whats the best 450r carb to use on a 400ex

[odog]

what do u guys suggest for a carb i have a 460ex stroker

[zrpilot]

Originally posted by odog
what do u guys suggest for a carb i have a 460ex stroker


Originally posted by Needmorehp
How do they perform? Does anyone recommend one? If so what mods did you do, and the performance.

I stated this in an erlier thread, but it is woth repeating:

I would use the '04-'05 450R carb instead. Her are my reasons:

1) Price. $170 for a NEW, geunine HONDA 450R carb
2) Sucess. There are hundreds (really!) of others on this board that have used the 450R carb successfully.
3) Help. See above, but ask a question, read the stickys, there is ALOT of help for the 450R carb on the 400EX
4) EASE. IT is an easier carb to work with, IMO.

Here is a link to my 450R carb installation that shows you how, with some pictures!!!!

My 450R carb install (http://www.exriders.com/vbb/showthread.php?s=&threadid=314423)

[dunatic]

41mm FCR is my choice

[n811]

Yup. The 05' carb. I had it on in 1 hr. I cut the inlet boot at an angle to get the thing to fit over the whole carb. It was easy and WOW! a GREAT improvement. I did change my pilot screw though. Also the "choke" is not easy to use. I only want it in the freezing cold to start it the first time though. I can get to it with the seat off. I love this mod. Zrpilot's pics helped out alot. If I had to rate this mod, I would do this as #2 after putting on a aftermarket pipe.

[dariusld]

Originally posted by n811
Yup. The 05' carb. I had it on in 1 hr. I cut the inlet boot at an angle to get the thing to fit over the whole carb.

Are you talking about the filter side or the intake manifold. You should be very careful with the manifold, you don't want a leak there.

[odog]

i see people saying that the 06 and up carbs are better the 39mm ones but since i have a 460 kit i was wondering would the 04-05 be better since its 42mm (i heard) or is the new trx 40mm one better or is the yfz one better and witch carb is the 41mm what bike does it come on. thanks anyhelp would be greatly appreciated

[zrpilot]

Originally posted by odog
i see people saying that the 06 and up carbs are better the 39mm ones but since i have a 460 kit i was wondering would the 04-05 be better since its 42mm (i heard) or is the new trx 40mm one better or is the yfz one better and witch carb is the 41mm what bike does it come on. thanks anyhelp would be greatly appreciated

I still think the '04-'05 450R carb is the better choice

Just my $.02

[Sanddraging28]

My choice is the 04-05 450r carb. the 06-07 450r carb is a FCR carb. to much of a pain in the *** to make fit(too tall)..i have had strokers with both style carbs and i also have a edelbrock carb on a 416. all are good carbs but when it comes to ease of instillation you cant beat the 04-05 carb. your bike will run better with the FCR off 06-07, but not easy at all to make it fit. i had a 465 kit from duncan and i ran the FCR. that bike hauled. but i have a 04-05 on my new 500ex because you can pour more fuel with this carb.

these are just some things that i have found out while building these drag racing quads. i hope it helps