Big fin head mod

[oste]

Hi, I'm looking to get an xrsonly big fin head mod done to my honda 440ex. Anyone have any experience with one of these conversions? Are they worth it? They claim it lowers temps up to 30*F.

[TC426EX]

I think it would help for sure with airflow but I would be skeptical about thinking it would lower it 30 degrees.

[Juggalo]

theres a guy on here who has it done to his bike. i think its oldnumberseven but i'm not positive on that one. he said it works a little too well!