How many different carbs for the 400EX?

[BEAVER.989]

I'm wondering what all of the options are. I know about the 450R carb. I've also heard of the Edelbrock and Mikuni 36mm Pumper. I also know Sparks sells a 39mm FCR.

Am I missing anything?

[GPracer2500]

Lectron

http://www.pricepower.net/gallery/albums/userpics/10001/normal_LECTON%20CARB.jpg

[BEAVER.989]

The 450R upgrade seems to be the most popular here, by far. I'm sure this is because it has the best price/performance ratio.

Price aside, are some of the other choices any better performing?

[riotact]

They say the Edelbrock carbs arent to hot.

[BEAVER.989]

The guys over at XR's Only swear the Mikuni is the best improvement you can make to an XR or EX, while Sparks says their FCR is all that and a bag of chips.

I was just curious to hear some unbiased opinions.

[matt14c]

I used to have the FCR 39 and that was a great carb once it was tuned properly! I believe there is an FCR 41 also for like 440+. Before I had bought the FCR I was looking into the Edelbrock and there were many more people unhappy with them as oppossed to those who liked it. Dont remember the reasons though. I have the 450r carb now but havent used it yet so not sure on performance and tunability, but it seems like 1/3 if not more of the users on this site with 400's have the 450r carb. I think I have only seen one person say it wasnt worth it or any good other than that seems to be liked by all.

[droppedmazda]

39mm fcr carb is one of the best your gonna get. we have dual 39mm fcrs bored to 41.3s on the raptor that i race and we like them alot. i don't know much about the 450r carb but i wouldn't run a lectron in the woods. they're hard to keep in tune and the woods or mx track would knock it out of ajustment pretty quick.