Suddenly won't start

[Cazzy_R]

 Sounds like a bad battery to me.

[zed9]

Originally Posted by Cazzy_R

Sounds like a bad battery to me.

+1
I have a friend that’s a pro motorcycle mechanic of over thirty years. He told me 95% of electrical problems with a bike are related to bad batteries and/or bad battery connections.

[Smoky]

Even though I'm sure that's not the case, I've got white spark on the plugs.  Not bluish. Voltmeter and dash show battery 12.5 at rest. I will try another battery this evening and post up results.

[Smoky]

Battery connections are clean and tight. 2 different volt/ohm meters 12.6 and 12.7 dash indicates 12.7 as well. Pulled the plugs again and they are now wet from priming fuel down the throttle bodies but getting spark. Could it have jumped timing to the cams?

[zed9]

Originally Posted by Smoky

Battery connections are clean and tight. 2 different volt/ohm meters 12.6 and 12.7 dash indicates 12.7 as well. Pulled the plugs again and they are now wet from priming fuel down the throttle bodies but getting spark. Could it have jumped timing to the cams?

Keep the volt meter on the battery while cranking. What does it drop to?
A healthy battery should see 11 volts or so. A weak battery will drop to 10 volts and lower.

[Smoky]

Battery voltage during cranking drops to 11.1 to 11.3

[Cazzy_R]

Originally Posted by Smoky

Could it have jumped timing to the cams?

I'd expect it to run poorly, rather than not at all if it was cam timing. Did you have any cam chain rattles before this occurred?
Is the fuel fresh? Had you recently filled up prior to this problem?
I still think it'd be wise to try a known/new battery.

[zed9]

Is there a procedure in the manual to test the throttle position sensor?

[Smoky]

Will have to check manual for throttle position sensor. Fuel not fresh but not old by any means.  No cam chain rattles. Tensioner retracts and extends as it should.

[zed9]

I found this in the repair manual. It is a screenshot off my old iPad. I don’t know how to transfer it to my new iPad.
But here it is.