Yamaha is just as good as Honda, Kawasaki, Sizuki, KYM, and Husquvarna they make good powerfull bikes.
RELAYS bad'
When headlamps on the Yamaha Mio are out, they may have burned out and need to be replaced. The Mio may also have bad wiring or bad fuses.
No Spark
you can't throw it away and buy a new one. one of the bad sides owning yamaha.
coil is bad
bad radiator cap
If your solenoid is bad on your atv raptor it will just click when trying to start it
Your solenoid is bad.
water pump seal bad
You might have a bad battery they arent very expensive
Check for loose wires, then most likely a bad coil or rusty mag maybe bad cdi or stator
The oil filter is located at the back of the Yamaha but be careful because you could seriously injur yourself when trying to change the filter of the oil because it's bad.