My Yamaha sr250 has developed this problem, I'm guessing it is either fuel related or electrical. In the high rev range the bike seems to miss a beat, its best describe as a small shudder. If I stay in this rev range it can be constant or it can be intermittent. Not too dramatic, but definitely noticeable. The two ideas I have; - Bad or blocked fuel path. - Some electrical issue, a bad contact somewhere. What do you think? Any suggestions?