How many pieces are in the Jay's Electro Mech?

Jay's Electro Mech contains 106 pieces.

What age is the Jay's Electro Mech recommended for?

This set is recommended for ages 4+.

When was the Jay's Electro Mech released?

Jay's Electro Mech was released in 2021.

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LEGO Retiring Soon List – October 2026 Update

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🏛 Ninjago

Set #71740

Jay's Electro Mech

Jay's Electro Mech is a fantastic entry point for young builders stepping up to standard LEGO systems.

Before you buy

Who it's for: Ages 4+ · Beginner build Perfect for younger kids aged 4+ learning to build with system bricks
Build: 106 pieces · about 0.5 hours Build time is an estimate.
Price: $19.99 list price · 18.9¢ per piece
Availability: Retired at LEGO

★★★☆☆ 3.7 community rating from 27 ratings

Fans appreciate the great value and accessibility for younger builders, though older collectors find the build too simplistic and juniorized.

$19.99

Check price on eBay

📝 Our Take

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

Jay's Electro Mech is a fantastic entry point for young builders stepping up to standard LEGO systems. Released in 2021 as part of the NINJAGO Legacy line, it bridges the gap between DUPLO/Juniors and full construction sets with an accessible build that still packs plenty of action.

This set is perfect for young LEGO fans aged 4 and up or parents introducing their kids to NINJAGO. With just 106 pieces, it offers a quick, frustration-free building experience and includes both a mech and a ninja car for instant play value.

Skip this if you are an older fan looking for complex building techniques or an extensive display piece. At this scale and price point, it is strictly designed for play rather than advanced collecting.

✨ New

Ask BlockTalk about this set

AI assistant with full set data

BlockTalk

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

Try asking:

Is Jay's Electro Mech suitable for absolute beginners? What minifigures are included in set 71740? How does this 4+ set compare to larger NINJAGO mechs? Is this set a good investment for sealed collectors?

🧱 Building Experience

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

🧩

106

Pieces

⏱

0.5h

Estimated Build Time

📊

Beginner

Difficulty

📏

17cm × 10cm × 16cm

Dimensions

Build Highlights:

Bag-by-bag building system designed specifically for young beginners
Posable mech limbs for dynamic play action
Includes a fun ninja car and spider toy to expand the battle scene
Features a collectible golden-sword display stand

📈 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 4+ junior set with a relatively low piece count (106 pieces) and an original MSRP of $19.99, Jay's Electro Mech occupies a niche corner of the secondary market. While retired, sets aimed at this very young demographic rarely see massive appreciation among adult collectors unless they feature exclusive, highly sought-after minifigures. However, sealed copies can still attract parents looking for retired NINJAGO starter sets for their kids. The inclusion of Eyezor and a Legacy version of Jay adds mild nostalgic appeal, but overall investment potential remains modest compared to larger playsets or 18+ display models.

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

⚖ Compare Similar Sets

Lloyd's Mech Battle EVO

Compared to standard NINJAGO mechs which target older age groups with hundreds of pieces and complex joints, 71740 keeps things simple with larger, foundational elements. If you want a more substantial building challenge, look toward sets in the 7+ or 9+ brackets like Lloyd's Mech Battle.

2 Minifigures Included

Eyezor - Legacy

4 parts

Jay in Rebooted Outfit with Head Wrap (Legacy)

4 parts

Includes Jay in his Rebooted Legacy outfit and the villain Eyezor, offering a great way for young fans to grab two key characters from season 4 without breaking the bank.

📦 Parts Inventory

Official piece count: 106
Parts cataloged in this inventory: 56 unique parts, 98 pieces
Minifigures: 2

The official piece count includes the 8 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.

Plate Special 2 x...

Part #: 10247 1× Yellow

Plate Special 1 x...

Part #: 14704 2× Light Bluish Gray

Tile Round 2 x 2 ...

Part #: 14769 4× Dark Purple

Tile Round 2 x 2 ...

Part #: 14769pr1173 4× Pearl Gold

Tile Round 2 x 2 ...

Part #: 14769pr9998 1× Pearl Gold

Plate Special 2 x...

Part #: 15456 2× Black

Brick Sloped 45° ...

Part #: 15571 1× Pearl Gold

Plate Round Half ...

Part #: 22888 1× Tan

Brick Sloped Inve...

Part #: 22889 2× Dark Blue

Brick Curved 3 x ...

Part #: 24309 4× Blue

Tile 2 x 3

Part #: 26603 1× Dark Tan

Insect, Spider wi...

Part #: 29111 1× Medium Nougat

Vehicle Base, Bri...

Part #: 30076 1× Black

Animal, Scorpion

Part #: 30169 1× Dark Blue

Plant, Round 1 x ...

Part #: 30176 2× Green

Plate 2 x 3

Part #: 3021 2× Light Bluish Gray

Plate 2 x 2

Part #: 3022 2× Blue

Brick Special 1 x...

Part #: 30237b 2× Dark Bluish Gray

Brick Sloped 45° ...

Part #: 3044c 1× Dark Bluish Gray

Brick Curved 2 x ...

Part #: 30602 2× Dark Tan

Plate 1 x 8

Part #: 3460 1× Dark Blue

Brick 1 x 3

Part #: 3622 2× Light Bluish Gray

Brick Arch 1 x 4

Part #: 3659 2× Black

Technic Pin witho...

Part #: 3673 1× Light Bluish Gray

Technic Brick 1 x...

Part #: 3700 2× Yellow

Plate 1 x 4

Part #: 3710 2× Dark Purple

Brick Round 2 x 2...

Part #: 3941 1× Trans-Orange

Large Figure Weap...

Part #: 41125 1× Flat Silver

Brick Sloped 75° ...

Part #: 4460b 2× Reddish Brown

Wedge Brick Speci...

Part #: 44665 1× Blue

Mudguard 2 x 4 wi...

Part #: 44674 4× Dark Blue

Bracket 1 x 2 - 2...

Part #: 44728 1× Black

Bracket 1 x 2 - 2...

Part #: 44728 2× Dark Blue

Projectile, Arrow...

Part #: 46537 1× Light Bluish Gray

Brick Curved 2 x ...

Part #: 47457 1× Olive Green

Rock Panel 2 x 4 x 6

Part #: 47847 1× Dark Bluish Gray

Technic Brick Spe...

Part #: 48172 1× Black

Tile Special 2 x ...

Part #: 49153 1× White

Launcher, Brick S...

Part #: 49743c01 1× Dark Bluish Gray

Wedge Plate 2 x 4

Part #: 51739 1× Dark Blue

Plate Special 1 x...

Part #: 60470b 2× Light Bluish Gray

Plate Special 1 x...

Part #: 60470b 1× Yellow

Plate Round 4 x 4...

Part #: 60474 2× Yellow

Weapon Sword / Sc...

Part #: 60752 1× Flat Silver

Technic Pin with ...

Part #: 61332 1× Black

Tile 1 x 3 with W...

Part #: 63864pr0012 2× Dark Tan

Brick Wedged, Slo...

Part #: 64867 1× Dark Bluish Gray

Brick Curved 4 x ...

Part #: 66955 2× Dark Blue

Mech Leg, Right, ...

Part #: 70943c01 1× Blue

Mech Leg, Left, w...

Part #: 70946c01 1× Blue

Brick Sloped 30° ...

Part #: 85984 2× Dark Purple

Tile 2 x 4 with G...

Part #: 87079 2× Light Bluish Gray

Brick Round 4 x 4...

Part #: 87081 4× Dark Bluish Gray

Brick Round 4 x 4...

Part #: 87081 1× Black

Plate Special 2 x...

Part #: 87580 1× Black

Animal Body Part,...

Part #: 92691 2× White

Brick Round 2 x 2...

Part #: 92947 2× Pearl Gold

Weapon Sword, Big...

Part #: 98137 3× Pearl Gold

Weapon Sai

Part #: 98139 1× Pearl Gold

A solid assortment of dark blue and pearl gold elements, including printed shuriken tiles and useful mudguards that appeal to custom vehicle builders.

🛒 Where to Buy

eBay

Search listings

→

💎 Notable Parts

Pearl Gold Tile Round 2 x 2 with Black Shuriken Print (4x) $3.20

Dark Blue Mudguard 2 x 4 with Molded Headlights (4x) $2.50

Pearl Gold Weapon Sword, Big Blade with Bar (3x) $1.80

Dark Purple Tile Round 2 x 2 with Bottom Stud Holder (4x) $1.20

Est. BrickLink Part Value

$8.70

💡 MOC Potential

🤖 Upgrade the mech into a larger, fully articulated mecha using standard technic and system parts

🚗 Repurpose the dark blue and pearl gold pieces for custom cyberpunk street vehicles

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

Reviews of the LEGO Ninjago Jay's Electro Mech (71740) are generally mixed, with many videos simply showcasing the build process or comparing it to older versions. While not overwhelmingly positive or negative, reviewers like Bricks By Mind find some redeeming qualities in the set.

Which Jay's Electro Mech is Better? - Ninjago Legacy vs Original Comparison! (Old vs New)

Bricks By Mind • 26.7K views Comparison

LEGO Ninjago Legacy Jay's Electro-Mech review! 2021 set 71740!

just2good • 25.5K views Review

This Set is Actually Kinda Good? - Jay's Electro Mech Review! NEW Ninjago Legacy Set 71740

Bricks By Mind • 8.9K views Review

Community Sentiment

Based on 7 YouTube reviews

Not enough Reddit data

YouTube

3.0 /5

Mixed

0% positive

Positive

Mixed

Critical

BlockTalk AI Analysis

What the Community Says

6 YouTube reviews

BlockTalk AI Summary

just2good provides a straightforward review of the set within the Ninjago Legacy line, while The TTV Channel tackles the set with a focus on its suitability for younger builders (4+). Swedish Brick offers a build-along video, and Bricks By Mind offers a comparison of the new and old versions.

Reddit Reviews

No Reddit reviews found

YouTube Reviews

6 videos

Which Jay's Electro Mech is Better? - Ninjago Legacy vs Original Comparison! (Old vs New)

Bricks By Mind

26.7K views Comparison

LEGO Ninjago Legacy Jay's Electro-Mech review! 2021 set 71740!

just2good

25.5K views Review

This Set is Actually Kinda Good? - Jay's Electro Mech Review! NEW Ninjago Legacy Set 71740

Bricks By Mind

8.9K views Review

NINJAGO 2021 Set Review: 71740 Jay's Electro Mech

The TTV Channel

2.6K views Review

View all 6 on YouTube

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

📖 Building Instructions 4

BI 3106, 28, 71740 1/2 V29

Download PDF

BI 3106, 28, 71740 1/2 V39

Download PDF

BI 3101, 32, 71740 2/2 V29

Download PDF

BI 3101, 32, 71740 2/2 V39

Download PDF

Inventory Statistics

Unique Parts

106

Official Piece Count

Cataloged Inventory Pieces

Minifigures

Spare Parts

The official piece count includes the 8 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.