Suzuki Intruder VL1500B Owner's Manual page 109

2. Unhook the hooks and pull off the cover.
3. Pull off the spark plug caps.
4. Remove the spark plugs with a spark
plug wrench.
SPARK PLUG INSPECTION
Readjust the spark plug gap to 0.8 – 0.9 mm
(0.031 – 0.035 in) with a spark plug gap
thickness gauge. The spark plug should be
replaced every 12000 km (7500 miles).
6-27
0.8 – 0.9 mm
(0.031 – 0.035 in)