Ive had a pair of Keihin CR33's for a while now and have finally decided to fit them. The previous owner let the bike sit with fuel in the carbs for a while so the jets are a bit manky but not too bad. I was going to leave them alone but noticed something in Motorcycle Mechanics about using Tomato Ketchup. I squirted some kethchup through the jets and then left them in a bowl of ketchup for a couple of days. I cleaned them off this morning and hey presto some very shiny jets.
