Hi CJay.
The Greenies are a tough machine and will last you a very long time with minimal maintenance. Worst case is throw another motor on them and good for years to come. Front axel beam just needs to rock to keep the front wheels on the ground. I replaced the king pin bushes in one years ago, can't remember if I was able to get new bushes or I made new ones out of Delrin. Either way they are well worth maintaining because they will give great service
