WHITES TIMING PLUG TOOLS HD VTWINThe Whites Timing Plug Tool is the perfect timing tool for use on all Harley Davidson V Twins, simply insert the timing plug into the spark plug hole after removing the spark plug. Makes adjustment of the engine timing a quick and easy job. The extended design is ideal for bikes with an offset primary. The tool marks clearly and accurately without any oil spray at full RPM. Compatible with all Harley Davidson V Twin models Inserts into spark plug hole