For the Express 29 MPH is a great speed the express that was designed for 110 lb Japanese people, so it's doing great to haul about 170 lb europeans and a fat
200 lb westerner like me . Green Lawn mower foam did not work on my express and it ran like crap . If you have the stock air box with the metal frame in it your next best step is to call the honda dealer and purchase the stock filter or design your own , the search feature will yield interesting results on this subject . Gas tank rust can be stopped with Kreem gas tank coating . In line filters are a must for these old but really elegant bikes to keep them running in top swarming and destroying form .