G'day all! I'm a 35yo rider from Darwin and my daily commuter my Yamaha XVS250 2006 has been having some rev issues lately. I've had this bike for a while now and makes a great cheap commuter. When I first got it it would quite happily sit on between 110-120kms all day without an issue. In the last month to 1 1/2 months it gets to 100 km/h and within a few minutes it starts to struggle, like it's struggling to get enough fuel or it's being choked. Once it starts struggling the only way to make it stop is to pull the bike over, at which point it stalls then re-start it. On re-starting it, it struggles for 5-10 seconds then it's back to normal. I have had several mechanic look at it, have replaced the manifold/carburettor joint (under the carbie) as the old one had cracks in the rubber. I'm thinking there may be a air leak in the carbi, such as a missing O-ring. The jets have been cleaned several times and this has no effect on fixing the issue?! Has anybody else had a similar issue?! Would love some help if you might know what the problem might be.