Hello, I have this odd behaviour occuring with my Yamaha XV400. It intermittently loses power at speeds over 80km/hr. Typically, it struggles a little sometimes when I reach 80-ish and then picks up again. I can then cruise about at 100-110 happily, but will then lose power again back down to 80km/hr and even at full throttle won't be able to accellerate any higher. What kind of issues could cause these symptons? Possibly a pinched fuel line, clogged fuel filter, or something similar? Any pointers would be great! Thanks in advance. Cheers; -Andre.