New WURTH Valve Adjustment Feeler Gauge Set For BMW Airhead Motorcycles These are the same, high quality WURTH feeler gauges sold by BMW motorcycle dealers and used in their service centers. BMW gets $6.65 to $8.59 EACH for the same feeler gauge. Buy the whole set here and save money! We'll even include free shipping within the USA! This 3 piece set includes: 1 x .10mm Feeler Gauge 1 x .20mm Feeler Gauge 1 x .15mm Feeler Gauge Depending on which service manual you use; BMW, Clymer, Haynes, etc... (or your preference), your intake valve clearance will either be .10mm or .15mm and exhaust .20mm. We include all 3 feeler gauges to do the job right! Always verify your valve clearance specifications in your service manual.