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FCR owners, please reply?

Its actually a 38, but you knew that all along, didn't you Taff?

FCR 39 Mk1, no Octopus
Current settings on 98 FE501 are
Pilot Air Screw/Jet - 60,
Main Air Jet - 160,
Starter Jet - 60,
Pilot Jet - 38,
Main Jet - 165,
Needle - ELN, clip 3,
Fuel Screw - 1.25,
Float - 9mm,
Accelerator Pump - 0.6mm stroke,
Slide - 0.5 - std,
Altitude - 800m
 
Slide?

Ok I have just noticed that Steve's slide is a 0.5 and my slide has 15 written on it? What is the difference between the two???
 
look scully

stevie boy is just a sloppy bugger and he doesn't check his undies for skid marks either!

slide cutaway throughout the world pretty much w/o exception is 1.5mm.

amen

Taffy
 
Taffy, Scully,
If that's the case, ie the 1.5 slide, then I've made another transcription error. It may be that the marking on the slide was vague, poor excuse I know, but I don't plan on pulling it down and checking it immediately. It's a good thing someone is on the ball, because I've apparently dropped it on this one.

:bounce3:

Cheers
Steve
 
Hi guys,

I hope you can help me.
After testing a Keihin FCR from a KTM exc 400 on my Berg (Fe 501 2002)
which worked really good, I got a FCR carb from a Yamaha YZ 426.
I thought this carb would be fit better into my bike because of the not existing mechanical levers for the accelerator pump.
Now I have a problem. The bike will not fire. I checked all jets and settings but can´t find the main reason for that.
I´m new with the Keihin. Can someone tell me where the pilot air screw is to be found. I don´t know where to set the 0.5 turns out.
What I can say about the jets is the following:

Pilot Jet - 42,
Main Jet - 180,
Starter Jet (?)- 62 (it´s a long jet besides the main jet),
Needle - OBEKD, clip 4,
Fuel Screw - 1.5 (this is the one at the bottom of the carb, or not? outside the carb)

what about the needle jet where the main jet is sitting in? I don´t find a number on it.
I tried to exchange some jets from the other Keihin, but some of them doesn´t fit.
Thinking about my experiences with the old dellorto carb I would say pilot jet and starter jet are the reason for this.
Can someone give my some hints why I have hard start problems?
Maybe a photo or a pic where all parts of this carb can be defined.

Thanks

hribman
 
hribman

i trust you gave the carb a damn good clean before you fitted the carb?

next we have a complete jetting set up for you from this very thread. so spend some euros and get it right!

the PJ's are different between the mk1 and the mk2 carb. after that they're the same.

your biggest problem is the starter jet. at 62 it's way too small and i have fitted a #80. you can buy this jet from a yamaha dealer

part # is 3TJ-1494F-19-00 FOR THE #80

the starter jet IS NOT the long one next to the MJ. the long one is the PJ. the short one with the rounded shoulders is the starter jet.

there is only one emulsion tube for the entire range.

the code of the needle isn't EKD but EKP so you need to get your eyes tested!!!!!!!!

you may find the shorter KTM throttle cables better, they are 6-8cm shorter. why not order new berg cables and LET US KNOW how suitable they are?

i have a 2 into 1 union for sale that i had made. PM me if interested.

Taffy
 
Hi Taffy,

thank you. In the next 2 hours I will spend some time on my Husa/Keihin.

Surely the carb is clean.

You´re right, the needle is EKP, I had a D in mind. Is it necessary to change also the needle? I have also another one and I have also got a #72 starter jet which is to be tested.

One more question: Can you tell me where I have to set "0.5 turns out"? I don´t find another screw or something that has to be setted. In the float chamber I only find
the main jet, the pilot jet and the starter jet. The fuel screw is at the bottom outside the carb, isn´t it?

If I need to buy some jets I would prefer buying them at a KTM dealer. I think at Yamaha they´re too expensive. But first the engine has to fire, after that I can do some fine tuning.

hribman
 
your making it tough

clean the carb if you didn't before!

yes change to the #72 starter jet. the EKP should be fine. the pilot screw is indeed outside and underneath the body of the carb. set to 1.5 turns out.

check you have a spark. check it's colour. is it dry or wet?

no throttle to start please!

a new plug?

if you have a dry plug, i have poured a thimble full of fuel down into the 'sock'.

don't take the piss out of yamaha-they were the only dealer to code and sell starter jets and coated needles so we should be pleased that we can buy this stuff.

what was the other needle you have? the two carbs have different shaped pilot jets.

regards

David Lloyd
 
Hi Guys!

Im a Berg-owner from Germany, and have also the Keihin FCR working in my Bike. But, as this is my first carburetor to adjust, so im not sure about my settings...:

Pilot: 42
Main: 162
Needle: OBEMR
Mainair: 200
other air i forgot ;), will look
Stroke of the acc.pump: ca. 0,5mm

This Setting is for an old 95er FE600.
Can u tell me, is there a big (jetting) difference between, for example, a 400 and 600ccm Model?
And do u have any tips for me for changes in my jetting? (Please keep in mind its an 1995 Model)
I feel like i should go a little leaner with the Pilotjet, maybe 40. Also, perhaps the Mainjet could be a little richer.
And with the needle im absolutly not sure...
The Spark is a bit sooty, but is this perhaps because of the acc.pump, and im running too lean (I need much less fuel compared to the dellortho!)?
Who knows something about jetting this nearly-oldtimer :) ?
Hope u have something to laugh with my english hehe
Greets from Blackwoodforrest, Germany,
Leon
 
Hi Leon,

I see you´re from Germany too. Maybe we can talk on the phone, it´easier in german.
Explaining technical details in english isn´t too easy for me.
My FE 501 runs very good with a #180 main jet.
Your needle and Pilot #42 should be ok, but try it with a smaller one.

greetings from the Ruhrgebiet

Michael
 
nezbert

your jetting sounds just about right. far better that you say what noises or stutters the engine has or makes etc etc. you're in the ballpark as they say!

Taffy
 
Wow you are fast!

Hribman, you will soon have a personal message!

Taffy,

"far better that you say what noises or stutters the engine has or makes etc etc."

That sentence was hard for me. Does it mean, in other words:
It would have been better to say what noises or stutters the engine has or makes...

"you're in the ballpark as they say!"

i thought we were talking about motorcycles, and now u confuse me with ballgames? And who says that? ;)
No, just joking, it means roughly right, right? :)

Ok, translation done.
Noises, hmm, it backfires a little when closing the throttle, wich would mean it runs to lean, right? But, as hotter it gets, the more it tends to start hard and to stall.
I have registered no stuttering so far...

Another impression i have is that:
The Power seems to be concentrated in the "half open throttle - 3/4 open throttle". It is no big difference between 3/4 open to WOT. -> Bigger MJ?
Or should i change the needle?
Thx so far!
 
yes, correct on all things english there. in fact it's better than mine!

i don't think you'll need a bigger MJ but if you do a MJ test that will chnage the fuel the bike reciieves in midrange and 1/4 throttle etc.

far bettr to stick a new MJ in and go try, if it's worse then go the other way. i've had those symptoms for both lean and rich.

if the bike stalls when hot it may be because you have an old plug in the engine. if not try turning the fuel screw out .5 of a turn.

regards


Taffy
 
I have a 172 MJ around here somewhere, will test the behaviour of the bike with this (probably to big) one.
Thx,
Leon
 
I'm riding a '04 Fe 650 and here are the jets I used:

48 pilot
Stock needle dropped one clip (richer)
2 turns out on the air fuel screw

The pipe is blueing a bit, so I assume it still too lean but its really fast...

Morgan
 
Hi guys,

I resurrected my enginge. ;-)
First I thought it had some other reason because of not firing (damaged ignition or spark plug), so I installed the dellorto carb
for riding some laps on the moto x track.
When I was home I tried to get the right set up to the keihin.
I don´t know what was the glory inspiration, but suddenly the enginge started up and I was happy. I have to refer that I have disassembled the low pressure diaphragm (?) which Yamaha uses for something. I also closed the junction, so the engine can´t take "wrong air".

Now I use following jets:

- PJ #48
- MJ #180
- starter jet #85 (the #72 also works, but I think #85 is better)
Engine starts without choke. I hope the re-starter will also work in
every situation. Next test ride is coming soon.

Thanks for your tips

greetings

hribman
 
Hi guys,

I have a new question about the Keihin-
engine runs good and even the electrical starter works very good after installing
the Kokusan ignition. Now it´s almost perfect. Yes: almost.

My spark plug is black coloured, so the engine runs a bit too rich.
What can I change at the Keihin carb? The needle is a OBDXM.
What does that mean? In this topic I read everyone has got a different needle.
I changed the clip position to 2nd from top. I think I need a thicker needle but which code should it have?
Some guys told me I should use a OBDTM or so, is that right?

thanks and greetings

hribman
 
Hi Hribman!

I have recently bought a OBDVT needle from www.mh-motorräder.de, and the needle works very well!
I also have made some adjustments to (at?) the acc.pump. Now it is not activated by the vibrations of the engine anymore (before the engine went richer and richer when idling)

To your jetting, i would guess ure PJ is a little fat? Here are my current jettings:

PJ: 42 (ca. 1 trun out)
Needle: OBDVT (3rd clip from above, but will change to 4th)
MJ: 172 (maybe 175 would be a tick better)
MAJ: 200
SAJ: 60
acc.pump: 0,5mm stroke

With this setting i get a grey plug, maybe a little too gry, but with needleclip raised on position it will be nearly perfect i think (ok i think that everytime when i change something ;) )
If anything is unclear, we can still pm in german if u like,
Greetings!
 
Hi!

Any news?

And another Question:

Taffy, you drive a 400ccm, i a 600ccm Berg, built in different years.
How far are the two bikes comparable?

You guys always compare your Bergs without telling anybody what year and Bore u have. Doesnt that matter?

Anyway, i drove a few miles on a highway, and maxspeed was 152km/h.
This was with Crosstires, Some Bridgestone in the front, Michelin S12 with nearly no profile left on the other end.
Secondary gearing: 15/42

Should it go faster? I know, top-speed doesnt matter, but its an indicator for correct jetting, isnt it...

I think its again time for another needle :D , the DVT seems to be a little lean.

Greetings, Leon
 

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