I'm not familiar with your bike, but suspect that filter may be aftermarket. Some 'operations' on our bikes are really important, like carb adjustment, torque values, Loctite use, pushrod installation sequences, etc. this is not one of those. This is a just a vent, and only needs to be open to the atmosphere. The filter is used to catch any oil droplets instead of spraying them on the back of your bike or dripping on your garage floor. Try one of these: 1. Measure hose on your bike--order that size filter. 2. Buy both filters and return the one you don't need. (I always keep 'em figuring I'll need it sometime) 3. Clean yours and re-use it. 4. Route the hose straight down and don't worry about the filter. 5. If your new filter is the wrong size, make an adapter out of some copper or plastic tubing (and rubber hose) and use it anyway.