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Removing hard water sports on Engine + Pipe

3.8K views 14 replies 9 participants last post by  BigJimmyB  
#1 ·
Hello guys!

Last week I came home to a really intense rain, bike got soaked wet (just as me) and after cleaning I found that several water marks were all around the exhaust pipe and some parts of the engine.

What would be the recommended way to remove them considering the black & matte finish of the bike? So far I have read of 3 "common" recomendations, but I'm not completely sure on which one to use:

1.- S100 Cleaner
2.- Vinegar
3.- WD40


I have also read about polishing but that doesn't seem to apply to the exhaust pipe or the engine case (luckily, there are no spots on the tank which has a matte finish).

Anyone care to share their experiences with these water sports?
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#4 ·
Water is a great solvent. Reverse Osmosis water is an even better solvent because it is basically just the "H" and the "O". RO water will dissolve the calcium deposited on your pipes when the heat evaporated the rain water.
The longer you leave the calcium spots on your black finish being heated-cooled-heated the more permanent the spots will become just like hard water will etch spots in glass..
 
#11 ·
Tub o towels. I used it on chrome and on the tank & fenders on my Harley. It take bugs off like crazy. Works very well and doesn't hurt the paint. I waxed the painted parts after. The Harley was my guinea pig before I used it on my Triumph. I don't use it on the windshield.
 
#14 ·
Depending on how hard the minerals are in the water spots and how long they have been on the bike you can try:

1. saturate a microfiber or similar cloth with regular tap water, rub the area well, then dry and buff with a clean towel. This simple trick can remove some light water spots.
2. White vinegar and distilled water. 50/50 or more water than vinegar if you like. I have had success with removing spotting on car paint this way.
3. Soak a cloth with Windex, let it sit on the area for 10-15 minutes and wipe. This works sometimes too depending on how bad the spotting is.
4. The original biker's detail product/cure all - Pledge. Yes, pledge. I have kept cans in the garage for decades.

You can try the water spot remover products off the shelf but I have not had any success with those (Meguiar's, etc.). There are more aggressive methods but I don't recommend these unless you are familiar with chemicals and cleaning compounds. Such as diluting acidic wheel cleaning solutions a certain way which works for removing hard water stains but if not done right it can ruin the finish.