Edelbrock Quicksilver carb on the 426.....

[YZ426FPilot]

Is there anyone out there who runs a quicksilver carb on your yzf? I aquired a brand new one for today free of cost to try out. I did a search but all this XR junk came up, no real solid info for the YZ.

[markvan]

I've been considering purchasing one.... largely to get rid of the bog right off of idle. I still stall it sometimes coming out of a corner or just coming on to the gas.... A new carb should fix that, so post a reply of your results!!

[sirthumpalot]

Search for a post by YZFan. He used an Edlebrock on his 400, I don't know which model Edlebrock it was though.

[Hick]

I've been considering purchasing one.... largely to get rid of the bog right off of idle. I still stall it sometimes coming out of a corner or just coming on to the gas.... A new carb should fix that, so post a reply of your results!!

Damn. A new carb to fix a glitch like that? I dunno....

I only have secondhand experience w/ this carb in a friend's XR4. It carbureted okay w/ some effort, I suppose that goes for any carb. I thought the design was overvly simplistic, OTOH that was probably its main benefit.

I can see getting one for free, or very cheap, and wanting to try it on my YZF, but the FCR, as far as I can tell, sets the standard for performance carbs, dirt singles or on the street.

I would say that if you can't find a way to fix the setup problems w/ the FCR as delivered, and I realize there are problems, I don't see how you are going to fare any better w/ an Edelbrock. For one thing, all the issues w/ the FCR in the YZF have been dealt w/ here and in other places, and, well, on one hand we have the dominant supplier for peformance motorcycles, on the other the leader in aftermarket automotive fuel systems.

Edelbrock, or Keihin??

Disclaimer: After trying an Edelbrock, and easily being able to set it up for my 67 Camaro, I may never run a Holley again. But I would never put one on my motorcycle if I had an FCR to try instead.

[Hick]

Disclaimer: After trying an Edelbrock, and easily being able to set it up for my 67 Camaro,

I should add that the carb mentioned above is, AFAIK, a Carter AFB knockoff that Edelbrock bought the rights to.

[sirthumpalot]

Read the last post here:

https://www.thumpertalk.com/forum/showthread.php?t=156626&highlight=edlebrock

[Satch0922]

I am sitting here wondering why people are still complaining about "bog" issues. For the past 3 years I have ready 1000 post on this and 4000 replies on how to fix it.

I never had a bog issue on my 426.

[sirthumpalot]

On the older models, especially the 400's, the carbs were not as good as the later bikes and my understanding is that the bog issue was often more pronounced and more difficult to cure on those models.

[Satch0922]

On the older models, especially the 400's, the carbs were not as good as the later bikes and my understanding is that the bog issue was often more pronounced and more difficult to cure on those models.

true but a 5-7 year old bike is not gonna be perfect LOL

[Hick]

On the older models, especially the 400's, the carbs were not as good as the later bikes and my understanding is that the bog issue was often more pronounced and more difficult to cure on those models.

The carb is still essentially the same across all these models.

I know they won't swap, but it is still a Keihin FCR w/ an AP and a bunch of brass jets etc...

So I would quibble w/ that and say that the jetting and AP settings were improved over the years to the point that you don't see 100 jetting or AP threads anymore.

Oh how I miss the good old days.... ?

[markvan]

In all honesty, I really do like the FCR..... as to my problem with bog, If you can come onto the gas and get it moving, I can't really complain. The biggest complaint I have is when you chop the throttle off idle, the 'bog' actually will stall the engine. If it doesn't stall, no problem. I have no complaint's of the power coming from my bike, it just really sucks to have it stall out when I hit the gas too hard...

[Hick]

The biggest complaint I have is when you chop the throttle off idle, the 'bog' actually will stall the engine. If it doesn't stall, no problem. I have no complaint's of the power coming from my bike, it just really sucks to have it stall out when I hit the gas too hard...

Life is too short to put up w/ a jetting glitch. What have you tried as far as carb adjustments to address this?

Is the carb stock? Stock brass, stock A/P? Is Ontario at sea level?

If you answer "yes" to all above you may be a little lean on the pilot and needle, and most of these bikes have an overly generous A/P, especially before '02 model.

All of this is very well documented on this message board.

[Chazlom]

I use the Edelbrock on my YZF470, I have had it for a little over a year. It came out of the box set up perfect for the bike and very easy to install. No choke, no hot start, no TPS and hot or cold it starts right up.

I have experimented with different needles and my runs best with the richest needle of the three that come with the carb.

I went with the Edelbrock Quicksilver after I had so much trouble jetting the Keihin FCR with all the mods on the bike. It runs so much better than the stocker.

[cooracpro]

I bought a used Quicksilver carb from a guy in Washington,put it on my 2000 YZ426F and at first I hated that sumbitch!! I then called Rob at Barnums and explained my displeasure to him,he was very patient and took some time and explained the complete setup and operation of the Edelbrock Quicksilver Carb.

I did what he told me to do with it and went out riding ,my bike has never performed better!!! This thing kicks ass!

Nice thing about this carb here in Utah is that sometimes we start riding at 4200 feet and end up somewhere around 12000 feet,the jetting can be changed on this carb in about 20 seconds,with the twist of a knob.

[buick]

Been running the Edelbrock now for almost 2 years, awesome carb and makes my 99 400f run like a beast for a 7 year old bike.

[crazyal426]

DSP power now $92, Boysen quick shot, $89, JD jet kit $52, Air mixture screw about $20. That is about $253 if you do all the mods not including shipping on all the parts. $350-$400 for the Edelbrock and its a for better upgrade than keeping the FCR. You get what you pay for.

[Wyatt]

Grayracer said they are no good.....so that must be true.

[grayracer513]

Grayracer said they are no good.....so that must be true.

Please provide the quote where I specifically said that, if you will.

[Wyatt]

Calm down gray just poking at you a little bit. They have been around for years and several guys on here have had good luck using them a few years ago. Open your mind to the fact that others may have experience with something that you don't.

I have never seen one in person or know anyone that had one, but they did look interesting. I have had good luck in dialing in the FCR. If I remember correctly, they were relatively inexpensive compared to a replacement FCR.

Interesting point brought up by Hick. I remember the good ol days as well. It seemed that every other thread was about jetting and how to get the 426 to mix right. These things really have come a long way in a short while.

Now that we all know how to jet a carb, the threads of the future may be on fuel injection maps.

[grayracer513]

Calm down gray just poking at you a little bit. They have been around for years and several guys on here have had good luck using them a few years ago. Open your mind to the fact that others may have experience with something that you don't.

I have never seen one in person or know anyone that had one, but they did look interesting. I have had good luck in dialing in the FCR. If I remember correctly, they were relatively inexpensive compared to a replacement FCR.

I am not the one who keeps suggesting that I know everything.?

And as to carb prices, how does that make sense? Company A is a mid sized business overall that makes speed equipment and sells a relative few aftermarket carbs of whatever quality level (apparently acceptable to many) for a semi-reasonable price, while company B mass produces thousands of units for major vehicle manufacturers and somehow can't sell them for less than $800 each. Go figure.