My friend and I purchased three Baja 90's youth four wheelers in which my child has may be 10 hours of riding time on it. They all started to loose power when they were riding and eventually shut down, now we purchased these on the 17th of Dec 08, we took them to the shop that Baja had selected for the repairs and they all had blown head gaskets, the manifold was loose and it was leaking oil. When I called a representative from Baja they wouldn't let me speak to a supervisor. She stated that management will call if they feel it is needed. read full review »