I personally think the New LL from novarossi will destroy the OS on a long track.


Its a twin of the mugen x-12, both are long strokes.

The LL has fixed the dreaded fuel economy problem the x-12 has and is a little faster in general.

The NSR is an engine for technical tracks, it has a lot of low end but the LL or X-12 will pull harder on the mid range and top end.

The OS is a good engine for the money but if money isnt an issue, i'd take the LL, there is also a LL mod version at nitrohouse for $350, its a basic mod.