To be fair if you really wanted the RS250 power either get an RS250 NF5 engine (shares crankcases with NSR range) or go buy an RS250 NX5 (single sided swinger model) and fit lights. Here in the UK you can pick up an early NX5 for about the same price as a decent MC28. The NX5 has so much better kit , but of course needs a top end rebuild every 150 miles....or could be kms. and a new crank every 1000miles (or kms).