i have a 2001 raptor and supposedly the owner before the owner that i bought it from got engine work. so now when i ride it but i get on it it smokes blue. it only does it when i rev it up high and then when it is revving down it smokes. other than that just normal riding it does not smoke! does anyone know what is wrong????!? thanx

 

Blue smoke usually means oil, a compression check would be my first action.