If one tinkers a little with the fuel tank (adding nitromethane and nitroglycerol into it) the motorcycle engine is sure to blow up, and if it was a lot of these additives, then it will blow up real well, igniting and detonating the fuel tank. And no helicopters or anything else needed.
When is Al-Sadr going to resemble a 'boston butt' left in the smoker too long?