Free tool
Rule out the usual hiding places first. If the piece really is gone, check the set piece by piece and leave with the element ID LEGO asks for, or a link to buy the part.
Checking
48 pieces in 22 part and color combinations.
LEGO counts 49 pieces. This inventory comes from a separate parts catalog and lists 48; the two do not always count the same elements, so their totals differ. Spare parts are counted in neither figure.
Builders who report a missing piece often find it in one of these places. Tick each one off as you look.
LEGO's request form asks for the set number (8783) and each piece's element ID, both listed above.
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Brick Curved 2 x 2 x 2/3 Two Studs and Lip End
×2
Brick Curved 2 x 2 x 2/3 Two Studs and Lip End with Four White Lines Print
×1
Brick Wedged, Curved 1 x 2 x 2/3 No Studs, Wing End
×6
Brick Wedged, Curved 2 x 3 x 2/3 Two Studs, Wing End
×4
Fairing 1 x 2 Stepped with Two Pins
×4
Large Figure Foot, with Rotation Joint Ball Half [Vertical Side]
×2
Large Figure Mask / Visor, Jayko
×1
Large Figure Torso with Jayko Print (Series 1)
×1
Technic Brick Special 2 x 2 with Axle Hole, Rotation Joint Ball Half [Vertical Side], Vertical Axle Hole End
×2
Technic Brick Special 2 x 3 with Pin Holes, Rotation Joint Ball Half [Vertical Side], Rotation Joint Socket
×2
Technic Rotation Joint Ball Loop with Two Perpendicular Pins with Friction
×10
Large Figure Head, Round Top with Jayko Print
×1
Large Figure Shield Holder with Technic Axle
×1
Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Ball Half [Horizontal Top], Rotation Joint Socket
×2
Technic Brick Special 2 x 3 with Pin Holes, Rotation Joint Ball Half [Horizontal Top], Rotation Joint Socket
×2
Large Figure Shield with Knights Kingdom Jayko Hawk Print
×1
Trading Card, Knights Kingdom II, Jayko - 1
×1
Trading Card, Knights Kingdom II, Jayko - 4
×1
Trading Card, Knights Kingdom II, Jayko - 6
×1
Technic Axle Pin with Friction Ridges Lengthwise
×1
Large Figure Weapon Sword, Jayko / King Mathias (Series 1)
×1
Dish 2 x 2 Inverted [Radar]
1 spare in the box
×1
Tick each piece as you find it, or mark it missing.
LEGO takes requests for pieces missing from a new set through its customer service site. The form asks for the set number and each piece's element ID, the number printed beside the piece in the parts list at the back of the instructions. This checker lists both.
Request a replacement from LEGOMark a piece missing and your list links it to an eBay search for that part, which also covers pieces from older or second-hand sets.
Copy or download your missing list (the CSV opens in any spreadsheet), or print the whole checklist and tick pieces off on paper. Your marks stay in this browser, so you can check a big set over several sittings.
