Yes its a car battery off a big diesel. I have an electric motor for reversing, that needs lots of power.Not bad idea that car alternator, but if you have get it work without that then i can too .
I have re-wired reculator + and - to direct to main. Its help lite, its ok if lights is on but when fan start voltages go under 13v... And fan is on about 80% of time. Its kill battery.
Koss ? Its that 500ah normalcar battery or bikebattery? Yamaha R1 orginal is only 10ah so that 500ah is extralarge???
My mini
The bike battery is only good for bikes.
Another option is to have two battery's on a split charge system one for engine and one for the car.
With everything electrical going on my car at the same time it can demand more than 100A.
And you have only R1 orginal generator and no proplemps? If it so, i try Optima battery...