Ninja Speed Showdown!
Kai vs. Ras – 103 Pieces of Racing Action!

Introduce young builders to the world of Ninjago with this thrilling car and bike battle set, featuring two minifigures and a lightning prize!

Breaking News
🏛 Ninjago
Set #71789

Kai and Ras's Car and Bike Battle

Kai and Ras's Car and Bike Battle (71789) is an ideal gateway set for young NINJAGO fans stepping into the world of brick-built action.

Before you buy

Who it's for
Ages 4+ · Beginner build Perfect for young kids aged 4+ starting their LEGO NINJAGO journey and parents building together.
Build
103 pieces · about 0.5 hours Build time is an estimate.
Price
$19.99 list price · 19.4¢ per piece
Availability
Retired at LEGO
★★★☆☆ 3.6 community rating from 16 ratings

Parents and young fans praise the set for its sturdy builds and great character selection, though experienced builders note the simplicity and limited parts variety.

📝 Our Take

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

Kai and Ras's Car and Bike Battle (71789) is an ideal gateway set for young NINJAGO fans stepping into the world of brick-built action. Designed specifically for builders aged 4 and up, this starter set introduces foundational construction techniques without sacrificing the high-octane excitement the theme is known for.

This set is perfect for parents, gift-givers, and young fans of the NINJAGO Dragons Rising TV series. With a quick, satisfying build and two distinct vehicles—Kai's dragon car and Lord Ras's all-terrain vehicle—it offers immediate playability right out of the box for dueling adventures.

Skip this if you are an experienced builder looking for a complex, intricate challenge. Because it is tailored for younger audiences using large starter elements, adult collectors will find the build overly simplistic and lacking in advanced techniques.

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Is this set suitable for a 4-year-old building on their own? What exclusive or notable minifigures come in this set? How does this compare to other NINJAGO 4+ starter sets? Are the vehicles sturdy enough for active play?

🧱 Building Experience

AI-assisted build estimate, grounded in our LEGO database and public community discussions. How we use AI
🧩
103
Pieces
⏱
0.5h
Estimated Build Time
📊
Beginner
Difficulty
📏
22cm × 6cm × 6cm
Dimensions
Build Highlights:
  • Specially designed starter chassis elements make construction fast and frustration-free
  • Features two contrasting vehicles for immediate head-to-head play
  • Includes fun elemental accessories like a blue lightning display piece and flame elements
  • Quick-build format allows younger fans to dive straight into storytelling

📈 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
C+
Investment Grade
⏳ Retired
As a retired 4+ junior set with a low piece count (103 pieces) and an original MSRP of $19.99, Kai and Ras's Car and Bike Battle holds niche appeal primarily for completionist NINJAGO collectors and parents seeking retired starter sets. While it features recognizable characters like Lord Ras and Kai from Dragons Rising, junior sets generally lack the broad secondary market appreciation seen in larger modulars or flagship mechs due to their simplified parts inventory and specialized chassis bricks. However, sealed copies of retired low-priced sets can occasionally creep up in value due to sealed-box collector demand or parents hunting for specific retired gifts. Do not expect massive financial returns, but it should reliably retain its baseline value over time among theme completionists.

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

⚖ Compare Similar Sets

Compared to larger NINJAGO sets like Kai's Mech Rider EVO (71783) or standard $20-30 battle packs, this 4+ set utilizes large pre-molded chassis pieces to keep the build accessible for younger hands. While it lacks the complex brick-stacking of standard sets, it wins on immediate playability and durability for younger children.

2 Minifigures Included

Includes Kai and Lord Ras from the Dragons Rising era, featuring great pearlescent gold shoulder pads and distinct printing that will appeal to character collectors.

📦 Parts Inventory

Official piece count
103
Parts cataloged in this inventory
49 unique parts, 94 pieces
Minifigures
2

The official piece count includes the 9 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Weapon Sword (Uruk-hai) Weapon Sword (Uru...
Part #: 10050 4× Pearl Gold
Rock 1 x 1 Crystal 4 Point Rock 1 x 1 Crysta...
Part #: 11127 1× Trans-Light Blue
Brick Wedged, Curved 3 x 4 x 2/3 Cutout Brick Wedged, Cur...
Part #: 11291 1× Black
Brick Curved 2 x 1 No Studs [1/2 Bow] Brick Curved 2 x ...
Part #: 11477 2× Dark Bluish Gray
Plate Special 1 x 2 5.9mm Centre Side Towball Socket Plate Special 1 x...
Part #: 14704 1× Light Bluish Gray
Brick Curved 2 x 2 x 2/3 Brick Curved 2 x ...
Part #: 15068 1× Dark Red
Panel 1 x 4 x 1 with Rounded Corners [Thin Wall] Panel 1 x 4 x 1 w...
Part #: 15207 2× Red
Panel 1 x 4 x 1 with Rounded Corners [Thin Wall] Panel 1 x 4 x 1 w...
Part #: 15207 2× Dark Bluish Gray
Plate Special 1 x 2 with Three Teeth [Tri-Tooth] Plate Special 1 x...
Part #: 15208 2× Pearl Gold
Plate Special 2 x 2 with Towball and Hole Plate Special 2 x...
Part #: 15456 1× Black
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Plate Special 1 x...
Part #: 15573 3× Dark Red
Brick Sloped 45° 2 x 1 with 2/3 Cutout [New Version] Brick Sloped 45° ...
Part #: 15672 2× Bright Light Orange
Weapon Sword / Katana / Shamshir with Capped Pommel [Square Guard] Weapon Sword / Ka...
Part #: 21459 1× Pearl Gold
Tile Special 2 x 3 Pentagonal Tile Special 2 x ...
Part #: 22385 1× Red
Plate Round Half 4 x 8 Plate Round Half ...
Part #: 22888 1× Dark Tan
Bar Holder with Hole and Bar Handle Bar Holder with H...
Part #: 23443 2× Black
Wedge Plate 3 x 6 Cut Corners Wedge Plate 3 x 6...
Part #: 2419 1× Black
Tile Special 1 x 2 with Handle Tile Special 1 x ...
Part #: 2432 1× White
Wave / Lightning Angular, Single Wave / Lightning ...
Part #: 27256 1× Trans-Light Blue
Bracket 1 x 2 - 1 x 4 [Rounded Corners at Bottom, Square Corners at Top] Bracket 1 x 2 - 1...
Part #: 28802 1× Black
Brick 2 x 3 Brick 2 x 3
Part #: 3002 1× Tan
Brick 1 x 2 Brick 1 x 2
Part #: 3004 1× Dark Red
Brick 1 x 6 Brick 1 x 6
Part #: 3009 1× Tan
Brick 2 x 2 x 3 Brick 2 x 2 x 3
Part #: 30145 1× Red
Plate 2 x 3 Plate 2 x 3
Part #: 3021 1× Bright Light Orange
Plate 1 x 2 Plate 1 x 2
Part #: 3023 1× Green
Weapon Sword with Trans-Orange Blade Pattern Weapon Sword with...
Part #: 3214pat0001 1× Pearl Titanium
Brick Sloped 33° 3 x 2 Brick Sloped 33° ...
Part #: 3298 1× Dark Red
Wheel Hard Plastic Large, D.36, with 4 Studs Wheel Hard Plasti...
Part #: 3486 4× Black
Technic Pin without Friction Ridges Lengthwise Technic Pin witho...
Part #: 3673 12× Yellow
Plate 1 x 4 Plate 1 x 4
Part #: 3710 1× Dark Bluish Gray
Steering Stand 1 x 2 with Black Steering Wheel Steering Stand 1 ...
Part #: 3829c01 2× Light Bluish Gray
Bracket 1 x 2 - 2 x 2 Bracket 1 x 2 - 2...
Part #: 44728 1× Dark Red
Plate Special 1 x 2, Top Clip [Open O] Plate Special 1 x...
Part #: 44861 2× Light Bluish Gray
Dish 2 x 2 Inverted [Radar] Dish 2 x 2 Invert...
Part #: 4740 2× Trans-Orange
Brick Wedged, Curved 2 x 3 x 2/3 Two Studs, Wing End Brick Wedged, Cur...
Part #: 47456 2× Black
Brick Wedged, Curved 2 x 3 x 2/3 Two Studs, Wing End Brick Wedged, Cur...
Part #: 47456 1× Red
Wheel 18 x 14 with Pin Hole, Fake Bolts and Shallow Spokes Wheel 18 x 14 wit...
Part #: 55981 3× Pearl Gold
Cone 1 x 1 [Top Groove] Cone 1 x 1 [Top G...
Part #: 59900 4× Pearl Gold
Plate Special 1 x 2 with Clips Horizontal [Open O Clips] Plate Special 1 x...
Part #: 60470b 2× Black
Plate Special 1 x 4 with Angled Tubes Plate Special 1 x...
Part #: 61072 1× Flat Silver
Wave / Flame Rounded with Base Rim Wave / Flame Roun...
Part #: 6126b 3× Trans-Orange
Brick Wedged, Curved 4 x 3 No Studs with Gold Decorations, Dark Red/Bright Light Orange Symbol Print Brick Wedged, Cur...
Part #: 64225pr9997 1× Black
Vehicle Body, Motorcycle / Quadricycle Frame Vehicle Body, Mot...
Part #: 70682 2× Black
Vehicle Body, Motorcycle / Quadricycle Frame Vehicle Body, Mot...
Part #: 70682 2× Red
Creature Body Part, Dragon Head with Spikes with Trans-Yellow Pattern, Dark Red and Yellow Eyes, Red Flames Print Creature Body Par...
Part #: 82276pat0002pr0003 1× Pearl Gold
Plate Round 1 x 1 with Open Stud Plate Round 1 x 1...
Part #: 85861 1× Trans-Orange
Brick Sloped 30° 1 x 2 x 2/3 Brick Sloped 30° ...
Part #: 85984 1× Black
Brick Special 2 x 2 with Grooves and Axle Hole Brick Special 2 x...
Part #: 90258 1× Dark Orange
Tyre 30.4 x 14 Offset Tread [Centre Band] Tyre 30.4 x 14 Of...
Part #: 92402 3× Black
Brick Round 2 x 2 Truncated Cone Brick Round 2 x 2...
Part #: 98100 1× Black
Weapon Sword, Big Blade with Bar Weapon Sword, Big...
Part #: 98137 2× Pearl Gold
Features a helpful assortment of basic wheels, trans-orange flame elements, and pearl gold swords, though heavily reliant on specialized 4+ starter chassis frames.

🛒 Where to Buy

💎 Notable Parts

Red Vehicle Body, Motorcycle / Quadricycle Frame (2x) $1.50
Pearl Gold Weapon Sword (Uruk-hai) (4x) $1.20
Trans-Orange Wave / Flame Rounded with Base Rim (3x) $0.75
Black Wheel Hard Plastic Large, D.36, with 4 Studs (4x) $1.00
Est. BrickLink Part Value
$4.45

💡 MOC Potential

🚗 Custom mini-car and motorcycle modifications using the included wheels and frames
🤖 Small-scale arena or training obstacle builds for NINJAGO mini-figures

Community Insights

Real opinions from Reddit and YouTube

What Reddit Says

No Reddit discussions found for this set.

What YouTubers Say

Based on 7 videos
3.0 /5
Mixed
0% positive
BlockTalk AI

Community Sentiment

Based on 7 YouTube reviews

Reddit

Not enough Reddit data

YouTube

3.0 /5
Mixed
0% positive
0
Positive
7
Mixed
0
Critical
BlockTalk AI Analysis

📖 Building Instructions 5

Kai and Ras's Car and Bike Battle Instructions
BI 3102, 60, 71789 1/2 V29
Download PDF
Kai and Ras's Car and Bike Battle Instructions
BI 3102, 64+4, 71789 2/2 V29
Download PDF
Kai and Ras's Car and Bike Battle Instructions
BI 3102, 60, 71789 1/2 V39
Download PDF
Kai and Ras's Car and Bike Battle Instructions
BI 3102, 64+4, 71789 2/2 V39
Download PDF
Kai and Ras's Car and Bike Battle Instructions
BI 3102, 60, 71789 1/2 V29
Download PDF

Charts Inventory Statistics

49
Unique Parts
103
Official Piece Count
94
Cataloged Inventory Pieces
2
Minifigures
2
Spare Parts

The official piece count includes the 9 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Inventory Version: 1

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