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December 3rd, 2005, 08:53 AM   #1
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stock jetting for a 2005 fe 650 e in usa

perhaps some one can enlighten me.we just prepped a new 2005 fe 650e.pipes started discoloring immediately.we jet all the bikes we sell, but the stock jetting in this model baffles me.it had a 38 pilot,160 main and the needle was set on the 2nd from leanest position.a 550 comes with a 182 main ,needle in the third from leanest position.a 450 comes with a 180 main.why do we gat a 160 main in the 650?dan.
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December 3rd, 2005, 09:21 AM   #2
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Re: stock jetting for a 2005 fe 650 e in usa

I have purchased a couple euro spec fe550e that BMG received,I understood they received some bikes set up for euro street legal emissions compliance. If your fe650e comes with switch gear for turn sigs and possibly even a mesh screen over the exhaust outlet you have one of these bikes.Check with Bob at BMG for the conversion info......nsman
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December 3rd, 2005, 10:20 AM   #3
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Re: stock jetting for a 2005 fe 650 e in usa

thanx for the reply.but this bike is a us spec bike with none of those euro parts.this bike is so lean stock that i wonder if engine damage would result if oerated with out re jetting.the parts manual does say a 160 main jet.dan.
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December 3rd, 2005, 10:51 AM   #4
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Re: stock jetting for a 2005 fe 650 e in usa

US specification OEM "Jetting" is very lean indeed!

Most US dealers install "Euro-Spec" jetting in order to make the bike somewhat rideable. How do I know? I suggested it.

Why the big bike has a smaller jet:
All else remaining equal a larger displacement increases Venturi signal providing more fuel through a given orifice.

For the life of me I do not understand why it is so difficult to spend an additional $100.00 on a "Proper" Jet Kit.
Is it the lack of 'Blingability?"

Lack of Blingability = Not visible to the naked eye.

Note:
With a proper "metering rod" profile the 650 often performs best with a #145 - #150 main jet.

Close Vs Correct:
http://www.husaberg.org/modules.php?nam ... pic&t=2957

Kind Regards,
Dale

PS
Good talking with you the other day Dan. Always a pleasure.
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December 3rd, 2005, 12:17 PM   #5
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Re: stock jetting for a 2005 fe 650 e in usa

I have Dale's jet kit in my '05 FE 650E & it starts & runs great!!
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December 3rd, 2005, 12:34 PM   #6
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Re: stock jetting for a 2005 fe 650 e in usa

Originally Posted by rancheroracer
I have Dale's jet kit in my '05 FE 650E & it starts & runs great!!
Thank You!

Most of us work hard for a hundred bucks! I know I do.

My point:
Why purchase a Ducati only to shod it with Chengshin rubber?

Dale
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December 3rd, 2005, 02:48 PM   #7
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Re: stock jetting for a 2005 fe 650 e in usa

I will be getting an 06 fe-650 hopefully in the near future and i am very interested in the jet kit if the stock jetting is way off. I think it would be a worthwhile investment to make it run and start the way it is supposed too.
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December 3rd, 2005, 06:46 PM   #8
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Re: stock jetting for a 2005 fe 650 e in usa

Originally Posted by LINEAWEAVER

All else remaining equal a larger displacement increases Venturi signal providing more fuel through a given orifice.


For the life of me I do not understand why it is so difficult to spend an additional $100.00 on a "Proper" Jet Kit.
Is it the lack of 'Blingability?"

Lack of Blingability = Not visible to the naked eye.

Note:
With a proper "metering rod" profile the 650 often performs best with a #145 - #150 main jet.

Kind Regards,
Dale
$100 is fair price for a good dialed in needle and jet recomendations. however my bling kit is low on funds currently. good thing Dan's shop jetting mix is working good on my FE450e. that 45 PJ you gave me Dan will do for summer. Right now the 48pj and 1.5 turns on the FS works good at 2500-5500 feet. More fuel screw opening for sea level is about right. I don't even know what main jet and clip setting Dan put me on, I forgot. The bike sings, no bogs, no poping, good power, smooth sounds.

I can add this: yes..." flow thru an orifice is directly proportional to the size of the orifice and the pressure difference across the orifice" - some basic engineering jargon for ya, but why a 550 uses a bigger main jet then a 450, which is true of the Husky 450/510 bikes as well, but then at the FE650 size displacement it needs a smaller jet??....must be something like Dale says. something about the draw from the big 650 and its carb set up that they need to go a smaller main jets.

a dirt bike carb is just a big control device. Very interesting learning about them........I know only a little based on web site reading and tinkeriing with my husky FCR.
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December 4th, 2005, 07:49 AM   #9
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Re: stock jetting for a 2005 fe 650 e in usa

big bob

there is no way your bike needs a 45 or a 48 PJ unless the air jet is ridiculously large or that the needle straight code is over an 'R' at either 'S' or 'T'.

i've set up 4 bikes now with leaner PJ and PAJ and all reacted better to 35/38/40 PJ with the correct PAJ. APJ disconnected or with the "Taff Mod" done.

pipe discolouration can be down to any part of the jetting range being lean, it can be down to port design, valve timing, ignition timing even, cam timing. cheap fuel is another one!!!!!

the 160MJ is fine!

the reason a 450 may have a smaller MJ is because it's breathing through a smaller carb. this brings the air speed back up and sends a stronger signal to the MJ. therefore you jet DOWN and not up!

i am presently running a 148MJ on a 400 with a 39mm carb. the bike is a rocket! it loses out on bottom end arm-ripping stuff but it revs so quickly that there can't be a lot in it!

regards

Taffy
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December 4th, 2005, 09:17 AM   #10
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Re: stock jetting for a 2005 fe 650 e in usa

Is there actually a unique kit for proper jetting the Husabergs or is it just a matter of using the appropriate pilot and main jet numbers?

Yes the Bergs come stock jetted very lean and geared very tall to pass arbitrary government emissions and noise tests. Lucky for us the factory also included in the box an extra set of richer jets to be installed after the sale by the dealer. Running the bike with the extra lean jets already installed stock should be avoided.

For the FS650's I think they come stock with a 38PJ and 158MJ (I forget) but the extra jet kit in the box from the factory should include a 48PJ and a 180MJ.
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