Ordered a service kit from motorworks and has come with air filter, oil filter, fuel filter, fuel pump sealing ring, fuel filter hose clamps, two spark plugs but only 3 crush washers. One for fd fill, one for fd drain and one for gb fill. Looking on the parts microfiche there isn't one for gb drain but there is one for the engine drain shown as 16x20. Looking on motor works website they also list a crush washer set which has 5 washers in presumably for each plug. Which is right and do I need to contact them about the missing engine drain (sump) washer? Oh it's an 1150 gs on a 2001 single spark model. Cheers.