What makes the Mech Jet an unusual vehicle?

It combines a flying jet with a movable mech arm section, making it suited to both flying and close-combat play scenes.

Which minifigures come with the set?

Set 71707 includes 2 minifigures, including Kai, matching the vehicle's fiery Red colour scheme.

How can you tell it belongs to Prime Empire?

The Trans-Neon Green accent colour is characteristic of the Prime Empire sub-theme and represents its digital game-world setting.

Ninjago

Kai's Mech Jet

Kai's Mech Jet is a 2020 LEGO® Ninjago Prime Empire set that combines a flying jet with a posable mech arm section. Built from 226 pieces, it gives the fire ninja Kai a vehicle suited to both flight and close-quarters play, with 2 minifigures included for direct confrontations. This page lists all 96 unique parts used in the build.

Set number: 71707
Year: 2020
Pieces: 226
Minifigures: 2
Theme: Ninjago
Different parts: 96

What can I build with it?

View the official building instructions at LEGO® ↗

Parts list 96

As BrickLink list (XML)

Import on BrickLink: Wanted → Upload, upload the file (or paste its content), pick a Wanted List and add the parts.

Spare parts (10)

These extra parts come with the set in case one gets lost.

Minifigures 2

Richie - Black Katana Holder fig-0028225 pieces × 1
Kai / Digi Kai with Shoulder Armor fig-0028235 pieces × 1

Description

Two vehicle concepts in one build

The Mech Jet combines a flying jet section with a mech unit featuring movable arms suited to close combat, a pairing that's common across Ninjago vehicles, which rarely function as plain transport alone. That dual design adds more to do during play than a static model of similar size would offer, and at 226 pieces the build stays compact while still fitting in enough moving parts to justify the mech half of its name. It gives a child two distinct play modes from a single model.

Kai and an opponent

Among the 226 pieces are 2 minifigures, including Kai, whose fire element ties naturally to the vehicle's Red colour scheme. The second figure gives the set a built-in opponent for confrontation scenes, which fits the generally action-focused tone of the Prime Empire sub-theme. Small cockpit and grip elements let both figures attach securely to the model rather than simply standing beside it.

A colour scheme between fire and game world

Red and Black form the jet's core colours, echoing Kai's fire element, while White adds contrast around the cockpit and wings. Trans-Neon Green appears as the signature Prime Empire accent on energy or effect pieces, tying the set clearly to the sub-theme's digital game-world setting. That same combination of warm vehicle tones and one bright accent colour turns up across several other sets from this Ninjago wave, making related models easy to spot on a shelf.

Size and collectability

With 96 unique parts out of 226 total, the Mech Jet sits in the mid-range of smaller Ninjago vehicle sets, detailed enough to hold interest without the scale of a full building set. For anyone collecting the Prime Empire wave, it works both as a standalone vehicle and as a complement to other sets from the same year. The parts list above covers every element by colour and quantity for anyone rebuilding it piece by piece.

FAQ

What makes the Mech Jet an unusual vehicle?: It combines a flying jet with a movable mech arm section, making it suited to both flying and close-combat play scenes.
Which minifigures come with the set?: Set 71707 includes 2 minifigures, including Kai, matching the vehicle's fiery Red colour scheme.
How can you tell it belongs to Prime Empire?: The Trans-Neon Green accent colour is characteristic of the Prime Empire sub-theme and represents its digital game-world setting.