The sub interfaces should inherit the mtu. You can verify that by using the extensive option on the interface.
show interface ge-1/1/0 extensive
The l2circuit does also inherit the associated interface mtu unless overridden by the explicit mtu command. But this does require that the path support the larger mtu end to end.
I am confused, you want 9000 but are only setting up the l2circuit with 1530?