Honda-SOHC

Think these type of tyres are referred to as ditch finders 

Is that Noel Edmonds on the front cover 

http://blacksquaremotorcycle.com/electrical-system/

http://motorcyclemd.com/how-to-fully-troubleshoot-your-motorcycles-charging-system/

To check the stator measure any 2 yellow wires resistance, should be fairly low ohms (bike not running)
Any yellow wire to ground should measure open circuit.

Bike running, any 2 yellow wires, AC volts around 20v upwards depending on engine speed.
If the meter reads a few milli volts AC on any 2 yellow wires the stator is working, the exciter coil is not, check the voltage (DC this time) to the exciter coil, between white and green wires or white to ground. (this was on my 550 so colours may be different)

I was convinced for ages my stator was faulty on mine, turned out to be a break in the wiring to the exciter coil.

There is a tank on eBay at the moment.

My head gasket is weeping oil and getting worse although the bike still pulls like a train.

Where is the best place to get from, any makes to avoid?

Could i get away with just changing head gasket or will removing the head disturb the base gasket?

Thanks.

I just replaced the fork oil in mine, made a huge difference.

Sent you a PM