Upgrade Cores

Introduction
Upgrade Cores are a type of Core used for increasing stats on armor, weapons and bikes. The +X after the name of an item indicates how many times it was successfully upgraded. Eg, "Titanium Blade +4" has been upgraded 4 times.

Usage
If you've never used an Upgrade Core before, you are best to practice with an Upgrade Core(Low). Be aware that the stat requirements of the item will increase when you upgrade it.
 * 1) Unequip the item you are upgrading
 * 2) Left click on the item upgrade button in your inventory, and insert item and Upgrade Core (Low)
 * 3) Left click on "Item Upgrade"
 * 4) If successful, the item will now be +1 (or more depending on the original grade of the item), in a very few situations, the item is upgraded with +2

Core grades
There are 4 grades of Upgrade Cores. Each grade is used to upgrade different grade of gear and weapons:

Chance of failure

 * When failing an item upgrade the item is never destroyed however its upgrade level may drop by 0, 1 or 2.
 * Using Enhanced Cores exclusively guarantees a success chance of 100% but only to +6. Beyond that, when using enhanced cores exclusively the item level may drop no more than 1 if the upgrade fails.
 * Perfect Cores guarantee 100% chance of upgrade at any item upgrade level. Only 1 perfect core is needed regardless of the number of cores needed to upgrade.

Stat additions from upgrading
See: Upgrading Astral Bikes for stats added from upgrading Astral Bikes.