HYPER GO 16401Y Powder Metallurgy Spur Gear with Pinion

About this spur gear

Powder metallurgy gives a tooth that is dense through its section rather than cut from softer stock, and in a brushless sixteenth scale truck that is the difference between a season and a weekend. We sell the pinion with it because replacing a worn spur against an equally worn pinion simply moves the noise. Set the mesh with a strip of paper between the teeth, then tighten — too tight runs hot, too loose strips.

Where it sits in the HYPER GO RC car range

The 16401Y is part of our Drivetrain, Gears & Axles shelf, which carries 6 parts for the MJX HYPER GO range. Model code 16401Y is the number every listing here is keyed to: quote it and the gears, shocks, wheels and bodies that suit this chassis all line up. It is a service part rather than a vehicle, so check the fits row before you order.

Fit and compatibility

This part is listed against the chassis named in its title. Those codes are stamped on the chassis plate under the body; photographs are a poor guide at this scale, because neighbouring versions differ by a couple of millimetres and look identical. If the plate on your car is unreadable, send us a picture with the shell off and we will tell you which version you have.

Living with it

Set gear mesh with a strip of paper between the teeth, tighten, then pull the paper out. Replace shafts in pairs across an axle so the car tracks straight under power.

Specification

Questions about the 16401Y

How do I know this is the right part?

Go by the model code on the chassis plate and the fits row above, not by the photograph. Drivetrain parts differ by a couple of millimetres and look identical in pictures.

Do I need to replace the pinion as well?

If you are replacing a worn spur, yes — they wear as a pair and a fresh gear against a worn pinion will whine and fail again quickly.

Is the differential serviceable?

It is supplied sealed and fitted as a unit. We do not sell the internal gears separately.