These carbs are really pretty tough. Have you used Sea-Foam or BerryMan's Chem Tech?? Most can be saved with a good soak while still on the bike. TCI's are hard to come by. Can be caught on E-Bay. I got one last month for $2.50. Not going to happen often. And I've paid big bucks for the Ingitech ones. Are they any better? Don't know never used one. Without knowing the bike you are gambling as with anything that old. A lot of help to be had here for only 12 bucks a year. Best deal going anywhere. I would gamble on another one of these old beasts but please don't tell my wife. Buy It We can fix it and it is a great ride!