I new riding 4 strokes. Im riding 2 strokes for 15 years. When I riding in sliperry dirt its very dificult to move foward. In 2smoke i put a little throttle and the bike move foward with the engine dead. I cant dead my engine with out stall the bike. The bike mod. fmf fact.4 exhaust gray cable stock,jett stock. In dry trail the bike run perfect. Please any help. I need traction. thanks. (sorry for my english) Im a talented rider 2002 gncc winner vet b class.