Hinckley Radio Control Car Club

also to charge my batterys up i cant remember what amp to charge them at

ive oiled it and loosened the nut it doesnt seem to make a difference and the radio set seems to just speed it up or slow it down the faster i go the more it turns right

i have a mardave v12 and its been put away for a while but recently got it out and now its slightly turning to the right was perfect when i put it away how do i fix this im still at beginner level so if you know anything that will help comment please but not too scientific lol thanks would be a grea...