Power coils for the Tri-z

[Just-Tri-It]

What different power coils are available for the Tri-z for extra power. I have heard that there are more powerful internal ones to add but haven't seen them. Are stock the only ones available?
Thanks

sheeptender

[honda250sx]

Huh power coils?

Terminology?

If you are refering to the stator. Yes you can get your's rewound by ricky stator. But it does not provide "extra power".