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NC21 Electrical Problem

7 posts Started 2 Nov 2016 Last recovered post 8 Nov 2016 Wayback Machine snapshot 6 Jul 2017

#1

I am restoring an NC21 VFR 400K and i know nothing about motorcycles. when ever i hit the engine start i hear the starting motor but the engine wont start and there is no electricity on the spark plug what seems to be the problem? the battery is new, I just rebuild the carb and new spark plugs 

#2

Kill switch?

#3

its on the  "RUN" mode

#4

On bike of that vintage, if you're getting no spark at all plugs you'd want to check the ignition pulse generator, ignition control module, neutral switch and side stand switch.   The easy checks are to look for any dis-connected or bad wiring.  Also check the fuses.  For more detailed diagnostics it would probably be best to locate a service manual. 

#5
Cogswell, 11/3/2016 at 9:03 AM

On bike of that vintage, if you're getting no spark at all plugs you'd want to check the ignition pulse generator, ignition control module, neutral switch and side stand switch.   The easy checks are to look for any dis-connected or bad wiring.  Also check the fuses.  For more detailed diagnostics it would probably be best to locate a service manual. 

do you have an NC21 or NC24? i am getting 422 ohms on my pulse generator using my fluk multi meter can you please measure your pulse generator if you have an NC21 or NC24 I want to compare mine to  yours. 

#6
10 hours ago, shonga

do you have an NC21 or NC24? i am getting 422 ohms on my pulse generator using my fluk multi meter can you please measure your pulse generator if you have an NC21 or NC24 I want to compare mine to  yours. 

No - not one in my garage.    The suggestion though was that the principles ignition systems of that era were based on are common to most all bikes, though specifics vary.  A manual would probably make quicker work out of tracking down the issue. 

#7

it says 450 to 550 ohms i got 423 . do you think its the reason i don't get spark? 

End of thread · 7 posts recovered Wayback Machine snapshot 6 Jul 2017