Syma Forum

Ok, the simple answer is one gear set isn't moving as fast as the other because something is slowing it down.

I googled Wurth, and from what I saw, and PLEASE correct me where I go wrong, it's a semi-synthetic, almost like a UK version of WD-40. Now, I know WD-40 is alright for plastics, but I do not know about if it's fine for electrical stuff. Some lubricants like that are conductive and may cause issues. If it is conductive and ended up in a motor, then you could have some serious problems, and probably either shorted or fried some coils in it. Also, as SF noted, check for hair, grit, ect. that stuck to the lubricant. That'd slow it down a lot too. The simplest problem could have been that you lubricated one gear set, significantly more than the other, which didn't get as much as it needed. That would slow it down, but I don't know if it would do it to that degree.

One last thing to check now that I think of it, is if you are experiencing gearslip. I know Supernova posted a video in his video section of the forum on it, and that might be of help. If the lubricant was able to squeeze between the gear and into the shaft, where they are held together, then it could be causing it to slip prematurely. They usually don't do this until it's older, and the gear is pulling out of the shaft at the bottom, but if there's something lubricating the joint, where there shouldn't be, then it might cause the issue.