Why is there any road bike Cam cylinder available more?

It seems the most fun bikes I have owned were (and are) single-cylinder bikes, or propagandists. the rare opportunity of a new magazine coming out the testers say is the most fun and reminds them why riding a bike. Why then are there so few? And if there are usually a / dirt bike in the street as the DRZ400. I think the wild Suzuki (S40) is the road bike that is not just the funky Buell Blast but I want something modern and sporty, like the SRX600 Yamaha or Honda GB500, perhaps the (not-available) Yamaha MT-03 or the Cafe Derbi Mulhacen. Even BMW discontinued their (strange, expensive) F650CS. What?

I only talk about the Derby that you mentioned. most are two-stroke and if you are in ourselves, then you know that the laws of emissions may be difficult. 100cc two strokes over not really happen in places like Cali. in most people want more than 250cc so you do not have a demand for smaller cc bikes. Personally, I love my gpr 75cc bike. that is the closest we will never a Ducati 916 without the price tag.

California Mountain Biking Road Trip Part 5