I have had this bike for a long time, but it has sat quite a bit since I had kids. I want to start riding again, but I have a carb issue. The carb leaks gas like crazy. Apprears it comes out from the bowl gasket, not sure. Several years ago, I took it apart and cleaned up up real good, even filled it with water, to see if it would leak. Seemed like I fixed it, until I remounted it (after the water dried, of course). Still leaks. What are my options? I read a few threads and it sounds like the carbs are junk anyways. Parts are hard to find, etc. Is there a direct replacement I can buy? How much more would it cost to upgrade to a 450 carb? Thanks in advance for the help.