Thunder Number

The Thunder Number サンダー号 (Sandā-gō) is Rai Kotaru's personal motorcycle which first appeared in episode 1 of the tokusatsu  series, Warrior of Light Diamond Eye titled My Name is Diamond Eye.

Warrior of Light Diamond Eye
The Thunder Number is Rai Kotaru's favored motorcycle which he utilizes both in travel and combat.

Trivia

 * The Thunder Number's Japanese name, Sandā-gō, is very similar to the name of  Sanda.
 * Similarly, the Thunder Number's name is also close to that of its primary user, Rai Kotaru. Rai's first name literally translates to thunder.