I am a professional mechanic and own my own automotive shop. I bought this kit for my 1989 GSXR 750 fuel tank. It worked perfectly. I followed the instructions to the 'T'. However I used straight muratic acid instead of the diluted acid. My tank was heavily rusted and the diluted acid did not work. after all the rust was gone the rest of the kit worked perfectly. This is one of the best and reasonably priced kits on the market. Thank you.