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xr500_89

Mikuni or Edelbrock

25 posts in this topic

well its time to decide on a carb for my Xr600R mikuni seems to be a good carb for the money but is the edelbrock that much better any help would be awsome, and i need actualy spec stuff like why one is better than the other not " i run the edelbrock and thats awsome" thanks in advance.

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I've tried both, decided on the Edelbrock. Reasons: Simple straightforward design; no jetting hassles once the correct needle is selected, only minor external adjustment is needed to compensate for altitude/ambient temps; easier starting, both cold and hot or after a stall/fall; better fuel economy; more even power delivery throughout the RPM range. I have used the same Edelbrock on two stock XR600s, an HRC XR628 and modified it for my '00 WR400 on which it is currently installed, works great. Not bad for a carb that is six years old and has many, many hours of use. I have had to repair it recently, replaced all the gaskets and O-rings and the float valve.

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so edelbrock is that much better that you would pay the extra 150 bucks cause i did not skimp anywhere on this engine and i dont plan on doing it with the carb but i dont want to spend extra money if i dont have to, the mikuni seems like a good carb but is the edelbrock that much better. If this is as good a carb you say then i'll just have to wait another week to get the edelbrock.

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Yeh, I will spend the extra cash every time for the Edelbrock. However, more opinions will help you make the right decision for your situation, I'm sure that there are others that will tell you that the Mikuni is the hot setup. Get some more input.

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I have been very happy with my Mikuni on the XRL. It made all the diff every where from starting to high speed.I have heard the edie is easier to tune once its on the bike and the proper needle has been selected great for changing altitude but I make do and its way better than the stocker.

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hmmm well i dont plan on too many alttitude changes but there will be some i want maximum peformance but life as well hmmm i guess i'll just wait for more posts

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If you had a XR650R, I've got an extra 100% brand new Edelbrock pumper carb kit sealed in its factory box that I'd let go for $369.99 + shipping. Unfortunately, I don't think the carbs between the XR600 and XR650R are interchangable.

I don't know how much you can get the Mikuni for, but it's not a bad choice, especially if you can get it brand new for $150 cheaper than the Edelbrock. Just make sure it's a complete kit, otherwise you may be adding up additional costs in adapters, jets, possibly new cables, etc.

One of the main advantage to both cabs is the accelerator pump, which improves off idle throttle response when you give your bike a handful of throttle from a low RPM. If you're old enough to have lived in the muscle car era and were into cars, then you'll remember that cars such as Camaro's, Firebirds, GTO's, Shelby's, etc, had carbs with accelerator pumps on them and tuning the pump was critical for that crazy instant off the line acceleration or that instant throttle response when you mashed the pedal to the metal as opposed to the engine hesitating or bogging. Today's cars also have accelerator pumps, but they're built into the computers fuel maps instead of having a mechanical pump like many of the muscle cars had.

All the performance 4 stroke bikes made for the last several years such as CRF's, WRF's, YZF's, RMZ's, KXF's, KTM, etc, all have carbs with accelerator pumps, but unfortunately our XR's were not blessed as these other bikes were. That doesn't mean they're bad because the stock carbs on the XR's work just fine, but they won't have the benefits of the pump.

The accelerator pump is another tuning variable when you're having to jet / tune your carb. Too much or too little pump will cause a bog, but get it just right and the throttle response is definitely more instant and more crisp when quickly coming from idle or a low RPM with a handful of throttle such as when coming out of a corner, or when you quickly want the front end to come up because of an unexpected obsticle, etc.

The Edelbrock is easier to tune and it does have a better float / fuel cell design in my opinion because it eliminates flooding should your bike go down, but you've got to figure out how much more these types of things like this are worth to you. If easier tuning, external tuning, and no more flooding upon a fall are worth a lot to you, then maybe the Edelbrock is a better choice for you, but there's going to be people who don't find value in those things and you're going to have people who are happy with either carb.

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well i can get the edelbrock for 369 as you said and i can get the mikuni for 247 yes a full kit from xr's only ( yes i know its a gamble) but if it is the way you say it is the edelbrock will be my choice cause i dont want to spend ever penny i can on the engine and not have a suffient carb to run the bike, but im also aware mikuni makes a pumper carb that i can get from pro-flo for 259.99 and i believe thats a complete kit as well but is only a 40mm but i'll make sure its a kit before i order anything, but it sounds like im gonna go with the edelbrock and just wait the extra week to have my bike ready

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Gut feel tels me the $247 carb from XR's Only will be their 41mm flat slide carb withOUT an accelerator pump. It's a good carb, but if you're wanting a carb with an accelerator pump, make 100% certain it truly has an accelerator pump by either calling and asking them or making sure it says so in the specifications, etc. Usually the carbs with accelerator pumps are $400+ at most shops...unfortunately.

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Gut feel tels me the $247 carb from XR's Only will be their 41mm flat slide carb withOUT an accelerator pump. Usually the carbs with accelerator pumps are $400+ at most shops...unfortunately.

This is right, the 41 mm Mikuni you are talking about does not have an accelerator pump, if you look further, XRs Only has a Mikuni FCR kit for the XR600, it is $525.00. Just for the record, I removed the stock FCR from my WR400 because I couldn't get it jetted like I wanted (could be due to ignorance) put on the Edelbrock , the bike starts better, has better throttle response, pulls harder and on a recent dual sport ride, went 85 miles on 1.5 gallons of gas, wasn't taking it easy either.

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oh yeah i knew it didnt have an accelorator pump thats why i was asking for a comparison but the carb from pro-flo is a little bit more as i stated and it does have an accelorator pump but is only a 40mm

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well i decided to call pro flo and found out they have a 40mm mikuni with acceloratpr pump for 259.95 shipped so i think im gonna gave to go with that mikuni has never let me down on our ski's and for the price i think its the right way to go thanks everyone for your input keep it coming as it might change my mind...

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This is right, the 41 mm Mikuni you are talking about does not have an accelerator pump, if you look further, XRs Only has a Mikuni FCR kit for the XR600, it is $525.00. Just for the record, I removed the stock FCR from my WR400 because I couldn't get it jetted like I wanted (could be due to ignorance) put on the Edelbrock , the bike starts better, has better throttle response, pulls harder and on a recent dual sport ride, went 85 miles on 1.5 gallons of gas, wasn't taking it easy either.

You must be crazy :ride: Everyone in the DRZ400 forum knows that the FCR is superior to the Edelbrock. Just ask Eddie (aka Burned). He is the moderator for the jetting forum. He has done alot of dyno work with both carbs. He put an FCR on the thumpertalk build-off bike.

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You must be crazy :ride: Everyone in the DRZ400 forum knows that the FCR is superior to the Edelbrock. Just ask Eddie (aka Burned). He is the moderator for the jetting forum. He has done alot of dyno work with both carbs. He put an FCR on the thumpertalk build-off bike.

Whatever makes your clock tick. You run the FCR, I'll stay with the Edelbrock.

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yeah and i'll run the mikuni as well more cost efficient to me it seems, not to mention its alot cheaper and mikuni has never let me down.

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This is right, the 41 mm Mikuni you are talking about does not have an accelerator pump, if you look further, XRs Only has a Mikuni FCR kit for the XR600, it is $525.00. Just for the record, I removed the stock FCR from my WR400 because I couldn't get it jetted like I wanted (could be due to ignorance) put on the Edelbrock , the bike starts better, has better throttle response, pulls harder and on a recent dual sport ride, went 85 miles on 1.5 gallons of gas, wasn't taking it easy either.

sorry but last i checked there wasnt a mikuni fcr kit theres a keihin fcr kit, and i think now that im gonna get the edelbrock now since i noticed the kits pro-flo has arent made for specific bikes so edelbrock it is

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sorry but last i checked there wasnt a mikuni fcr kit theres a keihin fcr kit, and i think now that im gonna get the edelbrock now since i noticed the kits pro-flo has arent made for specific bikes so edelbrock it is

You're absolutely correct, sorry for the slip-up. :ride:

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Whatever makes your clock tick. You run the FCR, I'll stay with the Edelbrock.

It's not just what makes my clock tick. Do a search on Edelbrock in the DRZ400 forum. There are dyno graphs to prove my point. Ask Eddie the Jetting Forum moderator and engine tuning guru. Your bike is not running to it's full potential with the Edelbrock on it. Think about this, there are alot of pro bikes running the FCR carb. How many race bikes (MX, enduro, or otherwise) are running the Edelbrock? If your FCR fits a DRZ, you can get alot of money for it by people who have a DRZ400S (it comes with a CV carb). Just read this: http://www.thumpertalk.com/forum/showthread.php?t=326332&highlight=edelbrock

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