04 need some help,motor,jet,axel,chain roller

[blaster12s]

what is that mod that we have to make to the motor so no oil blows out and ruins the motor...i think its called a compresion relice valve..what should i do about that..
hmf pipe. motor stock.. what jetting should i do
would an aftermarked durabule axel for a roundhouse carrier fit in the stock carrier
and what should i do abut the stock chain roller cuz they rub when i jump..should i remove it or what should i do
thanks for all your hellp!!!

[MR4Engine202]

your talking about on the 04/05 heads....the decompression plug is a separate piece and sometimes comes out....the only way to 100% fix that is to get a 06 up head and that plug is a cast part of the head

[blaster12s]

ok thank you...anyone else have some answeres for the ohter stufff?

[02bwraptor]

On the chain roller there is a kit to move the upper roller higher than stock position. It is called Yamaha YFZ450 Upper Chain Roller Relocator.

[02bwraptor]

decompression plug http://www.google.com/search?sourceid=ie7&q=Decompression+Cylinder+Head+Plug+Yamaha+YFZ450+Y FZ+450&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&rlz=1I7TSHB_enUS330US330 type in Decompression Cylinder Head Plug Yamaha YFZ450 YFZ 450

[blaster12s]

thanks and do we neeed to run a roller and if i dont replace it and do big jumps on mx will it break my chain??

[02bwraptor]

The locator uses the stock roller. I don't know about breaking a chain but it does put stress on the chain.

[blaster12s]

o i know that lol
but if i was not to get the relocator kit could i just take the roller off?

[02bwraptor]

I wouldn't recommend removing the roller.