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Lineaweaver Jet Kit FE550

Joined Apr 2007
190 Posts | 1+
Gormley, Ontario, Canada
I ride mostly narrow trails and like the idea of not having
the accerator pump to avoid "running on the dribble".
Dale's recommended starting point:
Dale's needle with clip in groove #4,fuel screw at 1.5 turns out,
adjustable air jet at 0.5 turns out, 48 PJ and 160 MJ.
Accelerator pump deactivated.
This is too rich by far.
With the clip in groove #3 the bike runs better at half throttle.
Still too rich on the bottom. I have limited faith in the range of
the fuel screw as there is always some fuel coming through the
emulsion tube based on the needle shank diameter.
While I might reduce the fuel screw setting to 1 turn out,
I think the adjustable air screw should be opened up more
to lean it out off idle.
Does this make sense?
 
well either you are a bloody clairvoyent or you simply deny reading the doc and just about every post i've put up about the ubject.

to recap: i've been rattling on for month after month that the jetting should be 150-160MJ needle to suit, 35/38/40PJ and PAJ to suit. in the end with various americans mentioning that i've got it all wrong i recinded a fortnight ago and greed that you septics can have your 170MJ if you want it due to the special air that you breathn and the special fuel that you put in your bikes.

so what happens? three threads from the USA telling me that they run rich at 48???????? i think i'm overheating here!i may even blow a gasket.

i suggest that you read the doc. there you'll find that the jetting recommended by myself is as mentioned above. this can be confirmed by sparks and steve from oz.

so to recap
150MJ
needle to suit (WHY?)
38 PJ for the E series and a 35PJ for the D series
no apj or a 1 second squirt off the bottom.

the PJ to PAJ ratio is in the doc and was first established by moi (even though i say it myself!) and the 35 is 1/4 turn the 38 is 3/8 turn and the 40 is 1/2 a turn (which is where you're at right now but with a 48PJ instead).

anyway, sorry for the rant but as i often say; "can you keep up at the back please!"

regards

Taffy
 
I have read the doc, but it is often geared to the older bikes, and I am not sure how directly the info can be applied to the current machines. I should have asked: Can the 48PJ be accomodated with the adjustable air jet? Might it work at one turn out? I will experiment.
 
For the last 18 months I've been happily running a 38PJ, 158MJ, fuel screw 2 turns out, needle clip position #3 on a mildly modded 05 FS650E.

Grab a set of 38, 40, 42 and 45 Pilot Jets and experiment.
 
no it won't help.

the PA has little effect at the touch of the throttle. it is most effective just as it goes onto the needle so that you can feel it at say medium revs in 3rd/4th.

rich is rich as you come off the closed throttle i'm afraid. the patrick burns site is worth a visit for this. he does an excellent graph that truly describes the effect and when that the PA has.

http://www.factorypro.com/tech/carbkei.html

regards

Taffy
 
Re: RE: Lineaweaver Jet Kit FE550

Taffy said:
well either you are a bloody clairvoyent or you simply deny reading the doc and just about every post i've put up about the ubject.

with all due respect taffy, dale's jet kit may be slightly different than stock jetting equipment.

on my kit (purchased last year) dale's instructions gave an amount to turn the air bleed screw (an adjustable part he supplies to replace the stock non-adjustable air bleed screw), but it's hard to tell just when it's bottomed out, and i didn't want to force it.

i went with middle of the road settings on everything and spent an hour or so testing, gradually leaning out the air bleed screw until it was clearly too lean (bogging on quick throttle openings), then went back in slightly, then adjusted everything else from there.

i forget if my needle position was what he recommended or not. i don't remember changing it. since that day 1 1/2 years ago (4000 miles ago on that bike) i have not done anything to the jetting except minor air screw adjustment for winter when i moved to boise (3500' lower than ely).
 
RE: Re: RE: Lineaweaver Jet Kit FE550

Velo what did you wind up with as a fuel screw setting? Are you using the 48 pilot jet? Part of the difficulty in nailing down settings is that Dale's needle is hand made. There willl be slight variation from one to another.
 
RE: Re: RE: Lineaweaver Jet Kit FE550

there are no variations in dale's needles. just the bikes, the people and the countries to name but a few of the differences.

i accept that dale might recommend different settings velo, infact he does! but what you won't know is that when he sold his needle to me years ago i set the bike up and within a week of testing carefully and methodically, my PJ was back to as was. i announced that the 35PJ still worked a treat and dale modified his statement to customers to say that he recommended i think it was a 42 or a 45. however, a customer was having a torrid time setting up his bike and it unnerved dale a bit.

so he then announced that the 48PJ was 'waytago!' it's like a condom velo. it's safe!

regards

Taffy
 
RE: Re: RE: Lineaweaver Jet Kit FE550

I know this, a little leaner always brightens up my Husabergs.

It runs great fat as well but when I get it leaned out some......meaning its COLD outside...oh boy the brightness factor is sweet.

I should have raised my my clip one this summer. I'm too lazy. winter is coming/
 
Re: RE: Re: RE: Lineaweaver Jet Kit FE550

Neil_E. said:
Velo what did you wind up with as a fuel screw setting? Are you using the 48 pilot jet? Part of the difficulty in nailing down settings is that Dale's needle is hand made. There willl be slight variation from one to another.

good question. lol. somewhere in the 1.5-2.0 range. i think i'm using the 48 pj. whatever was stock.

i'm not really smart enough to know how much the air bleed adjustment affects the FS or pilot. once i got it working right (1 afternoon) i stopped messing with it. i had to go another half turn or so out on the FS when i moved to boise (and was riding at 2500' in below freezing temps), but that's all i've ever done after that first day of testing in 06.

if i were you, i would either open up the air bleed, or go to a smaller pilot, or try both, or something.

i admit, i'm not very sensitive to 4-stroke jetting tho. if it starts easily and runs well, i'm happy and i don't screw with it anymore.

i can't actually kickstart the berg right now (broken leg), so i've been riding my new 200xc-w the last month. when i get back from moab (leaving friday for a week) i'll probably ride the berg tho.
 
Hi Taffy,

you should change your name to "Don Qichote! :D

What´s about Oktoberfest this year? Starts at 22.9.!
 
no armin. i've stopped that foolishness ever since three years ago the security service jumped me and 'duffed' me up a little. i then lost my wallet two hours afterwards. i thought '43 - that's enough!!!!' grow up!

regards

Taffy
 

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