Paddy is out for a ride on his vintage single when it just quit running. He can't get it going. He hears a voice behind him "change the spark plug!". Looking behind him he sees a brown horse. He ignores the voice and continues to trouble shoot. Again he hears "change the spark plug!" Turning around all he sees in a brown horse. So, Paddy changes the spark plug and the bike starts and runs fine! Paddy is now quite confused so he rides to the nearest pub and orders a triple whisky. Seeing the look on Paddy's face the bar tender asks him what's going on. Paddy describes his encounter with the horse. The bat tender asks Paddy what colour the talking horse was. Brown says Paddy. Ah, says the bartender, good thing it wasn't the white one, he doesn't know #$%* about motorcycles!