It is a little bit confusing to me that it started and ran, but then died and now I have no spark.
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post #2 of 11 Old 03-12-2019, 10:38 PM
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Have you checked the fuses? Are the petcock on, and the kill switch in the run position? Have you checked the battery? Try jumping it from a car battery but be sure the car engine isn't running. If it starts, the bike battery is no good.

There's no need to do extended warm ups while the bike is parked. Let it run for 30 seconds to a minute, hop on and ride. Gradually push the choke off as the engine warms.

Keepin' all the left over parts. Gonna use 'em to build another bike!

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post #3 of 11 Old 03-12-2019, 10:58 PM Thread Starter
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Fuel on, battery was kept charged with a tender, so it should be fine. I just jumped it with my car battery to double check, but still no start.

I'll check the fuses tomorrow.

To be clear, I pulled out the plugs and tested them grounded against the engine, but I see no spark.

It seems weird to me that it ran fine for about 10 minutes a few weeks back, but then died. They fuel is a little bit old, but that shouldn't affect the spark plug working.

1996 Rebel 250
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post #4 of 11 Old 03-12-2019, 11:29 PM
 
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if it cranks and headlight lights, likelihood there is no fuse problem..
called for a tow from friend as mine wouldn't start.. just as he arrived 2 hours later I discovered kill switch was on.. made trailer loading easy once switched to run ~~ Doh ~~

Ignition electrical system is totally independent from starting, charge, and lighting system..
Rebel will push start and run without a battery, tho it is hard on voltage regulator with no battery connected...
connections and safety interlock switches fail... i'd start by checking micro-switch in clutch handle and associated connections, slap the kick stand up several times as you have a safety switch there too..
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96 VS800 Intruder (sold 2018 ), 87 CMX250C Rebel,
79 CB400 Hawk (sold 93), 75 CB350 (sold 83), 71 CB350 (stolen 74)
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post #5 of 11 Old 03-13-2019, 07:30 AM
 
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ran 5-10 min, died, and wouldn't restart, can't get spark......from either side....


like flight and soaked said, double and triple check the obvious first. key on, run-stop in run, kickstand up or trans in N, petcock on....
good solid complete firm connection between plug wire and plug....selected grounding point for spark test is an actual ground back to battery (-) ....


coils and plug wires rarely go out on both sides at the same time, one goes and it still runs, but badly.

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HRF Answer #2 You need to clean your carburetor
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post #6 of 11 Old 03-13-2019, 11:30 AM Thread Starter
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I've been sure to triple check all of the obvious things. Key on, Kill switch off, trans in N (also tried kickstand up, clutch in), petcock on. Can smell gas getting into the engine like it should when I take the plugs off. Tried a spritz of starting fluid at air filter. I'll go check out the things that SoakedKarma suggested tonight (clutch handle switch, kickstand switch), but I'm not exactly sure what I'll be looking for.

How can I be sure the grounding point for spark test is actual ground back to battery? Use some sort of jumper to black? I've just been having it touch the outside of the block. I assume that is what grounds it when it is screwed in.
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post #7 of 11 Old 03-13-2019, 12:55 PM
 
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Quote:
Originally Posted by BizzleB3 View Post

How can I be sure the grounding point for spark test is actual ground back to battery? Use some sort of jumper to black? I've just been having it touch the outside of the block. I assume that is what grounds it when it is screwed in.
have neon spark tester that I can never find..
so I just hold plug base tight against cylinder fins..

96 VS800 Intruder (sold 2018 ), 87 CMX250C Rebel,
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post #8 of 11 Old 03-14-2019, 08:10 AM
 
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Multimeter set to measure ohms will let you check that there is Zero resistance between the block's fin and the battery negative terminal.

2009 Honda Rebel 250; 2009 Honda Shadow 750 Spirit
"The bravest thing for me to do is admit when I am wrong" - unknown
HRF Answer #1 You should take the MSF Rider Course
HRF Answer #2 You need to clean your carburetor
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post #9 of 11 Old 04-20-2019, 12:18 AM Thread Starter
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Just to let people know, checked the CDI box. There was a source signal but not a timing signal. Swapped out the CDI box and the bike started up fine. $50 fix.
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1996 Rebel 250
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post #10 of 11 Old 04-20-2019, 04:47 AM
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Glad you found the problem.

Keepin' all the left over parts. Gonna use 'em to build another bike!

'01 & '09 Rebel 250, '06 Ninja 250, '89 VN 750
Putting your bike year and model in your signature helps others help you!
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