Fork oil is specced from the Honda service manuals to be premium quality ATF(automatic transmission fluid) however, these days motorcycle-specific fork oils have improved drastically and are the go-to when replacing your fluid yearly or during a full fork rebuild. Replacing the fluid with a 10w (lighter rider) or 15w (heavier rider) motorcycle fork oil will help stiffen the front end slightly compared to the factory ATF(approximately 5w).
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Fork Oil Quantities
CB175 / CL175: 135-145cc (4.5-4.8ozs)
SL175: 175-185cc (5.8-6.2ozs)
CB200 / CL200: 128-132cc (4.3-4.5ozs)