My '04 R1150R Rockster is experiencing an issue I have been unable to resolve. After stopping for fuel or a short break upon startup the bike runs badly, won't idle and has little power. After a 1/4 mile or so it takes off and all is good again until the next fuel stop/break. If it was old school carbed I would compare it to vapor lock---but it is new school has no canister, it has a z tecknic y-pipe and muffler, all o2 sensors are hooked up. Other than this issue the bike runs well, gets fuel mileage in the mid 40's and has no other issues. I bought the bike in Tennesee and flew in and rode it home to Tucson, the po was on his way to Alaska for a new job and is out of touch so past history is unavailable. Ideas anyone??