trx250x roost boost! oldskool power advancer

[XR200R]

asking $75 shipped, gives bike some more kick!

[TheRealFatShady]

Any pics, what exactly is it? And have a good 250x cylinder and piston?

I don't know if 300ex pistons interchange as the stroke was different, and the wrist pin location may be different.

PS - Are you 'SWINGIN's brother?

[XR200R]

The "Roost Boost" by Answer Products was an electronic device put in the
electrical wiring before the spark plug. It was supposed to reshape the
charge and change its ignition timing so as to provide a boost in power by
making a cleaner and faster burn in the cylinder.

$75 shipped.