I'm game. Typically the way a new subforum gets created here is that there are a number of posts in General, that make it pretty clear that a specific subforum for them will improve the experience. If there are only 1 - 2 threads per month on the topic, it can create a subforum that seems quite dead, defeating the purpose.
So if you think it's a topic that would be of interest to folks here, start talking about it. See if others do as well, and see if we can attract new riders on those bikes here (google will find us quickly if we have those new bike titles in the threads). If it hits any level of critical mass, we get ourselves a new subforum.