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98 FE501 Jetting Update

S

steve

Joined May 2002
2K Posts | 141+
Snowy Mountains NSW Australia
Here is an update following on from Taffy's latest recommendations made here.
http://www.husaberg.org/index.php?name= ... 1988#41988

Below is a list of what I have now. Its taken me a few weeks because since Taff's encouragement I've had to work and stuff, but I found some time last weekend, so here it is what I now have. Still work in progress

1998 FE501 fitted with Ex WR400 FCR 39 with the \'wheel collar\' or \'block connector\' used for the Taffy mod to limit the stroke of the accelerator pump.
Altitude - 800m
Pilot Jet - 38
Main Jet - 155
Needle - EKQ, clip 2 from top
Pilot Air Screw/Jet - 60,
Main Air Jet - 160,
Starter Jet - 80
Fuel Screw - 1 1/8
Float - 9mm
Accelerator Pump - 0.2 mm stroke

It now starts with the choke, which it never did before no matter what starter jet I had in it. Needle is great. I had 2 stalls which seemed like a lean stumble condition form closed throttle, with clutch, off idle so pilot and/or FS needs a little work. I note that I also needed the hot start occasionaly which I hadn't previously which suggests it’s a bit rich. I'll try pilot up and down and see where that takes me.

Thanks Taff, you do know what you are on about

http://www.husaberg.org/index.php?set_a ... _photo.php

Steve
 
cheers steve!

i would think lifting the needle a clip will really help 4th gear drive from deep. please try it. this will help get rid of a slight bog. you're needle is too deep in the pot at present i think (just asking you to try here ok?) so raise it up one clip. if you like it you can try a second raising to c4.

didn't know that you were running the 160MAJ that i used in the WR! i tried a 180MAJ on 29/6/04 and did a dyno day a bit later so i threw everything around and then went back to the std 200MAJ.

all it means is that you are running slightly richer after maximum power.

if the needle isn't better lifting it then try the PS which will be better .5 turn further out.

how long does it need on choke before she 8-strokes or is it ok?

regards

taffy
 
Hi Taff,

I'll have another play next chance I get, probably after Christmas and before New Year. Need to put a day aside with no distractions. Done 2 cold starts so far, the first was 1st kick, the 2nd 5th kick. Got to learn to start it again. Ambient temp was quite high, 30 + deg so not a full test of cold starting yet. Time to 8 stroking isn't yet tested as once it was running for about 3-5 secs I just turned the choke off.

I did start with the needle on the middle clip. Leaning did seem to crispen up the mid a bit but I ran out of time to experiemnt more.

You are the man

Steve
 
steve said:
Hi Taff,
Time to 8 stroking isn't yet tested as once it was running for about 3-5 secs I just turned the choke off.

Steve
Click to expand...

you just answered it steve! can go to smaller choke jet if needs be but this is the one where you will start it first time but have to put the choke in after a mere few seconds. you then (if not riding it) will have flat spots as you rev to warm it up for a few moments. if you are riding it it'll be fine after 50 yards.

try that PS out .5 a turn and take the needle back to C2 if you're happy. it's up to you.

whenever i'm working on forks (my learning area) i cut 'n paste to a word doc and then take the sheet of paper with me.

regards

Taffy
 
Hi Taffy,

Did some more setup last weekend and found that the fuel screw was best at about 7/8 so screwed in a 35 pilot and got the fuel screw out to 1 3/4. Played with the needle clip and stayed at 2.

Overall, ist the best its ever been. No stalls, other than rider error, responds instantly to throttle. Probably about 10-15 % better than the previous setup with the ELN and definately mcuh better now that it starts with the choke.

1998 FE501 fitted with Ex WR400 FCR 39 with the \'wheel collar\' or \'block connector\' used for the Taffy mod to limit the stroke of the accelerator pump.
Altitude - 800m
Pilot Jet - 35
Main Jet - 155
Needle - EKQ, clip 2 from top
Pilot Air Screw/Jet - 60,
Main Air Jet - 160,
Starter Jet - 80
Fuel Screw - 1 3/4
Float - 9mm
Accelerator Pump - 0.2 mm stroke

http://www.husaberg.org/index.php?set_a ... _photo.php

There may still be an opportunity to got leaner on the main, but I'll have my new 07 FE 650 on Friday and I got Dale's jet kit for it in the mail yesterday so I may be a little preoccupied with that for a while.

Thanks Taff
Steve
 
Taff,

What I was trying to say was that its now EKQ with 155 main and 35 pilot following your latest input, updated from the ELN I used previously with a 165 main and 38 pilot.

Steve
 
that's good!

looking at it i would say that you're pretty much there now. it might take a 150 but you need to be so careful. try that and remember that you're testing at the very top - nowhere else!!!!!!

then test it with the needle back on c3. the lineaweaver needle will be slightly better at 1/4 throttle but nothing else will need changing - just the needle.

tell me about the choke and how many kicks sometime?

mine starts first kick or takes a while because i've set it rich for enduro racing. MUST START FIRST KICK! choke off within 30 yards and a bit hesitant for the next 50 - then you're away!

you may even find you're adjusting the idle speed over the next month.

anyway, thank god i got it right with someone! so many people have failed to get through the tunnel of thorn and blamed it on their special climate that i thought i'd never get there!

john! are you reading this?

regards

Taffy
 
Taffy said:
that's good!

looking at it i would say that you're pretty much there now. it might take a 150 but you need to be so careful. try that and remember that you're testing at the very top - nowhere else!!!!!!

then test it with the needle back on c3. the lineaweaver needle will be slightly better at 1/4 throttle but nothing else will need changing - just the needle.

tell me about the choke and how many kicks sometime?

mine starts first kick or takes a while because i've set it rich for enduro racing. MUST START FIRST KICK! choke off within 30 yards and a bit hesitant for the next 50 - then you're away!

you may even find you're adjusting the idle speed over the next month.

anyway, thank god i got it right with someone! so many people have failed to get through the tunnel of thorn and blamed it on their special climate that i thought i'd never get there!

john! are you reading this?

regards

Taffy
Click to expand...

John who? 8) I freely admit my jetting was not done on a dyno. Maybe it is just my bike, but the thing runs so hot already that jetting on the razor's edge just does not work for me. Also, most of my riding is done on the pilot and needle anyway, mostly due to the tight and technical terrain I prefer to ride.

Signed,
Rich but happy
 
Hi Taffy,

Starting from cold, so far down to about 15 deg C ambient is about 4-5 kicks with no response, no cough, nothing and then it bursts to life on the next kick. Kill the enrichener after5 secs and after the first few 100 m it responds cleanly, althoiugh no revs until warmed up after a few minutes.

I'm a bit like John in that, I don't use full throttle much. I like technical stuff, 2nd and 3rd gear with the clutch so I want a clean predictable throtle response with no flame outs/stalls from a closed throttle. Fast open stuff for me is a transport stage.

It worked really well before in this environment with about 120 km from the 8.5 l tank. It works even better now, not night and day, but definately better response to opening the throttle, with no surprises, linear and entirely predictable, lovely. Close throttle and it doesn't run on at all, just goes imediately back to idle. Not sure what the economy is now, but presumably a bit better due to leaner settings and virtually no accelerator pump.

Like I said before, you are the man.
Thanks
Steve
 
try a new plug sometime. one uncontaminated EVER by soot. try and get the nippon IXU24 or the DPR from NGK. prefer the nippon.

then we'll see what she's really like first thing!

regards

Taffy
 
Hi Taffy,

Tried the NGK option yesterday. Hadn't started for 3 weeks, 4th kick, full choke, fires up, so I'd say similar to the CR8EK that was in there. I few cold starts next weeknd will tell more.

Hot continues to be 1 - 2 kicks.

Jetting is great.

Steve
 

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