Ok, so "Motorhead" does not really have a song entitled "Sparkplug Soul"; they should have. It fits them.
If they did, I think it would go something like this;
"I wish I had a sparkplug soul,
to go along with my rocker-armed mind.
I wish I had a sparkplug soul,
to lay down some tread on some weary bones.
With a sparkplug soul,
I'd fire every piston.
I'd slam them into my rocker-armed mind.
Electric blast feeling the gaseous sqeeze
in my spark-chamber brain.
With my sparkplug soul,
synapse they fire,
and my crankshaft legs,
they fly, baby, they fly.
Oh how I loves my sparkplug soul.
Ram it home, baby.
Fire me up another spark.
My sparkplug soul.