2006 yz450f rocket exhaust

[jorgefgr]

It´s a 250f not 450f!

[twisted127]

Doesn't help that his header has a giant dent in it causing more back pressure

[jasoncherryy]

check out my bike...it has rocket exhaust and it is sweet

[DirtbikesRfun2ride]

Check your valves bro..



[ktmrider53]

@DirtbikesRfun2ride jetting is off not valves.

[mattbarger157]

choke is on.....

[252sampson]

hurts my ears.....

[jms9618]

Lower ur idle or is it just cold?

[jasonttr230]

i want 1

[burmkilla]

rejet your bicycle

[GypsyKiller450]

sounds like a tired old 250f with no exhaust packing left in its muffler..2 thmbs dwn btw revving the piss outa it like that when its cold is extra good for the motor lol

[fukmerunin11]

those back fires are from a rich pilot jet probably.

[Rsxrider44]

@fukmerunin11 yeaa he never rejet it

[huevos50]

header pipe's not lookin too great...

[MrTsmith189]

what did you do to get your exhaust to sound like that

[m0t0cr0ss17]

@MrTsmith189 his gas is shit.. its not high enough octane and it backfires because of that

[jms9618]

@m0t0cr0ss17 explain that theory. Its backfireing because is running rich and needs rejetted. IMO

[m0t0cr0ss17]

@jms9618 it could be either one. but ive hrd if it backfires, is still cold, or the engine kinda clunks its cuss the octane needs to be higher. it could be just cold tho, cuss i said it was uploaded december 8th. so its prolly just cold