Motorcycle Repair: Honda CB200T engine stalls., internal passageways, moulthrop

Question
I just bought this bike and have had this problem since I bought it. The bike is intermittantly dying. It always runs good cold but will usually start sputtering and then it will completely die. I can usually start it back up by choking the carbs and sometimes I have to feather the choke to keep it running. It acts like a fuel problem but I'm not convinced. I just rebuilt the carbs and petcock and it ran beautiful right after. It sputtered a bit when it got warmed up but then cleared up. Tonight, I drove it to work about 15 miles with no problem at all. On the way home it died after about one mile, it would start back up and run like crap for a while and die again. Any ideas? Could a coil be faulty? Any help would be greatly appreciated.
Tom Moulthrop
eazystreat@earthlink.net  

Answer
Hi Tom,

The problem you've described is consistant with varnishing of the carbs. When the pilot circuit becomes obstructed with varnish (gummed gasoline) the engine will usually start and idle with choke, but stalls without choke. Choke and pilot circuits share internal passageways. When the pilot circuit becomes obstructed, the choke compensates.

Check your mail for repair information files.

Respectfully,
Mark Shively
mshively1@woh.rr.com