I upgraded my 7810 (40370) with a 4.5v motor and headlight : r/lego
LEGO Technic Ref.8700 - 4.5V Expert Builder Power Pack
870-1 Technical Motor, 4.5V Reviews - Brick Insights
LEGO 4.5V Motor Set with Rubber Tracks 103-1 | Brick Owl - LEGO Marketplace
Amazon.com: Lego #7851 4.5v Curved Gray Track : Toys & Games
LEGO part 3173c01 - Tan Record and Play Module, 16 x 10 x 4 with Built-in Motors 4.5V at BrickScout
LEGO 182 4.5v Train Set with Signal Set Parts Inventory and Instructions - LEGO Reference Guide
LEGO Lighting Bricks, 4.5V Set 816 | Brick Owl - LEGO Marketplace
LEGO 180 4.5V Train with 5 Wagons Instructions, Trains
LEGO 4.5 Volts - LEGO Train Tech - Eurobricks Forums
LEGO 4.5V Train 7720 Battery Train Set from 1980 Vintage Set! review - YouTube
180-1 4.5V Train with 5 Wagons Reviews - Brick Insights
LEGO 7720 4.5v Battery Operated Diesel Train Complete with Box and Instructions | eBay
Electric, Motor 4.5V (Undetermined Type) : Part 6216m | BrickLink
LEGO Trains 4.5V | Brickset
Replacement 4.5V Motor : Set 104-1 | BrickLink
100 4.5V Motor with Wheels (Small Version) LEGO Set, Deals & Reviews
Lego® 4.5V 12V TRAIN AK 7816 Shell Tanker Wagon Freight Wagon | eBay
LEGO 870 Technical Motor, 4.5 V | BrickEconomy
Vintage LEGO 4.5V Train 7722 Battery Train Set from 1985 Steam Cargo - YouTube
901-1 4.5V Universal Motor Set - Swooshable
Sets that have x468: Electric 4.5V Battery Box 6 x 11 x 3 & 1/3
LEGO part 6216m2 - Light Gray Electric, Motor 4.5V Type 2 for 2-prong connectors WITH middle pin at BrickScout
