2003 Suzuki LT-Z400 Factory Service Manual, Page 20Get this manual

2003 Suzuki LT-Z400 Factory Service Manual, Page 20

Standard GR7E U20ESR-N U22ESR-N CARBON DEPOSITS Check to see if there are carbon deposits on the carbon is deposited, remove
mm (0.0280.031 in) 09900-20803: Thickness gauge Check the condition If the electrode is the electrode, worn or burnt, replace
the spark if it has broken Check the thread size and reach when """M,I"plugIf the reach is too short, carbon will be deposited