i have a RM250X which i have fitted a later set of forks to, but as you wish to keep it original contact Nick Dole at Teknik in Sydney, supply him the O.D, the free length and what rate you require and he will set you up with the correct springs. i also had a set of fork emulators left around from another bike,which i fitted. With the standard forks fitted they are definitely too soft both in the spring rate and the oil control. i weigh around 87kg, and the spring rate supplied was .44 For most VMX tracks this set up is quite good, play with your oil height from the std capacity for bottoming resistance.