Join Date: Sep 2004
Location: Medford, County of Jackson, Oregon, USA
Model: None at present
If you wonder about the K&N filter, you could hook up a vacuum gauge and then with the engine running around 3000rpm, open the airbox over the filter and see how much change if any you got. If the vacuum dropped a couple inches of mercury it would indicate the filter is restricting the airflow.
None at present
Past 'Wings: GL1100, GL1200, GL1500, GL1800
Current BMW C650GT