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Carburetor Specifications (Read 2912 times)
Savage_Greg
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Carburetor Specifications
10/27/04 at 02:24:00
 
Great job, Susan.

Here are the carb jetting specs from the Suzuki Service Manual.....


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« Last Edit: 07/14/12 at 15:17:07 by Oldfeller »  


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Savage_Greg
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Re: Carb Specs.
Reply #1 - 10/31/04 at 04:23:53
 
Carb breakdown...

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Savage_Greg
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Re: Carb Specs.
Reply #2 - 10/31/04 at 06:34:04
 
Here are some close ups...




The Book calls the "float needle" a needle valve.


I don't know what that one jet is.  Choke circuit?




Last but definitely not least...
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Savage_Greg
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Re: Carb Specs.
Reply #3 - 11/03/04 at 15:48:49
 
rkutzner wrote on 12/31/69 at 16:00:11:
In the first chart is the 'pilot screw' the idle mixture screw setting?  If so, my 05 came from the factory a mere 1/8th out...backfiring all the way.  It is now at 1.5 turns out and running better.



Yep.  That's the one, but interestingly, and maybe because of small manufacturing differences, everyone seems to find their "happy place" at a different number of turns.  Mine seems to like 2 turns, but then all this could be affected by other jetting or engine changes.

I just condensed and posted the specs from the book...and we all know there is a plug over them anyway, so they don't intend for us to "need to know".
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Re: Carb Specs.
Reply #4 - 08/27/05 at 14:59:47
 
Are the carb settings correct? My wife's 2001 came with a shop manual and some of the specifications it gives for the carb are very different.

Mukuni BS40SS
(same for all 50 states)

Main jet                 #155*
Main air jet            0.6mm
jet needle             5C17
needle jet              x-6*
pilot jet                  #47.5*
pilot outlet            1.3mm
starter jet              #22.5
pilot air jet 1          #67.5
pilot air jet 2          2.0mm

The starred items are apparently extra precision types for emissions purposes.

Therefore if this is correct there is no need to rejet this model year as it already has the 155 jet. Right?

Derek

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Re: Carb Specs.
Reply #5 - 12/18/05 at 08:39:03
 
Greg_650 is right about the "happy place".  I've found the idle speed has an effect on backfiring under engine braking with closed throttle.  If too low I guess there's not enough vacuum to draw fuel resulting in an unburnt lean mixture collecting and then igniting in the exhaust.  If I set the air screw for max idle rpm (1.5 to 2 turns out) it backfires more.  My sweet spot is 2.5 turns out then turning up the idle screw to compensate.
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Re: Carb Specs.
Reply #6 - 12/21/05 at 08:36:30
 
Carburetors from 1986 to 1994 have the same model # BS40SS as later years but there is a difference between them. Aside from richer jetting, the jet needle is also different. It is adjustable with 3 settings for raising (leaner) the clip in the groove or lowering it (richer) to change the mixture. It still uses a white spacer.

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Re: Carb Specs.
Reply #7 - 12/22/05 at 05:37:37
 
rokrover wrote on 12/31/69 at 16:00:12:
Greg_650 is right about the "happy place".  I've found the idle speed has an effect on backfiring under engine braking with closed throttle.  If too low I guess there's not enough vacuum to draw fuel resulting in an unburnt lean mixture collecting and then igniting in the exhaust.  If I set the air screw for max idle rpm (1.5 to 2 turns out) it backfires more.  My sweet spot is 2.5 turns out then turning up the idle screw to compensate.



It is not the vacuum, but with the idle set higher than  normal there is more fuel available at that idle speed...the needle is lifted a little higher in the needle jet.
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Re: Carb Specs.
Reply #8 - 06/30/09 at 08:17:04
 
How do I get the idle mixture plug out to get to the screw? Thanks
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Yonuh Adisi FSO
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Re: Carb Specs.
Reply #9 - 06/30/09 at 12:16:54
 
Carefully drill the plug, then stick a sheet metal or other screw into the hole and yank the booger out. Be careful when drilling, the mixture screw is very soft brass you don't want to hit it with the drill bit.
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Re: Carb Specs.
Reply #10 - 02/14/11 at 06:16:41
 
What should the float height be on a 97 Savage LS650?
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Re: Carb Specs.
Reply #11 - 02/16/11 at 23:23:01
 
Float level is 1.06 to 1.114" for all models.

Easiest way to check, get a clear fuel hose that will fit the nipple on the bottom.  Hold it up along side of the carb.  Open the drain and fuel will go up in the tube.  put the petcock to prime and the fuel level should come up to the where the bowl meets the carb body.
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Re: Carb Specs.
Reply #12 - 07/13/11 at 12:58:18
 
Anyone have a pic of where these BOWL VENT hoses attach to if they are just breathers under the tank? They must be held in place somewhere.
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« Last Edit: 07/20/11 at 22:24:03 by RycaShawn »  
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OK.... so what's the
speed of dark?

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Re: Carb Specs.
Reply #13 - 07/13/11 at 13:41:26
 
Attach to nothing... open to atmosphere... Wink...
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Ludicrous Speed !... ... Huh...
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verslagen1
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Re: Carburetor Specifications
Reply #14 - 07/19/14 at 22:16:40
 
Todd James wrote on 07/19/14 at 22:08:55:
I replaced all of the external screws on my carburetor
with Allen head screws.
Here's a picture that shows the location, sizes, and
quantities of the screws.

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Carb_Screws_Web_001.jpg

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