[spacebiscuit]

I hope you guys don't mind me posting further questions rather than starting new threads - but 2 cars spin when the wheels are off the track but I put them on the track and they barely move. I have fitted new tyres - one (an xr3i) runs fine if I remove the body - does this suggest the motor is failing - too much weight o push the car? The other car is an f1 type and the motor makes a bit of a noise as it stops. anything else I can try before swapping the engines out?