New Pipe and Silencer

[cr1254fun]

Just bolted on a FMF Gold Series Fatty pipe and Turbine Core 2 silencer to my sons 2004 CR85. Was wondering if anyone knew if the jetting has to be changed when you change these from stock? There is no recommended jetting standards that I could find for the 2004.

Help!!!

[CR-FLAVOR]

call FMF directly or go to their website, they have jetting specs online

good combo, i run factory fatty and turbine core 2 on my rides

[CR-FLAVOR]

ahhh... i didnt notice you said 2004

i had to call them to get info for jetting my 2004 cr 250

[cr1254fun]

can they be run without changing the jetting and not damaging the engine? just called FMF and they recommended changing clip position and pilot jet(is that the same as the slow jet?)

[Faded]

Originally posted by cr1254fun
can they be run without changing the jetting and not damaging the engine?

It is possible, but it's best to make sure that your jetting is optimized so that you get the most out of your new pipe and silencer combo. It's also possible that it can run lean and cause engine damage.

Originally posted by cr1254fun
...just called FMF and they recommended changing clip position and pilot jet(is that the same as the slow jet?)

Yes, pilot can also be refered to as the slow jet.

[Mr.Boof]

it wont damage unless u start noticed fouling of the spark plug

[Hondarider1350]

if the bike is running bad you should call fmf

[Z mann R2]

will a FMF pipe work with the factory silencer? or do u have to buy a fmf silencer in order for it to fit??

[cr1254fun]

I think the will work, just dont know how it will perform

[Z mann R2]

so can someone help me out on that question? im a little low on $, and have enough to buy a FMF fatty, but not the silencer yet....will the fatty fit on the factory silencer?

[YzRacer#53]

Yes it will.

[Faded]

You could always pick up the phone and call FMF to be 100% sure.