Demolition Man wrote:....how bout a 100hp MZ that can reach 150MPH....now thats a DIRT bike!!!! See where I am going....
There is a saying I heard from an old mechanic - If you want a fast car, buy a fast car!
It isn't going to be possible to get 150mph out of a dirt bike - the aerodynamics are all wrong! Even Paris Dakar bikes can't do that! If you want a faster bike, buy a sports bike, or use a totally different engine - I would assume that a TDM engine might fit in an MZ. Its no dafter an idea than doing all that pointless converting.
As far as I'm aware, the whole point of a single cylinder bike is that it has a low rev rate and more tourque than a twin or a multi. It also has less weight. If you start changing flywheels and aiming for a higher rev limit, you will lose touque - so the bike will be more like a two stroke - but still heavier than the compertition - and very unreliable!!
I don't want to be all negative, but sometimes a daft idea needs to be pointed out!
F0ul Oli