My suzuki sj50 looses power and putts out?

it sounds like a carburation problem ,more then likely either running weak due to a blocked carb jet or two and or old fuel or even water in the fuel,could also be a broken reed valve petal if its a 2 stroke?i have not heard of this model before are you sure its a suzuki sj50 as honda make a sa50j more commonly known as a vision met-in.how old is it?

adam bike doctor
March 2010