Well the front hub is done. The freewheel is off. Grease is pretty caked up and kina dry in both. Bearings did not look bad, bur for 5 cents apiece, got new ones. Standard "solvent" for cars and parts is called brake cleaner. I used it to clean out the hubs because they are completely apart, but I am not taking apart the freewheel. There is significant junk caked on the cogs of the freewheel and derailleur. I am hesitant to spry this istuff on them as I am not taking them apart and it dissolved grease. What is the best way to clean these? I am guessing that these are lubricated and I am hesitant to use this or water.