How many pieces are in the Kai Fighter?

Kai Fighter contains 196 pieces.

What age is the Kai Fighter recommended for?

This set is recommended for ages 8-14.

When was the Kai Fighter released?

Kai Fighter was released in 2014.

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🏛 Ninjago

Set #70721

Kai Fighter

The Kai Fighter is a fantastic little Ninjago set that packs a punch.

Before you buy

Who it's for: Ages 8+ · Beginner build Ideal for younger Ninjago fans and those looking for a quick, enjoyable build experience.
Build: 196 pieces · about 1.5 hours Build time is an estimate.
Price: $19.99 list price · 10.2¢ per piece
Availability: Retired at LEGO

★★★★☆ 4.0 community rating from 188 ratings

Fans appreciate the Kai Fighter's sleek design and the inclusion of General Cryptor, a unique minifigure. Some find the build relatively simple, but overall it's considered a solid and enjoyable set for Ninjago enthusiasts.

$19.99

Best Price

$17.99

You Save

10% OFF

📝 Our Take

AI-assisted editorial summary, grounded in our LEGO database and public community discussions. How we use AI

The Kai Fighter is a fantastic little Ninjago set that packs a punch. Released in 2014 as part of the Rebooted theme, it offers a sleek design and two great minifigures at an affordable price point.

This set is perfect for Ninjago fans of all ages, especially those looking for a quick and satisfying build. The small size makes it ideal for display, and the play features add to the fun for younger builders.

Skip this if you're only interested in large, complex builds or have already collected most of the Rebooted Ninjago sets. Consider the larger Ninjago vehicles like the Ultra Sonic Raider (70505-1) for a more involved experience.

✨ New

Ask BlockTalk about this set

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Hi! I'm BlockTalk, your LEGO expert. Ask me anything about the Kai Fighter - building tips, investment potential, comparisons, or anything else!

Try asking:

How does the Kai Fighter compare to other Ninjago vehicles in terms of design and playability? What are some creative ways to display the Kai Fighter? Is this set a good value for its current price on the secondary market? How rare are the minifigures included in this set?

🧱 Building Experience

AI-assisted build estimate, grounded in our LEGO database and public community discussions. How we use AI

🧩

196

Pieces

⏱

1.5h

Estimated Build Time

📊

Beginner

Difficulty

👤

8-14

Ages

Build Highlights:

Simple but effective building techniques create a swooshable fighter jet.
Clever use of angled plates to achieve the sleek design.
Fun play features including flick missiles.
Easy to display on a shelf or desk.

📈 Investment Analysis

AI-assisted investment analysis, grounded in our LEGO database and public community discussions. How we use AI

↑ Trending up since release

Investment Grade

⏳ Retired

The Kai Fighter (70721-1) presents a moderate investment opportunity. As a retired Ninjago set from 2014, it benefits from the theme's enduring popularity and the set's relatively low original MSRP. The inclusion of two minifigures, including the General Cryptor, adds to its appeal. However, its small piece count may limit significant appreciation compared to larger, more complex sets. The rising price trend suggests growing demand, but potential investors should be mindful of market fluctuations and storage costs.

Not Financial Advice: Content is for educational purposes only. Past performance doesn't guarantee future results. Full disclaimer

📖 About This Set

Take on General Cryptor with the red-hot Kai Fighter!

Kai has taken over a civilian vehicle and used his Techno-Blade to turn it into an awesome red and gold Ninja Fighter! Take off and weave between the skyscrapers of New Ninjago City with Kai in the cockpit. Shoot the gold-tipped flick missiles into the path of the evil General Cryptor and evade blasts from his ground-to-air laser rocket launcher. Defeat General Cryptor then flip the wings back to engage speed mode and zoom away. Includes 2 minifigures with weapons and an accessory: Kai and General Cryptor.

Includes 2 minifigures with weapons and an accessory: Kai and General Cryptor with armor
Features 2 gold-tipped flick missiles, speed mode adjustable wings, wing blades, 2 powerful side jet engines and cockpit with space for a minifigure
Weapons include exclusive translucent red Techno-Blade, 2 swords and laser rocket launcher
Also includes special armor for General Cryptor
Fire the gold-tipped flick missiles
Flip the wings into speed mode to accelerate away from Nindroid attacks
Grab the red Techno-Blade from General Cryptor and save New Ninjago City
Measures over 4” (12cm) high, 10” (26cm) long and 13” (34cm) wide

⚖ Compare Similar Sets

The Kai Fighter is a smaller, more affordable alternative to larger Ninjago vehicles like the Destiny's Bounty (70738-1) or the Ninja DB X (70750-1). While it lacks the complexity and piece count of those sets, it offers a more accessible entry point for younger fans or collectors on a budget. Its compact size also makes it easier to display.

2 Minifigures Included

Kai (Rebooted)

5 parts

General Cryptor (Rebooted)

5 parts

B+

The set includes two minifigures: Kai (Rebooted) and the exclusive General Cryptor, making it desirable for minifigure collectors.

📦 Parts Inventory

Official piece count: 196
Parts cataloged in this inventory: 74 unique parts, 186 pieces
Minifigures: 2

The official piece count includes the 10 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Missing a piece? Check this set piece by piece, with look-alike colors flagged and element IDs for replacements.

Tile Special 2 x ...

Part #: 11203 2× Dark Bluish Gray

Brick Special 1 x...

Part #: 11211 5× Red

Plate Special 1 x...

Part #: 11458 2× Dark Bluish Gray

Brick Curved 2 x ...

Part #: 11477 2× Black

Brick Wedged, Slo...

Part #: 13349 1× Black

Brick Curved 10 x...

Part #: 13731 2× Red

Weapon Axe Blade,...

Part #: 15621 1× Trans-Red

Sticker Sheet for...

Part #: 16050 1× [No Color/Any Color]

Tile Special 1 x ...

Part #: 2412b 3× Pearl Gold

Plate 2 x 2 Corner

Part #: 2420 2× Red

Wedge Plate 3 x 3...

Part #: 2450 4× Black

Brick Special 1 x...

Part #: 2653 2× Black

Brick Special 1 x...

Part #: 2921 2× Light Bluish Gray

Part #: 30173b 2× Flat Silver

Plate 2 x 4

Part #: 3020 4× Black

Part #: 3022 2× Yellow

Plate 1 x 2

Part #: 3023 9× Green

Plate 1 x 2

Part #: 3023 4× Red

Plate 1 x 1

Part #: 3024 2× Black

Plate 4 x 6

Part #: 3032 1× Black

Brick Round 2 x 2...

Part #: 30367b 1× Black

Bar 4L (Lightsabe...

Part #: 30374 2× Black

Brick Sloped 45° ...

Part #: 3039 1× Black

Part #: 3068b 2× Black

Plate Special 3 x...

Part #: 3176 2× Light Bluish Gray

Plate Special 1 x...

Part #: 32028 4× Light Bluish Gray

Technic Brick 1 x...

Part #: 32064a 1× White

Part #: 3660 6× Black

Plate 1 x 6

Part #: 3666 4× Red

Turntable 2 x 2 P...

Part #: 3679 2× Light Bluish Gray

Turntable 2 x 2 P...

Part #: 3680 2× Black

Part #: 3794b 2× Black

Part #: 4282 1× Black

Wedge Plate 12 x ...

Part #: 47397 1× Black

Wedge Plate 12 x ...

Part #: 47398 1× Black

Part #: 54383 1× Black

Wedge Plate 6 x 3...

Part #: 54384 1× Black

Cone 1 x 1 [Top G...

Part #: 59900 1× Trans-Red

Cone 1 x 1 [Top G...

Part #: 59900 2× Pearl Gold

Plate Special 1 x...

Part #: 60470b 6× Red

Part #: 60602 2× Trans-Clear

Technic Pin 1/2 w...

Part #: 61184 3× Light Bluish Gray

Hinge Brick 2 x 2...

Part #: 6134 2× Black

Plate Round 1 x 1...

Part #: 6141 6× Pearl Gold

Turntable 4 x 4 S...

Part #: 61485 2× Black

Tail Shuttle

Part #: 6239 2× Red

Equipment Telesco...

Part #: 64644 1× Pearl Gold

Tile 1 x 6 with G...

Part #: 6636 2× Dark Bluish Gray

Brick Sloped Inve...

Part #: 72454 1× Black

Brick Sloped 30° ...

Part #: 85984 1× Dark Bluish Gray

Tile 2 x 4 with G...

Part #: 87079 6× Red

Technic Axle 4 wi...

Part #: 87083 1× Dark Bluish Gray

Cylinder 1 x 5 1/...

Part #: 87617 1× Black

Plate Special 1 x...

Part #: 92280 2× Black

Windscreen 8 x 4 ...

Part #: 92579 1× Trans-Brown

Brick Sloped 45° ...

Part #: 92946 4× Black

Weapon Sword, Big...

Part #: 98137 4× Pearl Gold

Bracket 1 x 2 - 2...

Part #: 99207 1× Red

The set provides a good selection of red and black plates and slopes, useful for building vehicles and other Ninjago-themed creations.

Community Insights

Real opinions from Reddit and YouTube

What Reddit Says

No Reddit discussions found for this set.

What YouTubers Say

1 video found

BlockTalk AI

The LEGO Ninjago Kai Fighter (70721) receives mixed reviews, with an overall sentiment score of 3.4/5. While reviewers like BricksNerd appreciate the solid build and cool design, particularly the adjustable wings, the overall reception is neutral, with few strong opinions expressed beyond the build quality.

LEGO Ninjago Kai Fighter 70721 Review Unboxing

BricksNerd • 42.0K views Review

What the Community Says

1 YouTube reviews

BlockTalk AI Summary

BricksNerd gives a positive review of the Kai Fighter (70721), praising its cool design, solid build, and the inclusion of the Kai and General Kryptor minifigures. He highlights the translucent red Techno-Blade as a key design feature.

Reddit Reviews

No Reddit reviews found

YouTube Reviews

1 video

LEGO Ninjago Kai Fighter 70721 Review Unboxing

BricksNerd

42.0K views Review

Community Content: These reviews are from Reddit and YouTube users sharing their personal experiences. Opinions may vary.

📖 Building Instructions 3

70721_X_THERMO-BOLT FIRE FLYER

Download PDF

BI 3004/68+4*-70721 V 29

Download PDF

BI 3004/68+4*-70721 V 39

Download PDF

Inventory Statistics

Unique Parts

196

Official Piece Count

186

Cataloged Inventory Pieces

Minifigures

Spare Parts

The official piece count includes the 10 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Inventory Version: 1

Missing a piece? Use the Missing Piece Checker.