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1994 K75S cranks, won't start

ranbush said:
So the good news is that the plugs are sparking when I hit the starter, altho the spark is kinda weak, yellow-white in color. And the fuel pump makes noise when I hit the starter, and there's fuel in the line going to the injector rail.

The bad news is when I put a voltmeter on the four-year-old Motobatt, when I hit the starter it is going down to 11V or so when cranking. I am using a cheap Harbor Fright voltmeter, is that accurate enough for a load test on the battery?

Time for a new battery?

Thanks for all the replies.
Click to expand...

Ok, I would do three things:
1. Get a new battery
2. Install a new fuel filter
3. Check gap on exhaust valves. They tend to tighten up over time and could lead to those problems that you are experiencing. I had the same issue and exhaust valves were very tight. After adjusting, bikes runs like new (with 81k miles on it).
 
And by the way, the H/F voltmeter is fine for this test - you're looking for the change in voltage, not an "absolute" number; and even for absolutes, the HF is close enough (but don't try to adjust a TPS with it).
 
OK here's the follow up: I'm not ashamed to say, I had it towed to Greg Hutchinson in Redwood City, CA. He has forgotten more about K bikes than I will ever know.

I didn't have it towed to Lee in Livermore because Greg is closer. :dance:heart

So it turns out it was a stuck fuel injection relay. Happy ending.
 
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