Intermittent starting problem

[Ben sIII]

So it was cranking, the starter motor was spinning at normal speed but the engine not starting? Or the starter was not spinning?

in that instance the starter motor wont spin, you'll hear the relay click, but unless the starter motor is in the right position it wont get enough current to spin, hence it is intermittent.

The push start means fuelling, spark, air etc is all ok.

 

[TownsendsFJR1300]

Sounds like a failing starter,

Yamaha sells that entire plate, all assembled for a reasonable price.

Mine failed at about 36,000 miles. You can see the one brush really worn out: