hi all i think my merv has a problem ive ran my car and maintaned it well until suddenly my merv has lost its go it doesnt go very fast anymore and its topspeed has been shortened dramatically. i know its not the batteries cos ive got four (using series connector)and its going the same with both. My wheels and tyres were shot so ive bought some dirthog tyres on prolines ans renewed all the hollow balls (needed replacing) and its still the same. Ive also adjusted the slipper clutch in and out and that hasnt done anything either. Ive ordered a new clutch just in case. Can anyone help me?