Virago squirts

Hello We have bought a Virago now.EZ is 95 km stand 20000.The test drive went perfectly, except for some traces of use the bike is ok.After the re-registration I wanted to take a small exit and stated the following: After the cold start it squealed from the exhaust about 1 to 2 minutes, after that it was normal.At the speed of more than 100 kmh the machine starts to jerk as if there is a speed limiter installed.