If you are like me, and work on bikes all the time this stuff will be a good investment. You can use it to clean carbs, take off paint, clean brakes and brake parts, and even unfoul plugs. A friend of mine refuses to rejet his bike a fouls a plug on every trip, so it would be easy for him to take a few of the nine-thousand plugs he fouled and drop them in that cleaner for an hour so that he does not have to buy a new plug every trip. I just recomended this stuff because it has a lot of uses, and is worth the money for most of us. Never fouled a plug, i guess you have never crashed either huh. If you had you would have fouled at least one plug. I foul plugs riding on trails pulling a tall gear, if i kept it wound out it probly would not foul them often. Even with my riding style i only foul one after about 20 hours of riding.