my mhrx with some exuaste metrakit... plz help me tell what's it is it's not an Rk or sp it's no way like that plz help it's and olderversion that isen't for sale nowadays. anyhow not it's kitted with Doppler competiton cranshaft Polini Evo 80cc (max hk/12500rpm) 21mm doppler carburator 15/48 sprokets new tires (metzler back and pireli front)