How many pieces are in the Kai Fighter?

Kai Fighter contains 513 pieces.

What age is the Kai Fighter recommended for?

This set is recommended for ages 8+.

When was the Kai Fighter released?

Kai Fighter was released in 2020.

Breaking News

LEGO Retiring Soon List – October 2026 Update

The Brick Fan • about 19 hours ago

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🏛 Ninjago

Set #71704

Kai Fighter

The Kai Fighter is a sleek and dynamic addition to any Ninjago collection.

Before you buy

Who it's for: Ages 8+ · Intermediate build Ideal for Ninjago fans and LEGO builders aged 9+, who enjoy aircraft models and action-packed play scenarios.
Build: 513 pieces · about 4.5 hours Build time is an estimate.
Price: $39.99 list price · 7.8¢ per piece
Availability: Retired at LEGO

★★★★☆ 4.0 community rating from 96 ratings

Fans appreciate the updated design of the Kai Fighter and the inclusion of Legacy minifigures. Some criticisms include the repetitive nature of certain build steps and that the price point felt slightly high for the piece count.

$39.99

Check price on eBay

📝 Our Take

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

The Kai Fighter is a sleek and dynamic addition to any Ninjago collection. Based on the Legacy series, this set reimagines Kai's iconic fighter jet with updated building techniques and a striking color scheme. It's a fantastic way to celebrate Ninjago's rich history.

This set is perfect for Ninjago enthusiasts and fans of aircraft models. The build offers a satisfying experience with a moderate piece count, making it engaging without being overly complex. The included minifigures add playability and display options.

Skip this if you prefer larger, more intricate models or are not a fan of the Ninjago theme. Consider sets like the Ninjago City Gardens for a more expansive building experience, or explore other LEGO themes that align with your interests.

✨ 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 to highlight its features? Is this set a good value for the piece count and included minifigures? How has the value of similar retired Ninjago sets changed over time?

🧱 Building Experience

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

🧩

513

Pieces

⏱

4.5h

Estimated Build Time

📊

Intermediate

Difficulty

📏

13cm × 34cm × 43cm

Dimensions

Build Highlights:

Creative use of angled plates to achieve aerodynamic shaping
Sturdy construction ensures swooshability for dynamic play
Detailed cockpit design with printed elements
Includes spring-loaded shooters for action features

📈 Investment Analysis

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

Not enough price history for a trend

B+

Investment Grade

⏳ Retired

The Kai Fighter, being a retired Ninjago set, possesses decent investment potential. Ninjago is a consistently popular theme with a dedicated fanbase, which supports the secondary market value of its sets. The set's reasonable piece count and the inclusion of Legacy minifigures enhance its collectibility. However, its relatively recent retirement means that appreciation may be gradual rather than immediate, and broader market conditions can always impact returns. As always, keeping the set sealed and in excellent condition will be critical to maximizing its value over time.

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

⚖ Compare Similar Sets

Zane's Gold Dragon Jet

Ninjago • 258 pcs

$34.99

The Kai Fighter offers a balance of playability and display value, fitting well within the Ninjago vehicle subtheme. Compared to larger Ninjago sets like the Fire Temple, it's more accessible in terms of price and building time. For those seeking a similar building experience but with different aesthetics, consider sets from the LEGO City or Creator themes.

4 Minifigures Included

Nindroid with Dual Sided Head, Wraps (Legacy)

4 parts

Nindroid with Dual Sided Head, Shoulder Armor (Legacy)

5 parts

Kai with Hair (Legacy)

5 parts

B+

Lloyd (Legacy) - MASTER

5 parts

B+

The set includes four Legacy minifigures, featuring updated designs of Kai, Lloyd, and two Nindroids. These Legacy minifigures are desirable for collectors, adding to the set's overall appeal.

📦 Parts Inventory

Official piece count: 513
Parts cataloged in this inventory: 135 unique parts, 494 pieces
Minifigures: 4

The official piece count includes the 19 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.

Brick Curved 4 x ...

Part #: 11153 4× Red

Tile Special 2 x ...

Part #: 11203 1× Black

Plate 3 x 3

Part #: 11212 2× Dark Bluish Gray

Technic Axle Pin ...

Part #: 11214 2× Dark Bluish Gray

Plate Special 1 x...

Part #: 11458 2× Black

Plate Special 1 x...

Part #: 11476 4× Black

Brick Curved 2 x ...

Part #: 11477 4× Black

Brick Curved 2 x ...

Part #: 11477 2× Red

Brick Curved Inve...

Part #: 13547 2× Black

Brick Curved 10 x...

Part #: 13731 2× Red

Tile Round 2 x 2 ...

Part #: 14769 2× Black

Brick Curved 2 x ...

Part #: 15068 1× Red

Projectile, Sprin...

Part #: 15303 2× Trans-Red

Projectile, Sprin...

Part #: 15303 3× Trans-Orange

Launcher, Brick S...

Part #: 15400 3× Dark Bluish Gray

Technic Axle 5 wi...

Part #: 15462 2× Reddish Brown

Plate Special 1 x...

Part #: 15573 1× Dark Bluish Gray

Wedge Plate 4 Stu...

Part #: 15706 8× Black

Tile Special 1 x ...

Part #: 15712 1× Black

Flag 5 x 6 Hexago...

Part #: 17979 2× Red

Technic Pin Conne...

Part #: 18654 2× Black

Technic Pin Conne...

Part #: 18654 2× Dark Bluish Gray

Weapon Sword / Ka...

Part #: 21459 2× Red

Weapon Sword / Ka...

Part #: 21459 4× Flat Silver

Tile Special 1 x ...

Part #: 2412b 5× Pearl Gold

Plate 2 x 2 Corner

Part #: 2420 12× Black

Brick Curved Inve...

Part #: 24201 1× Dark Bluish Gray

Tile Round 1 x 1 ...

Part #: 24246 1× Trans-Orange

Wedge Plate 2 x 2...

Part #: 24299 3× Red

Wedge Plate 2 x 2...

Part #: 24299 1× Black

Wedge Plate 2 x 2...

Part #: 24307 3× Red

Wedge Plate 2 x 2...

Part #: 24307 1× Black

Tile 1 x 4 with G...

Part #: 2431 4× Red

Tile 1 x 4 with G...

Part #: 2431 2× Black

Plate 2 x 12

Part #: 2445 1× Light Bluish Gray

Wedge Plate 3 x 3...

Part #: 2450 2× Black

Wedge Plate 3 x 3...

Part #: 2450 8× Red

Plate Special 2 x...

Part #: 2476a 4× Dark Tan

Plate Special 1 x...

Part #: 2540 1× Dark Bluish Gray

Brick Special 1 x...

Part #: 2653 2× Black

Part #: 2780 4× Black

Brick Sloped 45° ...

Part #: 28192 2× Dark Purple

Part #: 29119 3× Black

Brick Wedged, Cur...

Part #: 29120 3× Black

Brick Wedged, Cur...

Part #: 29120 3× Red

Brick 2 x 2

Part #: 3003 1× Black

Brick 1 x 4

Part #: 3010 2× Red

Brick Special 1 x...

Part #: 30136 4× Dark Bluish Gray

Plate 2 x 4

Part #: 3020 1× Black

Plate 2 x 4

Part #: 3020 6× Dark Bluish Gray

Plate 2 x 3

Part #: 3021 5× Reddish Brown

Plate 2 x 2

Part #: 3022 14× Light Bluish Gray

Plate 1 x 2

Part #: 3023 13× White

Plate 4 x 4

Part #: 3031 2× Dark Bluish Gray

Plate 2 x 8

Part #: 3034 1× Red

Plate 2 x 8

Part #: 3034 1× White

Hinge Brick 1 x 2...

Part #: 30365 2× Light Bluish Gray

Bar 4L (Lightsabe...

Part #: 30374 2× Black

Brick Sloped 45° ...

Part #: 3039 1× Light Bluish Gray

Part #: 3069b 2× Black

Tile 1 x 2 with G...

Part #: 3069b 5× Red

Tile 1 x 2 with G...

Part #: 3069b 2× Dark Purple

Tile 1 x 1 with G...

Part #: 3070b 2× Red

Technic Brick 1 x...

Part #: 32000 6× Dark Bluish Gray

Technic Pin Long ...

Part #: 32054 2× Light Bluish Gray

Technic Pin Long ...

Part #: 32054 4× Black

Wedge Plate 4 x 6...

Part #: 32059 1× Black

Technic Bush 1/2 ...

Part #: 32123b 6× Light Bluish Gray

Technic Plate 1 x...

Part #: 32124 2× Black

Technic Beam 1 x ...

Part #: 32316 2× Black

Technic Beam 1 x ...

Part #: 32523 1× Black

Plate Special 1 x...

Part #: 34103 1× Dark Red

Plate Special 1 x...

Part #: 35480 13× Dark Bluish Gray

Minifig Neckwear ...

Part #: 35635 1× Black

Tile 45° Cut 2 x ...

Part #: 35787 2× Black

Brick 1 x 3

Part #: 3622 2× Red

Plate 1 x 3

Part #: 3623 2× Dark Bluish Gray

Brick Sloped Inve...

Part #: 3660 2× Red

Brick Sloped Inve...

Part #: 3660 1× Black

Technic Pin witho...

Part #: 3673 1× Light Bluish Gray

Turntable 2 x 2 P...

Part #: 3679 4× Light Bluish Gray

Turntable 2 x 2 P...

Part #: 3680 4× Red

Bracket 1 x 1 - 1...

Part #: 36840 4× Reddish Brown

Bracket 1 x 1 - 1...

Part #: 36841 4× Light Bluish Gray

Technic Brick 1 x...

Part #: 3701 4× Dark Bluish Gray

Plate 1 x 4

Part #: 3710 16× Black

Brick Sloped Inve...

Part #: 3747b 1× Black

Brick Sloped Inve...

Part #: 3747b 1× Red

Plate 2 x 6

Part #: 3795 3× Black

Plate 2 x 10

Part #: 3832 2× Black

Plate 2 x 10

Part #: 3832 1× Red

Plate Round 2 x 2...

Part #: 4032a 5× Black

Tile 1 x 8 with G...

Part #: 4162 2× White

Part #: 42003 4× Light Bluish Gray

Brick Sloped 33° ...

Part #: 4286 2× Red

Brick Sloped Inve...

Part #: 4287b 2× Dark Bluish Gray

Hinge Plate 2 x 4...

Part #: 43045 3× Black

Hinge Plate 2 x 4...

Part #: 43056 1× Light Bluish Gray

Technic Axle Pin ...

Part #: 43093 4× Blue

Brick Wedged, Cur...

Part #: 43713 1× Black

Wedge Plate 4 x 4...

Part #: 43719 1× Red

Wedge Plate 3 x 2...

Part #: 43722 2× Black

Wedge Plate 3 x 2...

Part #: 43723 2× Black

Bracket 1 x 2 - 2...

Part #: 44728 3× Light Bluish Gray

Wedge Plate 12 x ...

Part #: 47397 1× Black

Part #: 47398 1× Black

Wedge Plate 6 x 4...

Part #: 48205 2× Red

Wedge Plate 6 x 4...

Part #: 48205 1× Black

Wedge Plate 6 x 4...

Part #: 48208 2× Red

Wedge Plate 6 x 4...

Part #: 48208 1× Black

Plate Special 1 x...

Part #: 48336 1× Yellow

Brick Sloped Inve...

Part #: 4871 4× Black

Wedge Plate 2 x 4

Part #: 51739 1× Red

Weapon Axe Head, ...

Part #: 53454 1× Flat Silver

Brick Sloped 30° ...

Part #: 54200 1× Trans-Red

Brick Sloped 30° ...

Part #: 54200 2× Dark Purple

Brick Sloped 30° ...

Part #: 54200 1× Trans-Green

Brick Sloped 30° ...

Part #: 54200 2× Red

Cone 1 x 1 [Top G...

Part #: 59900 2× Trans-Red

Plate Round 4 x 4...

Part #: 60474 2× Black

Plate Special 1 x...

Part #: 60478 6× Black

Plate Special 1 x...

Part #: 60478 5× Dark Bluish Gray

Tool Chainsaw Blade

Part #: 6117 1× Dark Bluish Gray

Plate Special 1 x...

Part #: 61252 2× Pearl Gold

Brick Sloped 18° ...

Part #: 61409 2× Black

Brick Sloped 18° ...

Part #: 61409 6× Red

Brick Sloped 18° ...

Part #: 61409 4× Metallic Silver

Plate Round 1 x 1...

Part #: 6141 22× Pearl Gold

Tail Shuttle

Part #: 6239 2× Red

Tile 1 x 3

Part #: 63864 2× Black

Plate Special 1 x...

Part #: 63868 1× Yellow

Plate Special 1 x...

Part #: 63868 4× Black

Part #: 6636 2× Black

Brick Wedged, Cur...

Part #: 66956 1× Red

Sticker Sheet for...

Part #: 67938 1× [No Color/Any Color]

Brick Sloped 30° ...

Part #: 85984 2× Red

Brick Sloped 30° ...

Part #: 85984 11× Black

Brick Sloped 30° ...

Part #: 85984pr0002 1× Dark Bluish Gray

Tile 2 x 4 with G...

Part #: 87079 2× Black

Brick Curved 2 x ...

Part #: 88930 2× Red

Plate Special 1 x...

Part #: 92280 2× Dark Bluish Gray

Plate Special 1 x...

Part #: 92280 6× Red

Windscreen 8 x 4 ...

Part #: 92579 1× Trans-Brown

Bar 1L with Top S...

Part #: 92690 1× Pearl Titanium

Arm Skeleton [Ben...

Part #: 93609 1× Black

Brick Round 2 x 2...

Part #: 98100 1× Black

Propeller 1 Blade...

Part #: 98135 2× Pearl Gold

Weapon Sword, Big...

Part #: 98137 2× Pearl Gold

Tile Round 1 x 1

Part #: 98138 3× Light Bluish Gray

Arm Mechanical wi...

Part #: 98313 2× Black

Tile Special 1 x ...

Part #: 99563 1× Black

Tile Special 1 x ...

Part #: 99563 2× White

Bracket 1 x 2 - 1...

Part #: 99780 14× Red

Bracket 1 x 2 - 1...

Part #: 99781 5× Black

The parts inventory offers a good selection of plates, wedges, and brackets in red, black, and dark bluish gray, useful for MOC builders creating vehicles or architectural models. The pearl gold elements add a touch of detail and are always sought after.

🛒 Where to Buy

eBay

Search listings

→

💎 Notable Parts

Pearl Gold Plate Round 1 x 1 with Solid Stud (22x) $4.40

Red Bracket 1 x 2 - 1 x 2 Inverted (14x) $2.80

Dark Bluish Gray Plate Special 1 x 2 Rounded with 2 Open Studs (13x) $2.60

Red Wedge Plate 3 x 3 Cut Corner (8x) $1.60

Pearl Gold Tile Special 1 x 2 Grille with Bottom Groove (5x) $2.50

Est. BrickLink Part Value

$13.90

💡 MOC Potential

🚀 Futuristic space fighter or interceptor

🚗 Modified ground vehicle with jet propulsion

🤖 Transforming robot with aircraft components

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

BrickQueen's positive review of the original Kai Fighter (70721) praises its vehicle design and color scheme, especially highlighting the transformation between flying and speed modes. The inclusion of Kai and General Kryptor minifigures is also noted as a key feature.

LEGO Kai Fighter 70721 Ninjago 2014 Review - BrickQueen

BrickQueen • 20.0K views Unboxing

What the Community Says

1 YouTube reviews

BlockTalk AI Summary

Reddit Reviews

No Reddit reviews found

YouTube Reviews

1 video

LEGO Kai Fighter 70721 Ninjago 2014 Review - BrickQueen

BrickQueen

20.0K views Unboxing

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

📖 Building Instructions 2

BI 3106, 128+4/65+200G, 71704 V29

Download PDF

BI 3106, 128+4, 71704 V39

Download PDF

Inventory Statistics

136

Unique Parts

513

Official Piece Count

494

Cataloged Inventory Pieces

Minifigures

Spare Parts

The official piece count includes the 19 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.