HYPER GO P12YSA02 Right Front Portal Axle Assembly

About this spur gear

A portal axle puts the output above the centre of the wheel, which buys ground clearance without a taller tyre, and it is the reason the twelfth scale cars climb the way they do. It is also the part that takes the hit when a front wheel finds a kerb. We supply it assembled and handed, so check which side you need: this is the right front.

Where it sits in the HYPER GO RC car range

The P12YSA02 is part of our Drivetrain, Gears & Axles shelf, which carries 6 parts for the MJX HYPER GO range. Model code P12YSA02 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 H12Y, H12P. 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 P12YSA02

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.