Hey, I installed the jd kit for low elevation and now my 41mm keihin is overflowing like crazy when I turn on the fuel...any suggestions?
Thanks for the idea berger but I pulled the bowl off today and everything appears to be good. Is there something specific that I should be looking for on the float or needle and seat? I don't know what needle it is, but the one fastened to the bottom of the float bowl appears normal and secured well and the gasket looks good as well.
On the jd kit they supplied a leak jet and I could not install it as per the diagram and instructions as the part where you would thread it into is only 'bowled' out. I am wondering if there is a mistake in the hardware?
On the jd kit they supplied a leak jet and I could not install it as per the diagram and instructions as the part where you would thread it into is only 'bowled' out. I am wondering if there is a mistake in the hardware?
Yes, the bike is a 07 fe 550 with original carb, at least I think it is as I know the bikes history.
I'm not quite catching what you're saying about the float tang? When I re-installed the float bowl the needle slid up into the carb between the float so I didn't see what all went on. Should I have been aiming it some where?
I'm not quite catching what you're saying about the float tang? When I re-installed the float bowl the needle slid up into the carb between the float so I didn't see what all went on. Should I have been aiming it some where?
Joined Apr 2002
3K Posts | 11+
Phoenix Arizona
Yeah, the Berg does not take a leak jet. I think some of the jap manufactures did. I wonder if it is the right kit or just one size fits all type of deal. You probably would have been better off buying a jet kit from taffy.
You need to make sure the needle fits correctly into the seat. You should probably remove the carb so you can turn it over and see that it goes into place properly. Make sure there is no dirt or debris on the float needle sealing surface.
You need to make sure the needle fits correctly into the seat. You should probably remove the carb so you can turn it over and see that it goes into place properly. Make sure there is no dirt or debris on the float needle sealing surface.
Joined Apr 2002
3K Posts | 11+
Phoenix Arizona
http://www.sudco.com/fcrmx.html
#42 is the float needle. #43 is the clip that attaches it to the float, make sure it is in place. 36 is the seat, make sure there is no dirt or debris on it.
#42 is the float needle. #43 is the clip that attaches it to the float, make sure it is in place. 36 is the seat, make sure there is no dirt or debris on it.
Joined Nov 2001
17K Posts | 774+
Ely, England
I've just had three hundred dual taper needles made. they'd better be right or it's a costly mistake! :lol: :lol:
I've yet to hear anything good said about a JD kit. Berger, do you remember when Lineaweaver Dyno'd his v a JD needle? a HUGE difference.
regards
Taffy
I've yet to hear anything good said about a JD kit. Berger, do you remember when Lineaweaver Dyno'd his v a JD needle? a HUGE difference.
regards
Taffy
The jetting change by itself has no bearing or influence on the overflowing problem. The overflowing can be due to one of several factors such as: 1) too high float level, 2) faulty/dirty needle or needle seat, or 3) a bad valve seat O-ring (#37 in the diagram) where the needle seat fits to the carb. The O-ring problem is a fairly frequent occurrence in the FCR carbs that utilize the O-ring.
I'll have to differ on the JD Jetting evaluation as there are many satisfied JD customers who do indeed say good things about JD Jetting.
I'll have to differ on the JD Jetting evaluation as there are many satisfied JD customers who do indeed say good things about JD Jetting.
I have to agree with Chas I"ve had a couple of JD jetting kits on different bikes and they work very well.Not to mention the type of power gains you can feel ie- seat of the pants power gains.
Thanks for all the reply's. I'll take the carb out this time and check the float needle and seat and make sure I didn't damage anything or get any dirt in there; as I did re-install the float bowl while the carb was still in the bike.
Is there a possibility that I bent the float bowl needle? It looks like copper so that shouldn't be a possibility, but you never know.
I've had jd kits before and really have enjoyed them to date.
Cheers.
Is there a possibility that I bent the float bowl needle? It looks like copper so that shouldn't be a possibility, but you never know.
I've had jd kits before and really have enjoyed them to date.
Cheers.
BTW, the hp curve looks like it only benefits above 7000rpm. Not too often that I rev her way up there.
I have seen that HP curve in the past and remember it well. The results are succinct, however are relatively meaningless. First of all, these are the results of full throttle dyno runs and not indicative of part throttle operation. Secondly, it is possible to achieve maximum HP with a number of different jetting combinations including those from JD Jetting, Lineaweaver, Taffy, etc. I have had excellent success with JD Jetting, however obtaining perfect jetting is still not just plug and play. Even though JD Jetting comes with easy to follow instructions, one still needs to 'play around' with needle clip position, main and pilot jets, AP function, etc.
Without getting too much into the jetting issues...
So I pulled it all apart and the needle and seat are all looking good with no dirt or debris. The fuel screen at the top of the seat had a little debris in it but I would be surprised if that would cause the overflow. I will clean everything well and put it back together and hopefully that will work, however I am doubtful at this point that I have solved any problem because I haven't done anything other than pull it apart and give it a visual inspection.
Should the overflow continue maybe I should just resort to ordering a new needle seat o ring and float bowl gasket? If so, where is the best and quickest place to buy keihin parts from? Hopefully on the net. And as I live in Canada I hope they will ship?
Any extra help would be appreciated.
Thanks
So I pulled it all apart and the needle and seat are all looking good with no dirt or debris. The fuel screen at the top of the seat had a little debris in it but I would be surprised if that would cause the overflow. I will clean everything well and put it back together and hopefully that will work, however I am doubtful at this point that I have solved any problem because I haven't done anything other than pull it apart and give it a visual inspection.
Should the overflow continue maybe I should just resort to ordering a new needle seat o ring and float bowl gasket? If so, where is the best and quickest place to buy keihin parts from? Hopefully on the net. And as I live in Canada I hope they will ship?
Any extra help would be appreciated.
Thanks
Ok, so put it back together and it is still overflowing out of hose 207 very rapidly and then bubbles out of hose 206 horizontal (numbers off of the sudco diagram).
I cleaned very thoroughly the needle and seat and the float bowl gasket. I guess I should order the float bowl gasket and needle o ring?
I guess it wouldn't hurt to return the carb to its original jets to see if somehow that is causing the problem because the was no overflow problem. If the main needle is not seating to the main jet could that cause the overflow?
I cleaned very thoroughly the needle and seat and the float bowl gasket. I guess I should order the float bowl gasket and needle o ring?
I guess it wouldn't hurt to return the carb to its original jets to see if somehow that is causing the problem because the was no overflow problem. If the main needle is not seating to the main jet could that cause the overflow?
Joined Apr 2002
3K Posts | 11+
Phoenix Arizona
This has to be a
1)float issue, either heavy float or adjustment
2) float needle/seat or perhaps the seal under the seat.
There is only one way for fuel to flow into the carb and that is through the needle and seat. The float controls the flow.
1)float issue, either heavy float or adjustment
2) float needle/seat or perhaps the seal under the seat.
There is only one way for fuel to flow into the carb and that is through the needle and seat. The float controls the flow.
My best guess with the leaking problem as previously indicated would be the O-ring under the needle valve seat. I have seen a number of these go bad in the last several years. Note that these O-rings are inexpensive and available as an individual item through Yamaha dealers for FCR carbs.
I'll get a new needle seat o ring and give that a go.
How does a guy adjust the float level, and why would that have changed? Could the float just be sticking? Maybe I'll tap the float bowl and bunch of times and maybe it'll unstick.
Thanks
How does a guy adjust the float level, and why would that have changed? Could the float just be sticking? Maybe I'll tap the float bowl and bunch of times and maybe it'll unstick.
Thanks
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