Savage Help

Hello, I would like to know if someone can help me. I have a Savage 650 model 98 and with 7000 km. I bought it at 6000 km. Recently, it would lead her to make her a carburea because she stopped when she was slowed and failed. I improve after the mechanic looked at it, but I warn that I have an admission valve that is blown, he says he does not close at all and for that reason he sometimes comes out fuel and reaches the air filter. I would like to know if I can corroborate it to know if I really have to change the valve or work is being generated. It happens that I find it strange for a motorcycle with so few kilometers. Thank you very much.

Pucha friend without seeing is difficult to say, but if there is an admission valve under the conditions that your mechanic tells you, if this effect occurs,