Ok so I think i figured out what my problem is we think i blew a head gasket checked the compression today and it only has 60 psi so I am purchasing a gasket kit piston and rings new vforce reeds and some other small stuff like a clymers manual I am also thinking my shifting issue has to do with my sproket change not the back but the from when i had the 12 tooth front and 45 rear it shifted fine so I am going to switch back to the the 12 and keep the 50 rear and hope that fix's it otherwise i will just switch both back they are still in good shape just figured when i bought the new chain i would try something new by the way my 13 front and 50 rear is stock so i don't understand why it could be the problem but that's the only change in that area.