What model of carb do I have...help!

[RCKYMTN99]

Hi all,

I have a 2004 400e (Canadian model) and I want to purchase the R & D power pump but I need to know exactely what carb I have. All my manual says is it is a Keihin FCR39. When I went to purchase the pump the sales guy asked me if it was the FCR or an FCR MX. I have no idea:excuseme:

[hi_im_sean]

Hi all,

I have a 2004 400e (Canadian model) and I want to purchase the R & D power pump but I need to know exactely what carb I have. All my manual says is it is a Keihin FCR39. When I went to purchase the pump the sales guy asked me if it was the FCR or an FCR MX. I have no idea:excuseme:

thats exactly what it is, an fcr39, NOT an "fcr mx". i have the same one, also known as a "slant" style fcr. but as far as the sales guy is concerned its just an "fcr" and a 39mm one at that

[RCKYMTN99]

Cool.....?

Any differences between the accelerator pumps on the two models? Like how the fuel is routed and so on.

[Erik Marquez]

Cool.....?

Any differences between the accelerator pumps on the two models? Like how the fuel is routed and so on.

Yes the AP is one of the bigger changes between the FCR and FCR MX

[Noble]

RCKY - Why would you want a R & D power pump? You already have more AP than you need. The mod for that carb is to reduce AP time to 1 to 2 sec duration. It is about the only AP control you have. The FCR MX has many more tuning adjustments: timing, leak jet, duration, etc.

[Wayward Son]

im not sure they make the power pump (adjustable leak jet) for the non fcr-mx carbs............

[RCKYMTN99]

I have an off idle bog situation and am looking for a more snappy throtle response. It has been like that since new and after re-jetting. I just installed the zipty extended fuel screw and figured since I had the carb off I would try an after market accelerator pump. I thought (according to advertising) it would cure my problem. ?

[Wayward Son]

checked,does not exist for your carb.

search "taffy mod".

[RCKYMTN99]

Eddie, your right. That's why I wanted to know exactly which carb was on my bike.

[RCKYMTN99]

Awsome.......Thanks for the help fellas.

Eddie, I will check out taffy mod. Thanks again

[RCKYMTN99]

Sorry for my ignorance but will adjusting my fuel screw have any effect on off idle bog?

[Neil Claydon]

Fuel screw may or may not help your problem.

First try this.

But probably more important to get the taffy mod done and adjusted.

If carb is still off the bike, do the taffy mod first.

Neil. ???

[DrzDasher]

doesn't the diaphram from the ap on the crf450 solve this problem as well?

[hi_im_sean]

checked,does not exist for your carb.

search "taffy mod".

dam thats too bad i wanted to put an adjustable leak jet on my slant carb.

that doesnt make sense at all. they make an adjustable leak jet for a carb that already has plenty of AP adjustments, but they dont make one for the carb that needs it the most ?