[glhonda]

Not familiar with the 1000, a couple things come to mind though.

Did you do a bench sync and verify throttle plates were working together correctly before install or possible linkage problem being installed backwards, upside down etc.

At this point, this is about the simplest thing you can do.
Remove the intake tubes and see where your throttle plates are at rest. Check for one more open than the rest. The plates should appear very nearly closed. Ten minute visual inspection.

 

[glhonda]

The fuel travels through the plenum halves on the 1000. Did you replace the gasket or separate the plenum?