Hey all,
I was told by a mechanic at Poway Bikes, known for their work on FJ's, that the Kawasaki ZX10 carbs will increase power on our FJs. Anyone know anything about that? Is this a viable bolt on upgrade to increase power on our bikes?
Inquiring minds want to know,
CraigO
90FJ1200
Craig, there was a web site I recall, where you could get the spacing of the carbs based on the bike's make and model. I can't find it.
So, a couple of questions
1) Is the carb spacing the same?
2) What mm diameter are the ZX-10 carbs?
3) Did the ZX-10 have a fuel pump?
4) ZX-10 have choke linkage?
5) ZX-10 have center pull (between 2&3) for the push/pull throttle cables?
If the ZX10 carbs work out, it's got be a lot cheaper than a $1250 rack of Keihin FCR39's
http://www.motorcyclecarbs.com/Keihin_FCR_Horizontal_-_Yamaha_C627.cfm (http://www.motorcyclecarbs.com/Keihin_FCR_Horizontal_-_Yamaha_C627.cfm)
Pat,
Here is the link to Poway Bike. This is of a FJ1200 that they modified for a customer.
http://www.powaymotorcycle.com/gallery/yamaha/YamahaFJ1314.html (http://www.powaymotorcycle.com/gallery/yamaha/YamahaFJ1314.html)
In one of the pics they show the ZX1000 carbs mounted to the FJ's intakes. No mention of any mods done to accommodate them. Here is the quote: "We used ZX1000 Kawasaki 36 mm Flat Slide Side Draft carburetors for the fuel delivery."
When the time comes to pull the trigger on my FJ's motor, I think I will have them do the engine work.
Cheers,
CraigO
90FJ1200
And no heat shield on the carbs, by the looks of it.
I have the same oil cooler, but his is upside down, compared to mine.
Bill.
Quote from: billwest on January 28, 2011, 07:19:35 PM
I have the same oil cooler, but his is upside down, compared to mine.
Bill.
I noticed that as well; pretty hard to drain the dirty oil that way...
Randy - RPM
Quote from: Pat Conlon on January 28, 2011, 03:25:43 AM
Craig, there was a web site I recall, where you could get the spacing of the carbs based on the bike's make and model. I can't find it.
So, a couple of questions
1) Is the carb spacing the same?
2) What mm diameter are the ZX-10 carbs?
3) Did the ZX-10 have a fuel pump?
4) ZX-10 have choke linkage?
5) ZX-10 have center pull (between 2&3) for the push/pull throttle cables?
If the ZX10 carbs work out, it's got be a lot cheaper than a $1250 rack of Keihin FCR39's
http://www.motorcyclecarbs.com/Keihin_FCR_Horizontal_-_Yamaha_C627.cfm (http://www.motorcyclecarbs.com/Keihin_FCR_Horizontal_-_Yamaha_C627.cfm)
The 39's work very well if you modify the throttle cable mount and use Motion Pro cables. I have used them for years. The Mikuni 40 or 36 RS's work very well if you take some throttle spring out of them (not hard to do). They are very easy to tune too.
QuoteThe 39's work very well if you modify the throttle cable mount and use Motion Pro cables. I have used them for years. The Mikuni 40 or 36 RS's work very well if you take some throttle spring out of them (not hard to do). They are very easy to tune too.
Wow, a voice out of the blue. Hi there, I don't think we have been properly introduced. :hi:
What year FJ do you have and how long have you been using the Kawi carbs? What performance improvements did you get?
CraigO
90FJ1200
Craig, I think he means the Keihin FCR39s, described here: http://www.fjmods.btinternet.co.uk/Carburation.htm (http://www.fjmods.btinternet.co.uk/Carburation.htm)
Kookaloo Frank and Steve C. have these carbs on their big block 1349 motors and, other than having no choke, they work well.
Cheers! Pat
Quote from: craigo on January 29, 2011, 09:25:26 PM
QuoteThe 39's work very well if you modify the throttle cable mount and use Motion Pro cables. I have used them for years. The Mikuni 40 or 36 RS's work very well if you take some throttle spring out of them (not hard to do). They are very easy to tune too.
Wow, a voice out of the blue. Hi there, I don't think we have been properly introduced. :hi:
What year FJ do you have and how long have you been using the Kawi carbs? What performance improvements did you get?
CraigO
90FJ1200
Hey Craig. My name is Mike Rieck and one of my bikes is an 87 FJ that I bought new. It's on it's 4th, normally aspirated engine configuration. I've been lurking on this sight for a bit and finally decided to get involved. The fella's on the board seem like a nice bunch of guys who really love the FJ. I know I do. I owned a small shop in Massachusetts in the 90's and currently focus on cylinder head porting (jmrporting.com) engine building. I also manufacture a billet cylinder for SOHC CB750's (my first love) that is Nikasil lined and allows for proper 1000cc displacement. The bulk of my porting business is vintage SOHC Honda's whether for street, roadracing or land speed. I also really enjoy porting FJ heads as there is a lot of room for improvement. :yes:
Got any pics of your porting on a FJ ?.
What porting do you reccomend for the street (93 octane) and what comp pistons do you run with the same set up.I have a ported GP 1200 (waverunner) and a non ported GP1200.I love the ported one
it makes about 165-170 hp or so.After I turn the FJ1100 into a FJ1200 porting sounds like a good option.What would porting cost on a FJ ?.
Quote from: Pat Conlon on January 28, 2011, 03:25:43 AM
Craig, there was a web site I recall, where you could get the spacing of the carbs based on the bike's make and model. I can't find it.
I found the site, the info. was buried in the Mikuni RS application table
http://www.motorcyclecarbs.com/Mikuni_RS_Application_Informat_W93C1430.cfm (http://www.motorcyclecarbs.com/Mikuni_RS_Application_Informat_W93C1430.cfm)
Yeppers, the Kawasaki 1986-1987 Ninja ZX1000 has the same carb spacing 77-85-77 as our FJ's.
Been running a set of Ninja 1000 carbs for 10+ years.
They may make a little more power, but definitely have a stronger low end. This is mostly due to have a quicker turn throttle cam.
I also get better fuel milage with these, averaging 40+ mpg with a 1250cc engine.
You will have to slot the mounting rack aprox 1/8" and make up throttle cables that have shorter inner cables.
I also cut notches out of the heat shield so I can still run it.
They are quite a bit shorter in length. To run a stock air box I pulled the boots out about 3/8" and glued them in place.
Otherwise a jet kit and pod filters are required.
MC
Pat,
Thanks for digging that up for me. I am not happy with the low and mid on my bike. I figure it has to do with the carbs. They were never really right since I bought her. The air screws were tampered with and they may have been screwed down to tight at one time in their life.
So, if the ZX carbs are a straight bolt on, I may just go with a set of those instead of trying to fix these.
Cheers,
CraigO
90FJ1200
First gen FZ1 carbs should also work on the FJ. They're just a newer version of our Mikuni carb.
DavidR.
I have a set of those available ...
I don't think the FZ1 carbs will work due to spacing.
FJ's have the cam chain in the middle of the cylinders, FZ1 has it on the end.
I think the carbs are evenly spaced on the FZ's.
MC
Quote from: fj1250 on January 31, 2011, 04:02:05 AM
I don't think the FZ1 carbs will work due to spacing.
FJ's have the cam chain in the middle of the cylinders, FZ1 has it on the end.
I think the carbs are evenly spaced on the FZ's.
MC
Despite what sounds like a cogent reposnse with sound reasoning, and knowing NOTHING more than who posted the original comment (David R.) and his deep well of carb related knowledge, I'd bet a 5 spot that he's right, and you're not.
Just saying....
(popcorn)
IIRC the Mikuni FZ-1 carbs are used on the FJ rack using the BS36's throttle shaft and plates...But they are a bitch to overhaul and clean...
David will enlighten us
Quote from: Dan Filetti on January 31, 2011, 10:21:44 AM
Quote from: fj1250 on January 31, 2011, 04:02:05 AM
I don't think the FZ1 carbs will work due to spacing.
FJ's have the cam chain in the middle of the cylinders, FZ1 has it on the end.
I think the carbs are evenly spaced on the FZ's.
MC
Despite what sounds like a cogent reposnse with sound reasoning, and knowing NOTHING more than who posted the original comment (David R.) and his deep well of carb related knowledge, I'd bet a 5 spot that he's right, and you're not.
Just saying....
(popcorn)
(popcorn)
It's been a few years, But when I was working on a set of FZ carbs, I held them up to a set of FJ carbs and the spacing "looked" identical. I currently have both sets of carbs on the bench in my garage. If I can remember to do it, I'll compare them again tonight.
Not sure about the throttle linkage, Pat, but you're correct about them being a PITA to work on.
DavidR.
Well one nice thing with the FZ1 carbs you don't fry your hands when trying to ajust the idle speed. The only bitch I have with them is the mixture screws are on the bottom insted of the top like on the FJs
I'll bet a 5 spot that someone with enough time on they're hands and a dremel tool could make FZ1 carbs fit.
So.....Who's gonna try them???.....I nominate ..... CRAIG!!
http://cgi.ebay.com/ebaymotors/KAWASAKI-ZX1000R-CARBS-CARBURETORS-86-87-NINJA-1000-/190477401673?pt=Motorcycles_Parts_Accessories&hash=item2c59567e49#ht_1282wt_1119 (http://cgi.ebay.com/ebaymotors/KAWASAKI-ZX1000R-CARBS-CARBURETORS-86-87-NINJA-1000-/190477401673?pt=Motorcycles_Parts_Accessories&hash=item2c59567e49#ht_1282wt_1119)
OK, I've got a set of 1st gen FZ-1 carbs I bought about 3 years ago. I never even opened the box when they showed up. I'm in $200. I just want out. Any nibbles??? Craig?? Cheaper than a set of ZX-10 carbs, anyway ...
Ed
Quote from: Pat Conlon on February 01, 2011, 01:11:24 AM
So.....Who's gonna try them???.....I nominate ..... CRAIG!!
http://cgi.ebay.com/ebaymotors/KAWASAKI-ZX1000R-CARBS-CARBURETORS-86-87-NINJA-1000-/190477401673?pt=Motorcycles_Parts_Accessories&hash=item2c59567e49#ht_1282wt_1119 (http://cgi.ebay.com/ebaymotors/KAWASAKI-ZX1000R-CARBS-CARBURETORS-86-87-NINJA-1000-/190477401673?pt=Motorcycles_Parts_Accessories&hash=item2c59567e49#ht_1282wt_1119)
Craig is a little poor of late. :cray: Craig needs to sell some property. :hi:
Craig is also going to Europe in March with the wife for a couple of weeks. Germany to be exact, to visit the inlaws. (the reason for his current poverty) :ireful:
So if you nominate Craig to try the carbs, someone other than Craig will have to pay for the carbs. Or I have to win the lottery or something like that.
Didn't I just read somewhere how much fun the FZ1 carbs are to work with? :diablo:
I also read the you have to mod the boots off the airbox on the ZX10 carbs. :ireful:
I don't know what I am going to do with my carb problem right now. But when I get back from vacation, sell some real estate and get a little ahead, I will let you know.
Cheer, you guys. Thanks for all the info.
CraigO
90FJ1200
Well, I held them up nose to nose last night and the FZ1 spacing is identical to the FJ spacing. The location of the cam chain is not a factor, the center carbs are spaced out like the FJ because it's needed to clear the throttle cable mechanism.
The only difference that I could see is the throttle mechanism open backwards of the FJ; throttle opens by pulling up on the rear cable rather than the front. No idea if the FJ throttle cables will work in the FZ linkage.
DavidR.
Quote from: tqmx1 on January 31, 2011, 05:02:44 PM
Well one nice thing with the FZ1 carbs you don't fry your hands when trying to ajust the idle speed. The only bitch I have with them is the mixture screws are on the bottom insted of the top like on the FJs
I have permanently scarred knuckles on the first 2 fingers of my right hand from reaching in to adjust the idle speed of a hot FJ engine. Now a carry a long screwdriver for that chore.
With the Motion Pro 90 degree screwdriver (~$30), adjusting the FZ mixture screws is a breeze, no tank removal required!
DavidR.
You should be able to make a flexible extension (like those found on the FCR's or late model carb equipped bikes). I have done this for CR29/31's used on CB750's. Works great.
^^ Got a picture of that? I'd love to add a remote adjustment to the FJ's impossibly hard to reach idle screw. Long screwdrivers are the best way to do it, but it'd be nicer to not carry yet another tool for the task.
Quote from: andyb on February 01, 2011, 02:20:53 PM
^^ Got a picture of that? I'd love to add a remote adjustment to the FJ's impossibly hard to reach idle screw. Long screwdrivers are the best way to do it, but it'd be nicer to not carry yet another tool for the task.
Sure. Let me figure out how to post a pic and I'd be more than happy to. My older son....Mr Computer Science/Chemistry double major is off at school and he left me with limited knowledge of pic loads etc on this new Mac unit. Being old and dumb sucks. :wacko1: