39mm fcr

[tchester55]

What all is required to put a 39mm fcr on a warrior? I'm looking at changing carbs because mine has the old dual cable set up and its junk.

 

[Lbswut]

You will need the carb, the correct throttle cable, the correct carb boot, and make sure the air filter will fit on it. Also I am sure you will have to mess with jetting and the other settings to get it dialed it correctly.

 

[YAMAHAULER]

you will need a custom built intake manifold to run the 39mm fcr along with a reducer and then depending on what filter and or box you run that will determine what sizw tube youll need from carb to box or filter

 

[tchester55]

Where could I get the intake manifold? And I currently have the stock box with a uni air filter. Or what is another good carb that would work?

 

[YAMAHAULER]

Gen1Pat makes them give him a pm and you can use your stock airbox and tube but I wanted better air flow
the reducer and blue intake tubing (if you go this route)is on ebay
Pat can tell you what size reducer you'll need and go from there

 

[YAMAHAULER]

if you get a 39mm fcr try to get it with the throttle cable my fcr is from a 2007 yfz450

 

['00 WO-YA!]

1.5" x 1.875 I believe. I.D

 

[YAMAHAULER]

yep I'm using a 1.5" X 2" cause the 1.5" X 1.875" are hard to find

 

[alex456123]

If your trying to throw that on a piped and filtered only warrior you gonna loose power believe it or not.

 

[YAMAHAULER]

yeah you need a built motor to be able to get + power out of the 39mm fcr otherwise you'll just have a really boggy warrior
a good High comp JE or Wiseco piston and a bigger cam along with a mild P&P and you'll see the most power from it

 

[tchester55]

Currently i got a stroker crank and piston. Gonna get head work done soon need to get new valves. What does the +1 intake valve do and does it require any extra work or will it just drop in

 

[YAMAHAULER]

the seat has to be milled for it to fit and seat just allows extra air and fuel through and with a stroker you should have no problem running the fcr talk to Gen1Pat he just built a stroker and is running the 39mm fcr he can steer ya in all the right directions

 

[tchester55]

Alright I sent him a pm. Thanks for everyone's help much appreciated

 

[YAMAHAULER]

anytime

 

[imreallyquick]

Where do you get the 39mm at?!?!?! Ive been looking for a big carb for my warrior but i cant seem to find anything hardly...ive got the 396 kit, webcam, kibblewhite valve springs and a good port job done but im still running the stock carb because i dont know what would be a good carb for it...

 

[duneracerweston]

ebay. 05-08 yfz carbs are 39mm fcr carbs. about half of the elite run them, including myself

 

[imreallyquick]

Would it run good with my setup you think??? What do you use for a carb boot?

 

[duneracerweston]

It will be a bug step up, jetting may be a pain yours not being ported yet. Out of the carbs to choose from, thats the one I would choose.

 

[imreallyquick]

Mine is all ported and everything...i didnt go bigger valves that is the only thing that i didnt do...but was your jetting close?

 

[duneracerweston]

Mine is a full built motor 11.6:1, oversized intake valve, cam, full exhaust, intake, the whole shibang. Jetting is like 190 main and 55 pilot, has a splitter plate in both sides of the carb to help with response out of the hole. Good carb.