You would need to define $PATH in your ~/.bashrc file on target server, at the beginning of the file :
export PATH=$PATH:/home/user/bin
http://stackoverflow.com/questions/940533/how-do-i-set-path-such-that-ssh-userhost-command-workshttps://stackoverflow.com/questions/940533/how-do-i-set-path-such-that-ssh-userhost-command-works :
Bash in non-interactive mode reads the file ~/.bashrc