Cherished Ignition Key

Upgrade	Effect	Sell value	Magic Powder
+0	+3% base speed · 1 Revive with 30 HP	15,834	160
+1	+3.2% base speed · 1 Revive with 32 HP	16,464	163
+2	+3.4% base speed · 1 Revive with 34 HP	17,262	168
+3	+3.6% base speed · 1 Revive with 36 HP	18,228	174
+4	+3.8% base speed · 1 Revive with 38 HP	19,362	186
+5	+4% base speed · 1 Revive with 40 HP	20,664	199
+6	+4.2% base speed · 1 Revive with 42 HP	22,134	212
+7	+4.4% base speed · 1 Revive with 44 HP	23,655	273
+8	+4.6% base speed · 1 Revive with 46 HP	25,332	340
+9	+5% base speed · 1 Revive with 50 HP	27,165	414

Extracting this Treasure returns Magic Powder. The amount is fixed per Treasure and upgrade level — it does not depend on which ingredients were used to evolve it.

Bravo! With this key in hand, you're officially the bike's one true, perfect owner!