Cause and engine to work harder. Just watch the heavily laden trucks vs the empty or bob tail tractors. If you are not needing to enter Hwy 5 or do long freeway distances. I wouldn't worry about engine mods at this time. Lots of back roads.. That makes the riding fun!
Check with whatever dealership you intend to purchase the bike from. If they would change out the front fork oil for 15 or 20weight fork oil. Also if they could put on a heavier spring to the rear shock or a complete heavier rear shock unit.
This isn't rocket science and you can easily find your self a decent commuter for
less than $2000.00. I paid $1399.99 assembled and delivered at least to Portland.
Sorry 1st entry didn't show when I went to check on it.