starting issues with fzs 690

[Fazerider]

You say starting takes forever but it turns over ok… that doesn't sound like a starter problem, more like carbs or sparks.
Anyway, to answer the question, the starter motor is the black cylinder under carbs 3&4. If you get one probe of your multimeter on the terminal on the starter and the other probe connected to the chassis, you should get a reading of 9 to 12 volts when you thumb the starter button.