kenboon

hello there yammy owners of the world-im kenboon,im new and i got a problem.so here goes- ive been given a yamaha virago xv535 1993 as a gift say, and i aint got much experience when it comes to bikes or the mechanics of a bike.the problem with mine is since i last started it ive noticed that the engine closest the front forks aint warming up nor is its pipe back to the exhaust pipe box,whereas the other one heats up and runs as normal, which leads me to the conclusion the bike is now only running on a single engine of the twin set.also shes cuttin out now even wen warmed up. can anyone add anything to this -the cause of the problem-how to fix it-any info at all much appreciated. cool site by the way.