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post #1 of 11 (permalink) Old 07-10-2019, 11:45 PM Thread Starter
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2016 Honda 420

Spark issues..... has really good spark when you first hit the start button and then there’s nothing for about 2-3 seconds what can it be
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post #2 of 11 (permalink) Old 07-10-2019, 11:51 PM
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Spark issues..... has really good spark when you first hit the start button and then there’s nothing for about 2-3 seconds what can it be
Is your batter fully charged?? That's the first thing to check.
Is battery new or older.
Has bike been sitting or used often?
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post #3 of 11 (permalink) Old 07-10-2019, 11:54 PM Thread Starter
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Brand new battery , spark plug and spark plug cap
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post #4 of 11 (permalink) Old 07-10-2019, 11:56 PM Thread Starter
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It was running this winter and when I tired starting it this spring it won’t start
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post #5 of 11 (permalink) Old 07-11-2019, 12:38 AM
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It was running this winter and when I tired starting it this spring it won’t start
The problem is that there could be several issues. It's always smart to start with the most simple causes of the problem and go from there or you could end up spending a bunch of money needlessly.

Okay, you said the battery is new. Are you positive it is fully charged?? Put in on a trickle charger to be sure. New batteries are not always fully charged.

Recheck your battery connections. Use a wire brush to clean the connectors if needed.

Did you install a NGK spark plug? If not, you need to.

Check for a loose connection at the PCM/ECM. I think it's gray in color and is located forward of the seat.

Check the starter motor cable connection. Disconnect it, clean and reconnect.

Since it seems to be dropping voltage it's not likely, but be sure your kill switch if OFF. LOL
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post #6 of 11 (permalink) Old 07-11-2019, 11:42 AM Thread Starter
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Cleaned all the posts off unplugged the ECM plugged it all back in and still nothing ... I tried the ecm from the broke down quad on a different quad it runs with it I tired the coil and cap as well they all work on a different quad ....can it be a stator issue ???
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post #7 of 11 (permalink) Old 07-11-2019, 12:44 PM
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Does it have a hand start on it.. Wondering if the flywheel bolt wasn't torqued and it has sheered the key.


I have way to much experience on that pull starter assembly and rear crank bearing, don't ask.
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post #8 of 11 (permalink) Old 07-11-2019, 01:24 PM Thread Starter
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It does have a pull cord on this unit ....
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post #9 of 11 (permalink) Old 07-11-2019, 01:26 PM Thread Starter
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Wouldn’t you think It would have sheared off awhile ago .. it has 9500km on it
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post #10 of 11 (permalink) Old 07-11-2019, 02:24 PM
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Remove the hand crank and see if the adapter assembly is loose on the back of the flywheel. You might need to remove the air box.

This is just my guess


I will tell you my story if you find this to be the problem, its embarrassing.....

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