K100 wont start right - K-Bikes.com - Excellence in Motion
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post #1 of 3 (permalink) Old Jun 3rd, 2010, 1:07 pm Thread Starter
Join Date: Jun 2010
Location: Sterling, VA, USA
Posts: 4
Question K100 wont start right

Hey thanks in advance for the help...
I recently bought a K100lt and need help to get it running.
The bike will start but only by spraying easy start into the intake which will allow it to run momentarily.

The starter motor/battery are OK as the engine cranks strongly.
The fuel pump is new and delivers pressure. The fuel filter is new.
When cranking there is a spark at each spark plug lead.
Main suspects are in the fuel system, i) fuel injection relay?, ii) fuel injection computer?

Any advice or help would be appreciated
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post #2 of 3 (permalink) Old Jun 3rd, 2010, 7:06 pm
Join Date: Mar 2004
Location: , , UK
Posts: 3,750
Can you remove an injector and see if fuel is coming through? That would at least tell you they were opening. Alternatively, with a 'scope you should be able to see if there is dc pulsing to the injectors, if not look at the relay. The efi brain is the source of pulses for injectors.

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post #3 of 3 (permalink) Old Jun 4th, 2010, 5:59 am
Join Date: Mar 2009
Location: Clifton Beach, Tasmania, Australia
Posts: 95
One of the biggest problems with these bikes is as simple as bad connections or degraded earths over time. As Vox says the efi brain controls the injectors and the plug that connects to it can be a real pain so removing it and cleaning the contacts with your favourite contact cleaner certainly won't hurt and make sure it CLICKS back into place.

Phil Mars

1984 K100RT
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