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Old 01-04-2011, 09:53 AM   #21
yeoljb
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Quote:
Originally Posted by bluewave18 View Post
off. Bottons are too close together and I don't proof read.
It shows....
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Old 01-04-2011, 09:55 AM   #22
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Fixed it. I'm on my phone and I don't have Firefox to catch that for me.
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Old 01-04-2011, 09:56 AM   #23
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Quote:
Originally Posted by FLYIN'DUC View Post
I am old and have had many bikes and cars with carbs and efi is the way to go, they dont clog up with todays gas, I have worn carbs out pulling and cleaning them, major pita
Yep, and sorry, carbs are not "simpler" then EFI. Non-feed back EFI is real basic and simple and even feed back, sequential EFI is pretty easy.

Like I said even basic, speed density EFI adapts to air density changes better then carbed bikes, and once you throw the we call gas today
in them....



(that being said I do rock a carbed bike, not by choice but because it is
what it is...)
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Old 01-04-2011, 09:59 AM   #24
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Can I get EVI for my bike????

Wait.....I don't have a bike anymore! it!
You still got the Scooter!!!
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Old 01-04-2011, 10:09 AM   #25
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You still got the Scooter!!!
I forgot about that! I am still a "biker".
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Old 01-04-2011, 10:10 AM   #26
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Kinda reminds me of Dumb and Dumber. " I get 50 MPG on this Hog"
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Old 01-04-2011, 10:26 AM   #27
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Kinda reminds me of Dumb and Dumber. " I get 50 MPG on this Hog"
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Old 01-04-2011, 10:33 AM   #28
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I'm spoiled. I like the EFI. I've had carbed bikes and actually have a couple now. Carbed bikes tend to gum up if you let them sit for any period of time. As long as you ride it regularly you wont have a problem. And once they're tuned right you're good to go. As far as altitude changes and that stuff, if you know how to adjust the air and jet screws you'll be fine.

I think the ethanol in todays gasolines tend to make the carbs gum up sooner. I seem to hear more complaints now about carbs gumming up than ever before. Some feedback on that would be interesting.

Make sure that you put Sea Foam or other fuel treatment in the tank if you know it's going to be sitting for any period of time.
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Old 01-04-2011, 12:20 PM   #29
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When tuned a carburetor can provide the optimum fuel atomization and volumetric efficiency. Unfortunately this is at a specific laundry list of parameters all being at their optimum value for the tune at the same time. These include; barometric pressure, air temperature, engine temperature, stoichiometric fuel air ratio, cleanliness of the air filter, fuel pressure (in pumpless bikes this would be fuel level for hydraulic head pressure), engine RPM, throttle position, load, etc. etc. You will never have this perfect combination in real life and it will be a compromise. EFI can compromise better throughout conditions and although its peak will be lower than a perfectly tuned carb your general experience will be better on EFI. And this is without the ethanol gunking up the carb tuning.

That being said I have never owned an EFI bike so YMMV. Both EFI and carbs will bring a smile to your face and, probably, be able to out perform your ability. To me suspension, chassis and tires will affect performance way more than whether the bike is carbureted or EFI (with the exception of ethanol chit).
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Old 01-04-2011, 01:40 PM   #30
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Carbs suck. If you disagree, you are probably a finicky, proud, resourceful, set in your ways, grumpy old shade tree mechanic.

EFI bikes can be ridden hard, parked, and started with ease 1 yr later. Carbed bikes will require 3-5 hours of work to get going again. It's all about having the fuel in a closed versus open system. Even if a carb can perform 5% better than EFI, the benefits of EFI allow a new bike to run for 100k+ miles without ever having the fuel system touched. Especially true with todays crop enriched "gasoline".
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Old 01-04-2011, 02:33 PM   #31
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Old 01-05-2011, 12:05 PM   #32
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Carbed.
While EFI is great, the thing I like about carbs and motorcycles in general is, simplicity.
With EFI you have a fuel pump, pressure regulator and injectors, all of which are pretty high tech. If something goes wrong with them they can leave you stranded and repairs can be expensive.


So, ummmm, how many people have posted up about having a probleme with an EFI bike in the last year?

Buehler?? Anyone?? Buehler???

Compared to the precision of EFI a carb is a semi-controlled fuel leak...
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Old 01-05-2011, 02:07 PM   #33
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Compared to the precision of EFI a carb is a semi-controlled fuel leak...
I LOL'ed...

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Old 01-05-2011, 03:09 PM   #34
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We should go back to steam engines, because fuel based engines are just a more complicated version of steam engines, they are infinitely simpler and easier to repair and work on.


EFI hands down.
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Old 01-05-2011, 04:24 PM   #35
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Being a finicky, grumpy old shade tree mechanic I will agree that EFI has it's advantages but the disadvantages of carbs are not as bad as this thread would indicate.;
I went to 12,500ft about 4 months ago and my bike ran just fine. Even did a small wheelie, just to see if I could. Sure power was down from sea level but still ran good.
Yes, crappy gas has more of an effect on carbs but like I said, if your fuel pump, pressure regulator or injectors go bad, you aint limping home. I can pull the float bowls off and maybe get a couple cylinders running enough to get me somewhere.
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Old 01-05-2011, 05:34 PM   #36
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^^What you said has weight (if you are mechanically inclined)^^ That being said, I have never owned an EFI bike. However, there is less headache and quite a few benefits to EFI that are the foundation of why sportbikes are rarely carbed anymore.

1. No choke, fire it up and go (wait for fluids to get pumping)
2. The ECU can adapt to riding conditions (temp, altitude, and general deliver)
3. Tuning is much easier especially if you have more than 2 carbs
4. MOST of all you don't have to worry about this fuel

I have never had to worry about the carb gumming issue until this year, and now it seems weather is affecting it as well. If EFI is the answer to this solution then you are better off with it. However, I will never sell my bike (It will be a classic by the time my son is riding it!)
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Old 01-05-2011, 08:01 PM   #37
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Lots of good information on this topic. I do see some of the passion for both and I learned some things so thanks. Given the recent post about a project bike that is all carbed I would almost bet any of us would want to have that regardless of the fuel delivery system.
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Old 01-05-2011, 08:11 PM   #38
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Todays bikes are being equipped with dual injectors. That gives even more room for possible tuning options.
Look at it this way. I can decide I wanna run race gas. I tell the Bazzaz what AFR I wanna run. I make a trip around the block. The system sniffs the exhaust as I ride,I then tell it to accept changes with the lap top to the percentages of fuel (per RPM and TP)needed to hit target AFR.. Done. Let's say today I wanna spray a 50 shot. Go to map 2 and set the AFR for what ever. A few hits and its ready to accept the changes. I run it at the track and it changes maps for me. I leave on the street tune. When the nitrous is triggered a relay flips the maps to add more fuel on the secondary injectors. The nitrous map is only on when the is spraying. You cant do all that with a carb bike.
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Old 01-05-2011, 08:27 PM   #39
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not sure what people are smoking to say that efi runs todays gas better.....

We do way more efi water repairs at the shop than we do carb cleans these days. Most of them don't even get out of the gas station parking lot where they fueled up.

Ethanol absorbs water & when a gas station gets low on gas they tend to pump some water. A few drops in an efi bike will stop it dead. Carbed bike will stutter & may die as well, but taking a screwdriver & draining the bowls is a heck of a lot easier than having to disassemble and blow air through the injector screens & fuel rail.
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Old 01-05-2011, 09:36 PM   #40
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