WHERE IS FUSES THAT WOULD PREVENT FROM GETTING HOT

Check for corrosion on fuses if needed use a wire brush and bulb grease to prevent future corrosion.

PLease, check if the check engine light lit up when you turn the switch, if it doesn't lit up, your EMC (computer) is not getting any electricity. And that could be the reason that you the fuses are OK but it won't start.

The problem is most likely a short/breach somewhere in the line. If the fuse hasn't blown, make sure you are using the proper size fuse to prevent damage to wiring in hard to reach places. Some fuses will naturally run hot depending on the application. If this is an automobile, check under moving parts like electric seats for a cut or exposed wire.

Why has the fuse not blown? If the wire is getting this hot then the fuse if correctly sized should blow to prevent a burnout. You failed to give the year of the bike so cannot help any further. Check all fuses for correct rating. Have you installed extra electrical equipment incorrectly? Overload on the system perhaps? Unless you understand auto electrics and have access to a DC clamp meter to check all circuits then I sugest you bring your bike to a dealer before it goes up in smoke!

Check the thermal coupler a copper thermometer for your stove after checking all the fuses in stove and circuit breaker box of house to see if any have tripped. Circuit Breakers should have the switches all in a line. Any not in the lie will be tripped. Fuses in your stove are usually in the top part of the stove where the instruments are and fuses screw out and visually are easy to detect if they are blown or not. Remember all ways Unplug what you are working on to prevent shock

Cover your sun lounger with a towel when you are not sittingon it to prevent it getting too hot.

What year, make and model do you have?

make sure that you have installed a wire fuse inbetween your battery and your amplifier that is the most common reason for blown fuses. without that extra fuse your amp is getting a non limited amount of power from the battery.

Check your fuel injection fuses. If the fuses all look good, replace the ECM. The ECM output drivers to the fuel injectors may no longer be working. I see this alot on these cars.

Since you changed the amperage of the fuses and the cable, you allowed the internal problems of the
amplifier to get worse than they were before the original fuses started blowing.

A fuse is a safety instrument that blows instead of your amplifier.

The problem is NOT the fuses frequently blowing, as such events warn you of internal problems with
the amplifier which you should have had serviced at the time to prevent them getting worse.

It is very much like the persons who replace the fuses in their household wiring with pennies, to prevent
frequent fuse replacement only to have their house burn down from overloaded circuitry.

Service your amplifier immediately.

Revert to the original amperage on all fuses in your vehicle to prevent a car fire.