I'm inclined to agree with wbbnm. I've owned a 62S for the past 2 years, use it frequently, not for motorcycle navigation but for bush fieldwork. It's a very capable machine for my purposes, hasn't let me down yet.
It sounds like the OP needs to follow a GPS course or get some lessons from someone experienced. Also, he could've saved a fair penny by just getting the S and buying the maps separately, and a 5MP camera on a GPS is, in my opinion, nonsense.