need YZF600R carb swap info...

[match417]

I just bought some yzf600r carbs..2004, 11k miles on the odo..off a wrecked bike. I know there are people here with yzf600 carbs on their bikes, I just want to know what i should look out for, if anything, or is it just plug-n-play. I know I have to set up the air induction to be how it is on the YZF600, and split off the coolant tubes so coolant can route through the carbs. Anything else i should know? I'm about to dig through my yzf600 wiring diagram, but anyone know what the 3 prong plug is hanging off of the side of the carbs?

[shredex]

i didnt know you could do a yzf carb swap....thats awesome..

[match417]

kindof, you have to force the carbs into the little manifolds, but it can be done. They have to be set up like they are from the factory for the bike to run like it is supposed to, my friend didn't have his air tubes on or this other little tube that seemed pointless, still dont' know what it does. all of that stuff was off of it when he got it, and it performed like my bike, but once we put that stuff back on, it ran GREAT, somehow yamaha setup the carburetors to handle ram air with some kind of pressure equalization setup to normalize the pressure when it goes into the carbs. I've been trying to figure it out, and I can't, maybe someone can further my knowledge on this. From what i've learned about carbs, the fuel isn't forced in, it's sucked in by the slight hourglass shape of the carbs via Bernoulli's Principle, the same thing that makes planes fly. It's kindof like an hourglass, but only flares out on one side. In the middle of the "half-hourglass" (aka venturi, pictured below) the air is sucked in at a greater velocity causing a slightly greater inward pressure on the walls of the narrow diameter section of the carbs, if a little port is drilled out in the middle of the venturi then whatever is on the other side of the port is sucked in. In the carbs case, it's fuel. After that my knowledge on this stuff gets a little hazy and i'd probably need a masters in physics. It's funny, i learned more about how carburetors work while learning about exhaust flow physics...

[shredex]

I know its sucked into it...
a fuel injected bike has the fuel sprayed into it...
someone need to get there hands on the FI part of an r6 and get it on the FZR motor. If I had the money, then I would do it.

[match417]

i thought about it before, the only real problem with that is in order to run a fuel injected setup, you would need 5 sensors, mass air flow sensor (or manifold absolute pressure sensor), knock sensor, throttle position sensor, crank sensor (or cam sensor), and intake air temp. Those are necessary for fuel all injected engines. Most of those are simple to install, but the problem is the knock sensor, our bikes don't have one. And you would have to drill through the block to put it in. So that pretty much kills the idea for an FI FZR. sorry, can't be done to a carb'd engine

[sweekster]

i thought about it before, the only real problem with that is in order to run a fuel injected setup, you would need 5 sensors, mass air flow sensor (or manifold absolute pressure sensor), knock sensor, throttle position sensor, crank sensor (or cam sensor), and intake air temp. Those are necessary for fuel all injected engines. Most of those are simple to install, but the problem is the knock sensor, our bikes don't have one. And you would have to drill through the block to put it in. So that pretty much kills the idea for an FI FZR. sorry, can't be done to a carb'd engine

Ok But who says it can't be done on a carbed bike? That's like saying you can't fuel inject a car. A few FZR examples below

Female owned 1988 FZR 1000


Not sure of the year of these but they started their lives as FZR 1000s as well.










If it can be done on a 1000 it can be done on a 600.

[match417]

wow, i have to say i'm impressed. but actually it's not like saying you can't fuel inject a car, that's a bit of an exaggeration... I didn't even know they made those kits. It does kind of go against what I've learned, but if someone has enough determination I guess they can make anything. It doesn't have all of the sensors I think it should have, and I personally think that it would do the same thing as a good jet kit, except adding in the electronic ability to change how much fuel you're getting across different RPM ranges, but without the right sensors, the ecu can't tell what's going on inside the engine and adjust accordingly. Those kits without the proper sensors are just a waste of money in my opinion. Without a knock sensor, the ecu can't automatically retard the timing if you get knock trying to accelerate at 7k rpms on a race track and can't hear it with your ear because the engine is so loud and you're screaming down the track (that's possible engine damage), so you can't safely advance timing any more than you can on a carbureted engine, and without intake air temp the ecu can't automatically adjust for the best performance depending on how dense/cold the air is going into it, microsquirt doesn't seem to have an air temp sensor from what i've read, but i can't see why they didn't add it in, the other systems might have it, but the main drawback is no knock sensor. If i had the money to waste i'd probably put it on my bike for the sole purpose of eliminating the diaphragms and extending the life of my bike, but if i had the money to waste I wouldn't be riding a $1000 FZR, i think it's just more expensive than it's carb'd alternatives that provide just as much performance. It just seems like an electronic carburetor. On the PLUS side, you eliminate the diaphragms, should get a little more fuel efficiency, don't have to worry about gas in the carbs while it sits over winter, but it just seems like a waste of money. Now that the FI bikes are out and have been for a few years, why not just get a used one for the same price as carb'd bike + FI system? Unless the bike has sentimental value.

[match417]

i'm not trying to perpetuate an argument and I hope it doesn't seem like that, nor am i trying to put you or anyone down after they prove me wrong. I accept rebuttal, and I hope i'm not coming across as a self-proclaimed know-it-all, I know there are people out there that know more than me, and I didn't go to college, but I did go to a high-performance automotive tuning school and learn specifically how EFI system should be set up and tuned, and i don't really like the idea of turning a carbureted engine into a FI one unless it's done with all of the right sensors. hope i didn't come across the wrong way above.

[yamaha_george]

i'm not trying to perpetuate an argument and I hope it doesn't seem like that, nor am i trying to put you or anyone down after they prove me wrong. I accept rebuttal, and I hope i'm not coming across as a self-proclaimed know-it-all, I know there are people out there that know more than me, and I didn't go to college, but I did go to a high-performance automotive tuning school and learn specifically how EFI system should be set up and tuned, and i don't really like the idea of turning a carbureted engine into a FI one unless it's done with all of the right sensors. hope i didn't come across the wrong way above.

Match,
On this list we all have our opinions and we all respect other peoples this forum is about learning, so take it easy on yourself Ok.

A lot of guys here will love their FZR but just have to see "what if I just do this" attitude. The idea of a FI FZR seems a lot of work to me personally (especially if you go for all the sensors) but the idea of building some thing like Megasqirt FI and then fitting it is a hell of a curiosity factor and for sure no one is gonna roll up at a bike meet with one just like yours .

Having a "different" production line bike is the thing to have for most guys here.

Going on to that 1K with FI did it get ridden and was it far better than a carb 1K?

AS for the YZF 6 carbs some pics would be good , hi-lighting the "eztras " would be good

[sweekster]

No worries. I was just simply saying that EFI can and has been done on an FZR. They aren't kits either. Complete custom setups. But as you can see it can be done. I myself prefer the carbs (that's until I get tired of them) because it's less work, keeps things simple, and is more fun for me.

Going on to that 1K with FI did it get ridden and was it far better than a carb 1K?

I don't have any concrete results but i know the black framed FZR1k with the R1 tail is in Germany and gets ridden. I'm sure it makes a bit more power than the stock 145hp with the proper tune on the fuel map but that's only a guess.

So back to this YZF carb on FZR thing....anything new since yesterday?

[manveru]

why would you fuel inject a fzr, is it really worth the trouble? most likely not. better off getting a different bike if you want FI imo.

[yamaha_george]

Guys can we get this back to topic, I'm bursting with curiosity about using different carbs on the FZR
Thanks
GEo

[match417]

fasterthanur has yzf600 carbs on his bike i think, but i think it was like that when he got it. I know it works, I just want to know exactly what needs to be done so i can just put them on and crank it up, but it looks like i might have to play around with it. I'll have to wait until my new fuel pump comes in the mail, i'm getting an R1 pump, mounts to the bottom of my R6 tank nicely. Hopefully I'll have it by the weekend.

[yamaha_george]

fasterthanur has yzf600 carbs on his bike i think, but i think it was like that when he got it. I know it works, I just want to know exactly what needs to be done so i can just put them on and crank it up, but it looks like i might have to play around with it. I'll have to wait until my new fuel pump comes in the mail, i'm getting an R1 pump, mounts to the bottom of my R6 tank nicely. Hopefully I'll have it by the weekend.

M,
Did you PM Faster to see if he did it or someone else Photo's could help you out some.
i will ping another list and see what i can find too.
G

[FasterThanUr]

My bike had the carbs on it when I got the bike.From what I could tell they were stock,and with out the ram air hooked up it ran pretty good with a flat spot around 5k.They fit in the stock boots,but you have to use the force of god to get them in there.Im only 135 pounds so a bigger guy could probably get them in there a little more easy.
I still havent got the ram air to work right.On the yzf the equalization tubes are bigger than the ones im using and I havent had the time or money to mess with it.I just got back out to calli from louisiana a few weeks ago.
Any way I just pulled my ram air tubes to the inside of my fairing for now and It runs great.I also adjusted the mixture screws out.They still had the caps on them from the factory.The flat spots gone and it has much better responce in the bottom end.
Im still using the stock fzr air box so im not sure if the yzf's box will fit.
All in all im pretty sure you could just shoehorn them in and run it as is.Im still running a little rich so going down a jet size would probably help.Oh and the wires on the side of the carbs is the tps sensor and is not needed.Also I dont have anything hooked up to the cooling lines there just pluged off..