I'm just starting out and looking for a bike to learn on. I just took a 91 ZX-6 for a test ride. It idle perfect, and was great running through the RPMs but then started to sputter, then stalled ... almost like it was out of gas. It wouldn't start back up right away. I let it sit for 2-3 minutes and it started no problem, but then 5 minutes down the road it did the exact same thing. Let is sit ... then drove back. The fuel guage was 1/4 full. I tried putting it on reserve after the first stall just incase. Any ideas if this would be an easy fix or what could cause this? He had the carbs rebuilt last year (by a professional shop) The guy is asking $1300 for it. Sound resonable? It's a little rough looking (scratches, torn seat).