How many pieces are in the Monorail Transport System?

Monorail Transport System contains 731 pieces.

When was the Monorail Transport System released?

Monorail Transport System was released in 1988.

🏛 Futuron

Set #6990

Monorail Transport System

The Monorail Transport System is a nostalgic trip back to the futuristic world of LEGO Futuron.

Before you buy

Who it's for: Intermediate build Ideal for LEGO fans who enjoy vintage sets and unique building experiences, especially those nostalgic for the Futuron theme.
Build: 731 pieces · about 4.5 hours Build time is an estimate.
Price: $129.99 list price · 17.8¢ per piece
Availability: Likely retired

★★★★☆ 4.6 community rating from 150 ratings

A highly coveted set among collectors for its iconic design and nostalgic value. While the original motor can be unreliable, the overall aesthetic and rarity make it a prized possession.

$129.99

Best Price

$116.99

You Save

10% OFF

📝 Our Take

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

The Monorail Transport System is a nostalgic trip back to the futuristic world of LEGO Futuron. Released in 1988, this set captures the essence of space exploration with its sleek monorail design and vibrant color scheme, a true icon of classic LEGO.

This set is perfect for LEGO enthusiasts who appreciate vintage themes and unique building experiences. The monorail system offers a fun and engaging build, and the completed model makes for a fantastic display piece that will spark conversations.

Skip this if you're primarily interested in modern building techniques or play features. While charming, its age shows in its simple construction compared to today's sets. Consider the newer LEGO City trains for more advanced functionality.

✨ New

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🧱 Building Experience

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

🧩

731

Pieces

⏱

4.5h

Estimated Build Time

📊

Intermediate

Difficulty

Build Highlights:

Building the monorail track and support structure
Assembling the motorized monorail train
Integrating the train station with the monorail system
Futuristic design elements and color scheme

📈 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 Monorail Transport System (6990-1) presents a compelling investment opportunity due to its age, rarity, and iconic status within the LEGO Futuron theme. As a retired set from 1988, it's increasingly difficult to find in good condition, driving up its value. The Futuron theme itself has a dedicated following, further enhancing its collectibility. However, potential investors should be aware of the high initial cost and the risk of motor malfunction due to age. Proper storage and maintenance are crucial to preserving its value.

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

⚖ Compare Similar Sets

Message Intercept Base

Blacktron • 433 pcs

$67.00

Compared to modern LEGO train sets, the Monorail Transport System offers a unique, vintage building experience. While lacking the advanced features of newer sets like remote control and Power Functions, its retro charm and historical significance make it a standout piece. For collectors seeking a more modern train experience, consider LEGO City trains. However, for those nostalgic for classic LEGO space themes, the Monorail is a must-have.

5 Minifigures Included

Futuron Spaceman, Yellow with Airtanks and Dark Blue Visor

3x included

Futuron Spaceman, Blue with Airtanks and Dark Blue Visor

2x included

The set includes five classic Futuron minifigures with airtanks and dark blue visors, which are highly sought after by collectors due to their vintage and rarity.

📦 Parts Inventory

Official piece count: 731
Parts cataloged in this inventory: 118 unique parts, 701 pieces
Minifigures: 5

The official piece count includes the 30 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.

Windscreen 4 x 4 ...

Part #: 2337 1× Trans-Dark Blue

Equipment Control...

Part #: 2342 3× White

Brick 2 x 2 Corner

Part #: 2357 4× White

Brick 2 x 2 Corner

Part #: 2357 1× Black

Wedge Plate 10 x ...

Part #: 2401 2× White

Panel 10 x 6 x 11

Part #: 2408 1× Trans-Dark Blue

Panel 10 x 10 x 1...

Part #: 2409 2× Trans-Dark Blue

Plate 2 x 2 Corner

Part #: 2420 4× White

Bracket 2 x 2 - 1...

Part #: 2422 1× Black

Technic Rack Wind...

Part #: 2426c01 1× White

Technic Rack Wind...

Part #: 2426c01 1× Black

Technic Rack 1 x ...

Part #: 2428 2× White

Tile 1 x 4 with G...

Part #: 2431 1× White

Tile 1 x 4 with G...

Part #: 2431 2× Black

Bracket 1 x 2 - 1...

Part #: 2436 2× White

Bracket 1 x 2 - 1...

Part #: 2436 4× Black

Panel 3 x 2 x 5 2/3

Part #: 2448 2× Trans-Dark Blue

Panel 3 x 2 x 5 2/3

Part #: 2448 2× White

Brick Sloped Inve...

Part #: 2449 4× White

Wedge Plate 3 x 3...

Part #: 2450 2× White

Vehicle Track, Mo...

Part #: 2671 2× Light Gray

Vehicle Track, Mo...

Part #: 2672 4× Light Gray

Vehicle Track, Mo...

Part #: 2677 2× Light Gray

Vehicle Track, Mo...

Part #: 2678 2× Light Gray

Support 4 x 4 x 5...

Part #: 2680 2× Black

Support 6 x 6 x 1...

Part #: 2681 8× Black

Motor, Monorail 9...

Part #: 2684c01a 1× White

Wheel Holder, Mon...

Part #: 2686c01 2× Black

Vehicle Base, Mon...

Part #: 2687 2× Black

Vehicle Track, Mo...

Part #: 2774 2× Light Gray

Lever Small Base ...

Part #: 298c02 4× Black

Brick 2 x 4

Part #: 3001 1× Black

Brick 2 x 3

Part #: 3002 2× Black

Brick 2 x 2

Part #: 3003 4× White

Brick 2 x 2

Part #: 3003 8× Black

Brick 1 x 2

Part #: 3004 23× White

Brick 1 x 2

Part #: 3004 8× Black

Brick 1 x 2 with ...

Part #: 3004pr9981 2× White

Brick 1 x 1

Part #: 3005 4× Black

Brick 1 x 1

Part #: 3005 4× White

Brick 1 x 8

Part #: 3008 4× White

Brick 1 x 6

Part #: 3009 3× Black

Brick 1 x 6

Part #: 3009 4× White

Brick 1 x 4

Part #: 3010 5× Black

Brick 1 x 4

Part #: 3010 5× White

Plate 2 x 4

Part #: 3020 1× White

Plate 2 x 4

Part #: 3020 1× Black

Plate 2 x 3

Part #: 3021 2× Black

Plate 2 x 3

Part #: 3021 1× White

Plate 2 x 2

Part #: 3022 7× White

Plate 2 x 2

Part #: 3022 15× Black

Plate 1 x 2

Part #: 3023 5× Black

Plate 1 x 2

Part #: 3023 45× White

Plate 1 x 1

Part #: 3024 8× Trans-Red

Plate 1 x 1

Part #: 3024 2× White

Plate 2 x 8

Part #: 3034 7× White

Plate 4 x 8

Part #: 3035 3× Black

Brick Sloped 45° ...

Part #: 3037 2× White

Brick Sloped 45° ...

Part #: 3039 4× White

Brick Sloped 45° ...

Part #: 3039 1× Black

Brick Sloped 45° ...

Part #: 3039pr9996 2× White

Brick Sloped 45° ...

Part #: 3040b 4× Black

Brick Sloped 45° ...

Part #: 3040bpr0010 2× White

Brick Round 1 x 1...

Part #: 3062b 2× Black

Brick Round 1 x 1...

Part #: 3062b 4× Trans-Red

Tile 2 x 2 with G...

Part #: 3068b 1× Black

Tile 2 x 2 with G...

Part #: 3068b 6× White

Tile 2 x 2 with G...

Part #: 3068bpr0031 2× White

Tile 2 x 2 with A...

Part #: 3068bpr0032 2× White

Tile 1 x 2 with G...

Part #: 3069b 14× White

Tile 1 x 2 with G...

Part #: 3069b 12× Black

Tile 1 x 2 with A...

Part #: 3069bpr0023 6× White

Tile 1 x 1 with G...

Part #: 3070b 3× White

Tile 1 x 1 with R...

Part #: 3070bpr0031 1× White

Tile 1 x 1 with C...

Part #: 3070bpr0039 1× White

Brick Sloped 33° ...

Part #: 3298 1× Black

Plate 1 x 8

Part #: 3460 10× White

Plate 1 x 3

Part #: 3623 2× White

Plate 1 x 3

Part #: 3623 4× Black

Brick Sloped Inve...

Part #: 3660 2× White

Brick Sloped Inve...

Part #: 3665 4× White

Plate 1 x 6

Part #: 3666 2× Black

Turntable 2 x 2 P...

Part #: 3679 2× Light Gray

Turntable 2 x 2 P...

Part #: 3680 1× Black

Turntable 2 x 2 P...

Part #: 3680 1× White

Brick Sloped 75° ...

Part #: 3684 2× White

Plate 1 x 4

Part #: 3710 25× White

Plate 1 x 4

Part #: 3710 3× Black

Plate 1 x 4

Part #: 3710 24× Light Gray

Technic Plate 2 x...

Part #: 3738 1× White

Plate Special 1 x...

Part #: 3794a 2× White

Plate Special 1 x...

Part #: 3794a 6× Black

Plate 2 x 6

Part #: 3795 9× White

Baseplate 32 x 32

Part #: 3811 1× Light Gray

Plate 2 x 10

Part #: 3832 8× White

Baseplate 16 x 32

Part #: 3857 1× Light Gray

Hinge Brick 1 x 2...

Part #: 3937 12× White

Hinge Brick 1 x 2...

Part #: 3938 12× White

Support Round 2 x...

Part #: 3940b 1× Black

Support Round 2 x...

Part #: 3940b 8× White

Brick Round 2 x 2...

Part #: 3941 12× Black

Brick Round 2 x 2...

Part #: 3941 2× Light Gray

Brick Round 2 x 2...

Part #: 3941 3× White

Bracket 2 x 2 - 2...

Part #: 3956 6× White

Antenna 1 x 4 wit...

Part #: 3957a 2× Trans-Dark Blue

Antenna 1 x 4 wit...

Part #: 3957a 2× White

Antenna 1 x 4 wit...

Part #: 3957a 2× Trans-Red

Antenna 1 x 4 wit...

Part #: 3957a 4× Black

Weapon Gun / Torc...

Part #: 3959 1× Black

Dish 4 x 4 Invert...

Part #: 3960 4× White

Equipment Radio [...

Part #: 3962a 1× Black

Tool Screwdriver ...

Part #: 4006 1× Black

Plate Round 2 x 2...

Part #: 4032a 2× White

Plate Round 2 x 2...

Part #: 4032a 8× Black

Window 1 x 2 x 3 ...

Part #: 4035 2× White

Brick Special 1 x...

Part #: 4070 2× White

Brick Special 1 x...

Part #: 4070 4× Black

Plate Special 1 x...

Part #: 4081b 8× Black

Plate Special 1 x...

Part #: 4081b 8× White

Tile Round 2 x 2 ...

Part #: 4150pr0016 2× Light Gray

Tile 1 x 8 with G...

Part #: 4162 9× White

Tile 1 x 8 with G...

Part #: 4162 2× Black

Plate Special 1 x...

Part #: 4175 1× Black

Engine, Strakes, ...

Part #: 4229 4× Black

Hinge Plate 1 x 2...

Part #: 4275b 4× White

Hinge Plate 1 x 2...

Part #: 4276b 4× White

Plate 2 x 16

Part #: 4282 1× Black

Dish 6 x 6 Invert...

Part #: 4285a 3× White

Hinge Vehicle Roo...

Part #: 4315 2× White

Equipment Camera ...

Part #: 4360 1× Black

Brick Sloped 75° ...

Part #: 4460a 4× White

Windscreen 6 x 4 ...

Part #: 4474 2× Trans-Dark Blue

Support 2 x 4 x 5...

Part #: 4476b 2× Black

Support 2 x 4 x 5...

Part #: 4476b 6× White

Plate 1 x 10

Part #: 4477 1× Black

Plate 1 x 10

Part #: 4477 2× White

Cone 1 x 1 [No To...

Part #: 4589 4× White

Cone 1 x 1 [No To...

Part #: 4589 2× Black

Cone 1 x 1 [No To...

Part #: 4589 8× Trans-Red

Cone 1 x 1 [No To...

Part #: 4589 8× Trans-Dark Blue

Plate Special 1 x...

Part #: 4590 2× Black

Brick Special 1 x...

Part #: 4595 4× Black

Plate Special 1 x...

Part #: 4596 6× White

Bracket 3 x 2 - 2...

Part #: 4598 1× White

Bracket 3 x 2 - 2...

Part #: 4598 1× Black

Plate Special 1 x...

Part #: 4623 2× Black

Bar 1 x 3 [Clip /...

Part #: 4735 4× Black

Dish 2 x 2 Invert...

Part #: 4740 1× Trans-Dark Blue

Dish 2 x 2 Invert...

Part #: 4740 16× White

Dish 2 x 2 Invert...

Part #: 4740 5× Trans-Red

Battery Box, 9V S...

Part #: 4760c01pr0001 1× White

Light Brick 1 x 2...

Part #: 4767 1× White

Brick Round 1 x 1...

Part #: 4770 1× Trans-Red

Panel 1 x 2 x 2 [...

Part #: 4864a 4× Trans-Dark Blue

Panel 1 x 2 x 1 [...

Part #: 4865a 20× White

Brick Sloped Inve...

Part #: 4871 2× White

Wire with Brick 2...

Part #: 5306ac015 1× Black

Plate Round 1 x 1...

Part #: 6141 6× Trans-Dark Blue

Plate Round 1 x 1...

Part #: 6141 10× Trans-Red

Flexible Hose 8.5...

Part #: 73590c01a 4× White

Flexible Hose 8.5...

Part #: 73590c01a 2× Black

Hinge Plate 1 x 4...

Part #: 73983 1× White

This set is a great source of white plates and bricks, essential for space-themed MOCs, along with the rarer black stanchions which provide structural support.

🛒 Where to Buy

eBay

✓ In Stock

$116.99 →

Walmart

✓ In Stock

Compare on eBay →

$123.49

Target

✓ In Stock

Compare on eBay →

$129.99

💎 Notable Parts

White Plate 1 x 2 (45x) $2.25

White Plate 1 x 4 (25x) $1.25

Black Support 6 x 6 x 10 Stanchion (8x) $4.00

White Dish 2 x 2 Inverted [Radar] (16x) $4.00

Est. BrickLink Part Value

$11.50

💡 MOC Potential

🏙 Expand the monorail system with additional stations and track layouts.

🚀 Create a futuristic spaceport with the monorail as its transportation hub.

🚗 Design alternative monorail cars or maintenance vehicles.

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 Daily Compulsion's review of the 6991 Monorail Transport Base praises the set's features, including the track system, motor mechanics, and minifigures. The reviewer also highlights the stickers and instructions, emphasizing the set's overall appeal.

LEGO Speed Build: 6991 Monorail Transport Base

The Daily Compulsion • 2.8K views Review

What the Community Says

1 YouTube reviews

BlockTalk AI Summary

Reddit Reviews

No Reddit reviews found

YouTube Reviews

1 video

LEGO Speed Build: 6991 Monorail Transport Base

The Daily Compulsion

2.8K views Review

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

Inventory Statistics

118

Unique Parts

731

Official Piece Count

701

Cataloged Inventory Pieces

Minifigures

The official piece count includes the 30 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Inventory Version: 2

Missing a piece? Use the Missing Piece Checker.