FCR CARBS FOR VTR1000 FOUND!
 

here in the states, but they dont have enough normal interest to carry them because they have to buy them in sets of 10. so im going to through this out, possible group buy for FCR carbs that will bolt on to the VTR, im getting pricing and stuff now, should know in a day or so.

lets start with just posting in here if your interested and see if even 10 people would want to try something like this.

(i didnt see a group buy section in the forum? am i blind or is there not one?)

Ok, i'll admit it, I don't know what FCR carbs.

Are they an improvement over stock?

More info please.

Man, that sounds like a $1000 set of carbs to me. If it's something reasonable I would be interested.

I'd love to hear some actual users- experience with these on this bike. Anyone know of any? I have had sets on older inline 4s and the outcome has been variable - nice response, easier jetting but there are some inconveniences living with them day to day also - and are these FCR's with the accelerator pump or without.

Please elaborate. I've had a limited amount of experience with FCR carbs but everything has been positive. There were no streetability issues at all. This was also on an inline 4, for what that's worth.

on the I4's and dirtbikes/atv's that ive used them on ive had nothing but good luck with them. compared to the cv carbs on the hawk they are a dream to tune, plus it would allow for easy tuning even with the airbox removed.

Most of the concerns come with initial development and setup. I have used them primarily in applications when the diameter has been well established and physical carb spacing all worked out. As too large/too small is a problem in optimal tuning. Trying to apply to a new setup can be a lot of time/effort/money. I don't want to spend $6-800 on the carbs and do the development work myself only to find out I have the wrong size. So that is my biggest concern - I'd want to know that we are getting a carb that will work well and is spaced/set up in the ballpark first and for what type of airbox. I also do not know if losing the engine coolant circulation would effect fueling on these bikes - I have never rerouted the circulation to see if the stock carbs benefit from it or not, but it was designed in for some reason.

Regarding Day to day use, having an 'accelerator pump' helps a lot (don't know if these have that). But losing the choke, depending on the temperature extremes you ride in, is sometimes a problem with initial starting and warm up. Also, as great as the improved response is, down low fueling is sometimes too abrupt for smooth around town riding. Depends on how one will use the bike and how the FCRs work on big bore twins.

I believe their is some experience with Ducatis and even SV (at least 650) engines that would be relevant.

those are the limits of my experience too - but as I said above, always in the context of being very close with the initial setup and sizing based on someone else's trial and error. So, my question is simply, does that experience exist for this engine?

there is some experience on the net with these carbs on superhawks. also keihin makes the stock carb and keihin makes the 41mm fcr kit for the vtr. im going to guess they knew what they are doing.

there is a member on here who knows a guy that got an fcr carb kit for his hawk, and there is a couple of webpages that come up if you search on yahoo or google.

and im running the stock carbs with no coolant lines on them and i live in KS, we have everything from below freezing to 100+ temps and ive never had a problem.

the no choke on the FCR's that i have used has never been an issue.

i dont know if they are accelerator pumped, i can ask next time i talk to the guy though.

(almost every site ive came across that has tech talk on fcr carbs for the vtr is in japanese...)

Zedicus, sorry to post jump, but I read you are in kansas. I am in Wichita. Also ironic is that you joined on my birthday.

Anyway, what part of kansas?

im out in garden city man. tis like 3.5 hours from you.

I'm sure they knew what they were doing, of course its also possible they weren't intending them for a stock motor as not many casual owners are going to be swapping carbs. I'm as nutty as anyone for modifying these things, and would probably be one of the interested parties for a purchase. But I'd just like to hear some experiences that go beyond some guys knows a guy etc. I can't find anything, but this whole internets are very confusing to me. If you have some info, or useful links, post them. the choke is an issue, but obviously not a huge one, but there is a tradeoff of course.

bill

With the accel pump it's no biggie, open the throttle a few times and start, it will feel like a dirtbike.

i am interested count me in what is the price??

hmmm... an accelerator pump would be mighty nice... :)

so what the heck is this thing??

small update:

this carbs DO have accelerator pumps, also keihin USA is in the process of contacting keihin JAPAN for pricing, and then they will get back to the distributor that i am talking to. aparently no one this side of the pond has ever ordered these before, but they are saying they are fairly popular in japan.

I couldn't find any SH info. the duc guys like them for their twins - lots of info on those - all very positive.
are you talking to SUDCO? and how many interested do you need?

j shizzy- do a search or go to the keihin fcr site. the are smoth bore direct lift , no cv, carss with flat slides. think four stroke dirt carb - instant response and simplified tuning process

heres a myspace with a video, there was a japanese webpage that i seen the other day that had a small writeup about them, in japanese. if i find it again i will link it too.

http://video.aol.com/video-detail/vtr/2589423157

top right video shows the carbs

That guy that knows the other guy is me.

He and I discussed the FCR carbs quite a lot, so I heard all about his experience with them. I have tried to contact him recently for something else without luck though, so I most probably won't be able to get any more info for you.

He has 41mm FCR's with pod filters, and reckons that they provide more power everywhere in the rev range. I was concerned that they might not be as streetable as the CV's, but he reckoned they work fine in the traffic.

His only reservation was that it takes longer to set them up the first time, as the FCR has more adjustments that can be made compared to the CV.

His bike has an awesome full exhaust system (best I have ever seen!) and pod filters, but no internal modifications. The flat slide carbs don't need an airbox to work properly.

That is about all I know. I don't remember what the dyno figures were though.

i am talking to someone from sudco about this.

we need atleast 10, though i forgot to ask if they have to be ordered in multiples of 10 or if anything past 10 is acceptable.

thanx shayne, u was the guy i was thinking of but couldnt remember yur name off hand

*waits for new carb price*

*waits for money to magically appear in account*

its the weekend, i would imagine i wouldnt here back on pricing till this coming week, especially since they had to contact keihin japan.

shit I would love to know,seeing as I have an account w/ sudco :teeth

Im watching this thread with interest to see what develops. I know that the DRZ400 runs much stronger with the FCR carb on it. I would have to believe that the VTR would see much improvement with the FCR's as well.

It will lift the front easily, the power will knock to the back door violently :D

I'm curious if the smaller venturi (41mm vs. 48mm) would have any effect. Limit on the top end?

Not sure but the throats and boots are smaller than 48 mm, my guess is not too bad, but the pods filters, no likey, I would rather retain the airbox since the tank space is lost anyway, may be a biotch to fit tough...

CV carbs typically require a larger diameter (think back to when CV carbs began to appear on road bikes in the later 70`s/early 80`s, they had significatnly larger diameter than the slide carbs they replaced) so going to a 41 mm FCR would not be a problem IMHO.

yup, in my opinion CV carbs loose efficiency and have more parts to break. some of them do have more tuning options but not ours. so going to 41mm FCR carbs on a hawk should do a number of things, pick up power, improve throttle response by leaps and bounds, and i would imagine that it would improve fuel mileage.

honestly im not sure what the benefits CV carbs are spose to have, i dont know why any manufacturer would use them on something.

I guess it's like the new e-throttle bikes that interfere with the driver inputs, the damn slide is a second throttle that smooth things out. I'll go check out what the KTM guys use on 510cc singles on thumpertalk

Edit : The 530 EXC uses a 39mm FCR carb stock, not much talk about swapping it for better, the jug is a 510cc and rev about 7500 rpm

CV carbs are used as they are better suited to the lean jet settings required to meet EPA regs. Prior to their use, bikes with slide carbs would hiccup and buck under throttle, soemthing CV carbs practically did away with. While I think there would some merit to trying the FCR's on the VTR, I can attest that my VTR with a properly set Dynojet kit has wicked throttle response; to date, I have not yet ridden a fuel injected bike (granted I haven't ridden them all) that even comes close.

a well set up slide carb should not hiccup or buck, my cbr 600 f2 with fcr's certainly did not, and my fourwheelers with pwk carbs certainly do not. and fuel injection does hav its upside, but i am more use to using carbs and havent had a bike with fuel injection stock. ive got a set of throttle bodies and stuff to do fuel injection on my hawk, but dont have the time to build the wire harness and stuff.

UPDATE:

not anything too important, i talked to the dealer and he said it usually takes 1 to 2 weeks to get pricing info when it has to come from japan. he will let me know as soon as he hears back from them.

Did they (or can they) give you a ballpark on the cost? Certainly they have imported enough carbs to have an idea. I think this is very important. You are asking for interest, I guarantee that more interest exists for a $400 set of carbs than what exists for a $2000 set. I would be really surprised if these carbs were under $750. Getting an idea of this now could really save you time in the future. Honestly, I think you are going to have a lot of trouble finding 10 people to buy. I'd love to see this happen, but I'm trying to stay realistic about it at the same time.

i can buy 2 bare FCR downdraft carbs at about 400$ each. now that still is not a great estimate as i can get 4 of the same carbs ready to connect to a 900RR for like 995$ shipped to my door. so im going to guess ROUGHLY that they would be between 600$ and 1000$.

this is me guessing based on what places sale that type of carb for though.

also, i just found out he can do anything over 10, so if we end up with 12 or 17 or however many peeple then its all good!

getting to 10 is my concern also. Judging from the Ducati carbs I'm guessing Jamie is right on with price close to $800 - these superhawk guys are cheap bastards! or we'd all have new bikes! So you might want to start a new post - "interest in FCR carbs?" and suppose a price at $800 just to start some PR towards getting going.

what's the difference between the dirt/mx versions versus the street versions of the fcr carb? i've seen a few of the dirt/mx 41 fcr on ebay. why can't we use those?