bounce

Hello again, Third and final question. I knew before buying the bike that the housing for the indicator light, sorry don't know the parts name, just above the carbon fiber cover for the air box was replaced as it was newer than the surrounding parts and a fellow Vmax rider pointed this...

I just put on a new set of tires and I have noticed that at 60mph and then again at 80mph the tire starts to bounce terribly. I have to slow down ( can't get to 140mph) What could cause this. Bad tire? The shop that I bought the tires from said it could be the front forks. Need rebuilt? What are...