Re: 1974 cl125 (olive and plaid)
hey there and good on ye for deciding to keep a classic classic.
if it is not too late to lend a hand with tank cleaning. i had brown water loud tank (rust) after lots of attempts, nuts and bolts, rinsing, wd40, muriatic acid, over and over and over.
what works on STEEL and not ALUMINUM is dollar store "the works " toilet bowl cleaner!! it has the highest concentration of some wicked dangerous chemical ever in it. and my tank came out completely spotless after using it 100 percent strength, soaking an hour, then adding water to fill, 5 min, and dump it all down the toilet, then i just mixed a little baking soda, in water and switched it around to neutralize the acid, water to get out the baking soda, then dry with towel or hair dryer (both) and fog it with wd40 or motor oil or trans fluid, whatever is on hand to protect. or if you are ready you can fill it with gas to keep the flash rust from returning.
two most important things to do ! do not do this at all if you have an aluminum cap, tank or petcock take them of and wait until dry before replacing them on the tank. if not then at the end you will have a puddle of metal and likely a good size acid burn from the leak, this stuff eats aluminum, 2 the baking soda and oil to protect are crucial don't do them and in minutes you will have black oxidization and have to re rinse or start over 3 BE CARE-full and do this as if you were using a powerful chemical to dissolve metal because you are!!!!
for more reading i saw a long post about tank cleaning on sohc4
sorry to runaway with this post but i am gonna add this to the 50 mod section and i was so frustrated with other methods and shitty results that i got a little ranty. OVER