RCCrawler Forums

AK KRAWLER

So, I purchased a little, used Yeti Jr from a member here and this thing looks like it’ll be a blast. It is in really good shape and already has a 4100kv Brushless Mamba Motor and Mamba Micro X installed.

A couple small issues and most of it was me not researching enough before I “had” to have it. In typical fashion, I bought it and immediately put it up on a shelf for a couple months, while I worked on other projects.

I pulled her down the other day, only to find out it mad a nasty grinding noise when it was pushed around and while trying to drive it. No worries, it’s a tiny little rig and there is not much to go wrong…
I first thought the front did was stripped. I tore into it, only to see that everything looked good. Put it back together and the noise was still there. Okay, it still has the open diff front end and I think it was just wore out. I believe the spider gears were slipping due to excessive slop in the diff itself. I cleaned it all up and did the JB Weld DIY locker. That took care of that issue and the diff is now quiet.

Now, onto the current issue.

The little Mamba motor has a tiny 2mm shaft and the tiny 10 tooth pinion was loose on the motor shaft. This little guy has the small grub screw I have ever seen… it makes the tip on my 0.050” hex driver look big. With some research, it looks like this may need a 1mm hex driver.


Well, no one around here has this little of a hex driver, so I’m a bit dead in the water for now. I checked the only hobby shop we have, as well as all the hardware stores, big box stores and auto part stores.

Here she is.






In tear down.