Intimitant starting

Paul Bryant said:

I have been having an issue with starting the bike.
Battery is good, starter relay is good, starter motor is good, crank position sensor is clean, all connections have been well cleaned and re assembled.

What happens is some times I go to start the bike and it will fire up straight away just as expected.
Other times (totally random) ignition on, pull the clutch, hit the button, I hear the relay switch, I hear the starter solenoid activate, but the engine will not turn over.
If I put the bike in gear and "rock" the bike a little, it will start up straight away.

Can't figure it out, any suggestions ?

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CrzystghndKC said:

Paul there was just a long thread concerning this same thing and it ended up being the clutch switch. They are a simple plunger switch but it seems the ECU uses this switch to trigger at least 3 functions. I would send a link to the post but I'm not capable. Maybe Kevin can he's smart and knows things.

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Gerald said:

Check and lube starter drive ( bendix ) and spline, check the teeth also.

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Kevin frazier said:

Crank position sensor is clean, is it also tested as good?

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Paul Bryant said:

Yep, had that all apart and done that.

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Rocket Scientist said:

Hi Paul, glad to hear you didn't get earthquaked ! @Mittzy and some of his mates, figured out its the starter relay under the right hand side cover. The spade connections get dodgy and don't send enough power to the solenoid to drive to pinion gear into the flywheel (I think that's why rocking helps). I had that problem for several years. Rebuilt starter switch, big battery cables, all the usual suspects. After I read what they found, I disengaged the terminals from the relay socket and cleaned and re-crimped them. I then cleaned the blades on the relay, then slathered them with die-electric grease and plugged back in. Hasn't done it since !

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CrzystghndKC said:

Paul there was just a long thread concerning this same thing and it ended up being the clutch switch. They are a simple plunger switch but it seems the ECU uses this switch to trigger at least 3 functions. I would send a link to the post but I'm not capable. Maybe Kevin can he's smart and knows things.

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Kevin frazier said:

I would Gary its journeymans thread but this aint it he put a new switch in so back to brainstorming for the viking.

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