drz 400s jetting 39mm fcr

[donnieDRZ434]

hey i have a drz 400s with a 434 kit drz e base gasket drze cams 3x3 mod and a fmf power bomb and power core4. i need to jet the 39mm fcr for these mods any suggestions?

[Noble]

What is the source of the FCR? New, old, type, model?

[Craigo]

For Fcrmx , near sea level

155 main jet

200 main air jet

EMN needle

clip 3

45 pilot jet

no pilot air jet

2 turns fuel screw

For older Slant Body Fcr, as found on E model

155 main jet

200 main air jet

100 pilot air jet

EMN needle clip 3 or stock DXP needle clip 5

45 pilot jet

2.25 turns fuel screw

[donnieDRZ434]

i got the carb off of a drz400e, also i forgot to add that i am at around 2000ft

[timbanditos]

I have the same setup exactly, except still have SM cams, I have the FCR MX and used the jetting Craigo posted, my bike is like a different bike now. Awesome!

[Craigo]

i got the carb off of a drz400e, also i forgot to add that i am at around 2000ft

The listed jetting should be ok for 2K ft....

I would remove the Coast Enrichener as well..

The coast enrichener richens the fuel mixture on deceleration to prevent backfiring...It's basically an air cut off valve that relys on engine vacuum..

The CE over time tends to become inconsistent..It can stick,the rubber deteriorates and can cause jetting issues...

It's excess clutter that your carb can live without...

So after you unbolt it ,Join the 2 ports on the carb with a left over piece of hose and cap the port on the head...http://img380.imageshack.us/img380/318/img1924arrow2oi2.jpg

If it has any bogging issues do the Eddie Mod...https://www.thumpertalk.com/forum/showthread.php?t=890079&highlight=eddie+mod

To make easier pilot circuit tuning I recommend you install a R&D Flex Jet remote fuel screw..http://shop.thumpertalk.com/catalogs/Parts_Unlimited_Offroad_2009/default.asp?p=817

[donnieDRZ434]

OK i think i have read about that some where, if i cap them vrs. connect them don't i have to do a additional step change a jet or something?

[Craigo]

Correct.

[donnieDRZ434]

ok i changed the main from a 142 to a 155 all the other jets where right

also when checking the jets i found that their is another jet (65) beside the main (155) and pilot (45). what is the name for this jet and what should it be?

so now my jetting is

main 155

pilot 45

beside pilot 60

main air 200

the other air 60

the needle is in the 4th notch from the top and has (obdx) written on the side of the needle is this what you guys call (EMN)?

[Craigo]

You would be talking about the starter jet ..leave as is..

The OBDXP is the stock needle that is installed and the OCEMN is the recommended Keihin replacement needle..

[donnieDRZ434]

thanks a lot. i think that i understand every thing now, ill let you know how it goes once im done. is there a certain machine that comes with a OCEMN?

[Craigo]

In the States I believe you can order them from Sudco and I am pretty sure Eddie will have them.....

[donnieDRZ434]

thanks a lot i think that i understand every thing i need now ill let you guys know how it goes when i get everything done. also do you know any machine that comes stock with the OCEMN needle to help find for purchase? once again thanks.

[Craigo]

Just ask for a keihin OCEMN needle...Machine cross reference shouldn't be necessary...

[speedtoad]

I bought my EMN and jets from

www.jetrus.com

They also gave me a sticker for free!

[donnieDRZ434]

OK so i have every thing done now. the bike seems to start and run great. there is a small dead spot when cracking on it in lower rpm, but i believe they say that the eddie safety wire fix on the carb. also i noticed that the header is glowing read near the exhaust port is this normal? or do i need to adjust jetting?

[Craigo]

Is that cracking the throttle when riding or when stationary free revving..?

see post #6 for eddie mod if it's bogging when you riding

Glowing red is normal..