How To Get Train Parts
After the Bridge Worker fixes the bridge near the Trading Post, Link will be able to trade in Treasure pieces in order to get train parts. Go to the Trading Post and speak with Linebeck III. Select Train Parts and scroll through to the Train Part that you would like to purchase. Instead of paying with rupees, Link can exchange various treasures for the different Train Parts.
There are four different train cars on the train. Link will start the game off with the Spirit Engine and the Solid Passenger Car. After going through the Tower of Spirits for a 2nd time, Alfonzo will upgrade the train and add a cannon. Much later in the game when Link reaches Goron Village, a freight car to the back of the train.
Customize The Train
There are eight different types of train sets in Spirit Tracks. The standard train is the Spirit Train and it will have four heart containers of health. However, as Link customizes the train, he can increase the amount of health the train has.
4 Hearts - Complete Spirit Train
5 Hearts - Any 1 Customized Train Part
6 Hearts - Complete Customized Set
8 Hearts - Complete Customized Gold Train
After getting the train parts from Linebeck, Link can have him put them on immediately. However, at any point if Link would like to change the train parts that the train currently has, he will have to go to Aboda Village and speak with Alfonzo, who will customize the train for Link.
||This esteemed train has a long history of keeping evil at bay.
||You can be sure that any shot fired from this cannon will hit home.
|Solid Passenger Car
||Whoever crafted this well-made carriage must have been a true master.
|Trusty Freight Car
||There's no need to worry about damaged goods with this car.
|| Pearl Necklace ×2, Ruto Crown ×1, Goron Amber ×2
||This steam train appeals to strong, silent types everywhere.
|| Pearl Necklace ×2, Dragon Scale ×2, Mystic Jade ×1
||This steel cannon has unmatched accuracy. Its only hurdle is its weight.
|Sturdy Passenger Car
|| Pearl Necklace ×2, Pirate Necklace ×3, Ancient Gold Piece ×1
||There may not be much room in this carriage, but it's incredibly safe.
|Efficient Freight Car
|| Pearl Necklace ×2, Pirate Necklace ×3, Goron Amber ×1
||The sleek, black luster is reminiscent of trains from the good old days.
|| Stalfos Skull ×4, Bee Larvae ×3, Ruto Crown ×2
||Created by a gearhead, it's unclear whether it can even go underground.
|| Stalfos Skull ×2, Demon Fossil ×3, Dragon Scale ×1
||This cannon might be brightly colored, but it packs quite a punch.
|Skull Passenger Car
|| Stalfos Skull ×3, Star Fragment ×2, Pearl Necklace ×1
||This car has all the bells and whistles technology experts could cram in.
|Skull Freight Car
|| Stalfos Skull ×2, Wood Heart ×4, Pirate Necklace ×2
||It's not clear how this car floats. Maybe there's a magic carpet inside?