I wish the NS engine was as good as the NSR250.... as I've got an RGV with an NS400 engine - with a 500 conversion it goes up to about 75bhp! There are no powervalves, no crankcase reeds, crappy transfers etc etc.

So I am seriously considering adapting the NS engine to fit different barrels along the 'Ralf Kras' lines.... Then much more modern barrels could be fitted, with crankcase reeds, and much higher horsepower.

Mat.