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Old 03-04-2013, 10:01 PM   #1246
ER70S-2
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Quote:
Originally Posted by joefromsf View Post
That's what I get for trying to answer from memory. So it ends before the battery. I was right about venting to air though.
Close enough.
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"BTW, I don't do style. It's a dirt bike, not some girlie dress-up thing." -
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Old 03-04-2013, 10:02 PM   #1247
motolab
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Quote:
Originally Posted by joefromsf View Post
It doesn't connect to anything. It vents to air and is routed inside the outer frame back past the battery. It ends just past the battery.
Interesting that CARB allows anything that vents fuel to go to the atmosphere. I would not have expected that.

Regards,

Derek
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Old 03-06-2013, 10:12 AM   #1248
rockscrambler
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thanks again guys
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Old 03-07-2013, 09:00 AM   #1249
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Quote:
Originally Posted by ER70S-2 View Post
This one:


Goes here: Pay attention, the photos will mislead you. The 1st pic shows the hose goes to the left, the second shows the hose comes in from the left (backwards).

That's how my 640 Enduro is set up.
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Old 03-13-2013, 08:57 PM   #1250
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Thanks Laramie! I have only one question; can I substitute wine for the beer? I'm thinking that margheritas and carburetor work might not be a good match.
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Old 03-13-2013, 11:24 PM   #1251
wrk2surf
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Quote:
Originally Posted by motolab View Post
Unless I misunderstood rockscrambler's post, he had already identified the petcock vacuum line.

Regards,

Derek

P.S.: What's "205d" mean?

its some long story of a guy telling a story the second time.. ior something along those lines...long story short. you answer a quesion just before someone else has or post something that seems new but someone has beaten you to the punch...

By the way Derek thank you so much for the racing support I will be working on the bike for the next month and will update you!
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Old 03-26-2013, 01:38 PM   #1252
Sane
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Hello mates! I got Aprilia Pegaso,1994.,with two BST 33 carbs,and i am wondering,is this the right way to set float heigts??

http://www.apriliaforum.com/forums/s...hlight=jetting

Any sudgestions on how to properly clean an adjust these carbs?

Much obliged
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Old 04-01-2013, 03:56 PM   #1253
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AHHHHHHHHHHHHHHHH! wicked thread, but i need help with the state of my carb!

got the carb completely disassembled, and i took notes as to what seemed to be missing in comparison to the bst-40 bible.

i have no washer on the needle, aside from the white plastic one. the needle has only one ring for the snap ring to pop into, thus only offering one height.

i have no float weight on my float, just some clip assembly.
i have no needle valve, period. space was empty.

the idle jet is marked at 42.5, will need to increase to 47.5 with the airbox mod and new jet?
the main jet was marked with, from what i can tell, -782M(some box thing)Y-5
the o-ring for the main jet looks like there are 3 gouges out of them, though i am not certain. should this o ring be super smooth?

well there you have it. i have my bike inoperable, though i am nearing some measure of resolution with its fuel delivery system.
here's hoping i can get this carb in a happier state.

thanks a boatload for the info in this community everyone. its been cool


ps: i live at a really high elevation, do i want less gas/more gas to air ratio?
and furthermore, if i do the airbox mod, (allowing more air intake, nothing huge, just probly 600-800% bigger than the stock snorkel hole) would i want more fuel to air ratio regardless?
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Old 04-01-2013, 06:03 PM   #1254
theGrinch
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Quote:
Originally Posted by clicheche View Post
got the carb completely disassembled, and i took notes as to what seemed to be missing in comparison to the bst-40 bible.

i have no washer on the needle, aside from the white plastic one. the needle has only one ring for the snap ring to pop into, thus only offering one height.

i have no float weight on my float, just some clip assembly.
i have no needle valve, period. space was empty.

the idle jet is marked at 42.5, will need to increase to 47.5 with the airbox mod and new jet?
the main jet was marked with, from what i can tell, -782M(some box thing)Y-5
the o-ring for the main jet looks like there are 3 gouges out of them, though i am not certain. should this o ring be super smooth?

well there you have it. i have my bike inoperable, though i am nearing some measure of resolution with its fuel delivery system.
here's hoping i can get this carb in a happier state.

thanks a boatload for the info in this community everyone. its been cool


ps: i live at a really high elevation, do i want less gas/more gas to air ratio?
and furthermore, if i do the airbox mod, (allowing more air intake, nothing huge, just probly 600-800% bigger than the stock snorkel hole) would i want more fuel to air ratio regardless?
If you open the airbox you change the pressure and will need to open the exhaust. What exhaust are you running?
What bike?



.
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Who's the clueless noob?
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Old 04-01-2013, 06:11 PM   #1255
clicheche
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not sure what exhaust i'm running.
'07 suzuki dr650
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Old 04-01-2013, 06:45 PM   #1256
ER70S-2
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Quote:
Originally Posted by clicheche View Post
got the carb completely disassembled, and i took notes as to what seemed to be missing in comparison to the bst-40 bible.
The bible starts off with a KTM carb, also a BST-40. As you've found there are some differences.

Quote:
Originally Posted by clicheche View Post
i have no washer on the needle, aside from the white plastic one. the needle has only one ring for the snap ring to pop into, thus only offering one height.
Correct.

Quote:
Originally Posted by clicheche View Post
i have no float weight on my float, just some clip assembly.
i have no needle valve, period. space was empty.
It's hiding in here.


Quote:
Originally Posted by clicheche View Post
the idle jet is marked at 42.5, will need to increase to 47.5 with the airbox mod and new jet?
No, stay with the 42.5
Quote:
Originally Posted by clicheche View Post
the main jet was marked with, from what i can tell, -782M(some box thing)Y-5
Stock is a 140 and should be stamped on the jet. 150, 160 are common for a jet kit.
Quote:
Originally Posted by clicheche View Post
the o-ring for the main jet looks like there are 3 gouges out of them, though i am not certain. should this o ring be super smooth?
Some one else will have to help here. The main jet doesn't have an o-ring.

Quote:
Originally Posted by clicheche View Post
well there you have it. i have my bike inoperable, though i am nearing some measure of resolution with its fuel delivery system.
here's hoping i can get this carb in a happier state.

thanks a boatload for the info in this community everyone. its been cool
Hang in there, we'll get you through this.

Quote:
Originally Posted by clicheche View Post
ps: i live at a really high elevation, do i want less gas/more gas to air ratio?
Technically, you want the same ratio. Since we have less air at altitude, we need smaller jets.
Quote:
Originally Posted by clicheche View Post
and furthermore, if i do the airbox mod, (allowing more air intake, nothing huge, just probly 600-800% bigger than the stock snorkel hole) would i want more fuel to air ratio regardless?
How high? I live and ride at 6000+ feet. My DR runs better with a 135MJ here.

Don't worry about your exhaust for now, it's the least of the issues.

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2013 WR250R

SUZUKI DR650SE INFORMATION INDEX
Quote:
Originally Posted by Threewheelbonnie View Post
"BTW, I don't do style. It's a dirt bike, not some girlie dress-up thing." -
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Old 04-01-2013, 10:19 PM   #1257
clicheche
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just realized today it was a ktm carb!

noticed the hiding float weight. makes sense
leaving the fuel screw at 42.5 is fine for idling?
i noticed the stamp on the nut for the main jet, not on the jet itself. 140 it was.

the washer i said was for the main jet, was definitely for the jet slide support (white plastic piece), not the jet itself

i live @ 3500 feet above sea level.

i only cut out about 150% more of the initial air intake opening. did you do an air box mod?

any opinion on the premise of a k&n air filter for more air? would it help with the thinner air at high elevation?

i threw on one tiny washer against the needle spacer in the carb... hope it won't be too much of an issue. and i drilled out the slide for the slide suction to respond faster to throttle.

also put together this manual choke, as my cable was seized inside the carb.

everything's put back together, next up is the direct power to the headlight, and i'm about done for this year. changed the plugs as well.
the bike only had 12xxxkms on it. the plugs were black. not oily black, but burnt black... sign of being too rich right?

the largest exhaust hose from the carburetor, is it required to be that long? can i move it out of the way? for more air flow to the air box? i saw a post where someone moved it out of that area at any rate...

thanks a ton for the response, it gave me the go ahead to just check it out and go ahead. i had problems with it stalling and it had trouble starting from time to time. usually cold starts as usual. we'll see how it goes this year!
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Old 04-01-2013, 10:38 PM   #1258
clicheche
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petcock?

what is the petcock vacuum line for?
reason i ask, is i don't have a line coming out of the top of the carb... this a bad thing?
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Old 04-01-2013, 11:11 PM   #1259
ER70S-2
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Quote:
Originally Posted by clicheche View Post
just realized today it was a ktm carb!


Quote:
Originally Posted by clicheche View Post
leaving the fuel screw at 42.5 is fine for idling?
The 42.5 is stamped on the pilot jet. And, yes, the DR is happy with 42.5 in most applications. The fuel screw goes here (and isn't stamped with anything):


Quote:
Originally Posted by clicheche View Post
i noticed the stamp on the nut for the main jet, not on the jet itself. 140 it was.
The 140 is stamped directly on the jet.

Quote:
Originally Posted by clicheche View Post
the washer i said was for the main jet, was definitely for the jet slide support (white plastic piece), not the jet itself
I think you're talking about this o-ring. Look closely in the pic you can see the bumps that indent the o-ring. I just align the indents with the bumps.


Quote:
Originally Posted by clicheche View Post
i live @ 3500 feet above sea level.
I have to leave the state to get that LOW.

Quote:
Originally Posted by clicheche View Post
i only cut out about 150% more of the initial air intake opening. did you do an air box mod?
I cut a second hole in the top of my airbox, it's about the same size as the snorkel hole (and my snorkel is out).

Quote:
Originally Posted by clicheche View Post
any opinion on the premise of a k&n air filter for more air? would it help with the thinner air at high elevation?
I'm not a k&n fan. The k&n flows more air, it also flows more dust.

Quote:
Originally Posted by clicheche View Post
i threw on one tiny washer against the needle spacer in the carb... hope it won't be too much of an issue. and i drilled out the slide for the slide suction to respond faster to throttle.
You put the washer between the e-clip and the white plastic washer, right? In this gap (and then slid together). Derek will be along in a minute to tell you that you shouldn't have drilled the slide.


Quote:
Originally Posted by clicheche View Post
changed the plugs as well.
the bike only had 12xxxkms on it. the plugs were black. not oily black, but burnt black... sign of being too rich right?
Edited to correct terminology:
Yes, but your choke cold start enrichment plunger was stuck, correct?

Quote:
Originally Posted by clicheche View Post
the largest exhaust hose from the carburetor, is it required to be that long? can i move it out of the way? for more air flow to the air box? i saw a post where someone moved it out of that area at any rate...
I'm not a Suzuki engineer, I leave those things alone. My second airbox hole is behind that filter.


Quote:
Originally Posted by clicheche View Post
what is the petcock vacuum line for?
reason i ask, is i don't have a line coming out of the top of the carb... this a bad thing?
It's what opens the stock petcock to let gas flow. Does your petcock look exactly like this?


If it does, the little hose goes here:


Quote:
Originally Posted by clicheche View Post
thanks a ton for the response, it gave me the go ahead to just check it out and go ahead. we'll see how it goes this year!
You're welcome, have fun, ride safe.
__________________
2004 DR650: 62,400 miles
2013 WR250R

SUZUKI DR650SE INFORMATION INDEX
Quote:
Originally Posted by Threewheelbonnie View Post
"BTW, I don't do style. It's a dirt bike, not some girlie dress-up thing." -

ER70S-2 screwed with this post 04-02-2013 at 02:06 PM
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Old 04-02-2013, 12:29 AM   #1260
clicheche
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wicked thorough! unreal. thanks a trillion.

so shit. drilled the slide, hopefully it isn't the end of the world. i can always gung it up with some goop or something. why should one not drill it out? aside from the fact that suzuki engineers are much more inclined to know what the hell they're doing than me.

i did not place the washer between the white spacer washer and the snap ring. it's on the outside of the white spacer washer. i saw it that way on the bst-40 bible thread and thought that was the way to do it!

does this mean i'm taking it all apart again?
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