hi any one got a tamiya xbg nitro? i need help with mine !!! the car is only a few months old and run in at last i have been very carfull with running in and maintenence ,but now i have a loud noise when ever i start the motor,and the pull start seems notchy!! with the pull starter off the engine rotates freely with no noise ,i darnt strip the pull starter down through fear of not being able to put it back together again , has any one had theres to bits b4 ??can anyone advise me ?