Unless Honda changed from 90-91, it's on the firewall behind the distributor.

The tricky part is loosening the banjo bolt that connects fuel outlet and tubing connection for inlet fuel line. On my 90 EX they were extremely tight. There is a boss on the filter that you can use to engage an open end wrench to hold the filter cannister while you break the banjo bolt w/ a ratchet. The firewall mount will not hold the torque required to break the banjo, so don't try w/o a holding wrench.

The inlet tubing connection is also very tight. A tubing wrench is best tool, but a good vise grip will do the job w/ minimal damage to the nut. If you try an open end 10mm wrench, you may round off the nut. Again hold the cannister w/ wrench on the boss lug at the top of the cannister.

I seriously doubt this will make any difference, but it's relatively cheap for the filter, and as long as you're careful will do no harm.

East Coast Honda Manuals

Check following link for a manual w/ procedure:



good luck