why does ace valkyrie never burst almost everytime?

Probably due to it's two monster teeth.

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Beyblade Theory Combos:

Spoiler (Click to View)

Twin Nemesis 0Turn Xtend
Geist Fafnir 7Wall Merge'
Dead Phoenix 13Expand αnchor
Buster Xcalibur 1'αngle Operate
Ace Valkyrie 10Dagger Reboot' Sen
Bloody Longinus 11 Tower
Geist Fafnir Nine Quest

The list will be updated

Now, for some words of wisdom from Nam (me),

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• There is no such thing as a bad part... except for Blow, Blow' and Sword
  
• You dare not even put Impact in the same category as those above. Impact is the worst of the worst, not even worth the title "Bad Part"
  
• Theory combos might be unexpectedly good if you just give them a try or two.
  
• Theory is love, theory is life.
  

why does ace valkyrie never burst almost everytime?

Probably due to it's two monster teeth.

That plus recoil of Ace is lesser than Slash, based on observation. Meaning that it also has less self-Burst risk due to lower/lesser recoil potential.

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Ore wa tsuyoi da

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