Reddit mentions of Berryman 0996 Chem-Dip Carburetor

http://www.amazon.com/Berryman-0996-Chem-Dip-Carburetor-Cleaner/dp/B00DSMEL2A

Try dipping your carb. This stuff worked pretty well for a Solex & and an Edelbrock in my last two project vehicles, managed to make the "go-at-it-with-a-pick-and-brush" phase way easier.

that bike's bearings are likely in great shape, but dry. the original schwinn bearings are better than any modern (chinese) replacements you can buy, other than NOS schwinn parts found on ebay.

i think the biggest problem you're going to have with that particular bike, as a novice, is the brake and derailleur removal, replacement, and adjustment. not impossible, but they can be problematic.

the best way to clean the bearings before repacking them is to soak them overnight or longer in a can of carburetor cleaner. then pack them with actual wheel bearing grease.

schwinn-specific tires are required. tubes are interchangeable, but tires are not.

if he paid $800 for carb dip/clean/setup/etc/. the shop saw him coming.

depends on what "dipped" means.. taking 4 carbs apart and dipping in Berryman's and re-assembly? $150.
https://www.amazon.com/Berryman-Chem-Dip-Carburetor-Cleaner-Basket/dp/B00DSMEL2A

taking apart 4 carbs cleaning and ultrasonically cleaning and replacing everything whether it needs it or not with 4 new carbkits ($50)
$250-$300?

http://www.ebay.com/itm/4-X-CARBURETOR-CARB-REPAIR-REBUILD-KIT-77-HONDA-CB750K-750-FOUR-/322539601700

for $800 , the shop should include a full carb setup/tune and a initial fill of baby tears in all 4 bowls.

yup. I soaked my bell-crank in a can of Chem-Dip until the new cable arrived. Took it out and gave it a good scrubbing, lubed it up, worked like a charm.

There are products specifically for that purpose. Looks like a large paint can, but will say "Carburetor and parts cleaner" or something similar on it and you can find it at any autoparts store. Like this, for example.

Oof.

Your future. It contains this: https://www.amazon.com/Berryman-Products-996-Chem-Dip-Carburetor/dp/B00DSMEL2A

Good luck :)

Depends. If any passages are completely clogged, the Seafoam won't get in to the clog and do its thing. If all passages have some flow, the Seafoam can get in and work.

It also depends on how the gas/Seafoam ratio, and how long you let the Seafoam sit and work. It also depends on how hard the deposits are, and how long they've been there.

I had a Yamaha Maxim 550 (GREAT bike!) whose previous owner let it sit for 11 years with gas in the carbs. Seafoam, Berryman's B-12 Chemtool, ultrasonic cleaning, carb cleaner in a can--none of that worked. What finally worked was a gallon can of carb cleaner, aka a carb dip: http://www.amazon.com/Berryman-0996-Chem-Dip-Carburetor-Cleaner/dp/B00DSMEL2A

https://www.amazon.com/Berryman-0996-Chem-Dip-Carburetor-Cleaner/dp/B00DSMEL2A


Something like this. Your local auto parts store should have something similar.