Bakuon RettouDetonation Islands, Sonic Boom Islands

From Manga Updates: Kazei Takeshi moved with his parents to a new house and new school. One of his new friends is a motorcycle enthusiast and soon invites him to meet with his gang, the Zeros. Takashi comes to love motorcycles and soon gets involved in the gang's fights and issues. What has he gotten himself into and is he ready to face the consequences? From Baka-Updates: In the 80s, Kaze Takashi's parents moved to a quiet area in Tokyo to protect the young child from the bad influence of his friends. In class, Takashi doesn't wait to make new friends. Passionate for motorcycle rallies, they invite Takashi to join the next event. It became a revelation for the young man and he decides to join a biker gang! Now all that's left is to find a motorbike...