You can attempt to use sorbo on the cylinder head. I have seen it before.
1.) 156A MOSFET with 500 Watt TVS Diode-$15
2.) 156A MOSFET with 500 Watt TVS Diode and 30A Self Resetting Fuse-$18-Out of stock
3.) 156A MOSFET with Active Braking-$20-Out of stock
Shipping cost will be $3
Feel free to message me if you are interested.