Interesting, and I'm interested! How does it attach to the flywheel? What is the brand/where do you purchase? Give a ride report and tell us how you like it!
Motocenteraz.com
Not really any downsides.
Like this and jetting:
40pj as 1.25
NEDW#2
170 mj.
Stock fmf gnarly pipe and fmf
Long Titanium silencer.
VP C9 Ravenol motocross synthetic 50:1