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carb problem

Started by jony_c, December 10, 2007, 10:40:15 PM

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jony_c

alright so before anyone here tells me im dumb here me out..


I have a problem with my bike (2000 gs) with the fuel, its not running right really rough, I have cleaned everything but I have not rebuilt the carbs.

today i took out the carbs and put them on my table took the top (black part) and the spring, spring seat, needle and a small oring came out. of both sides

i went to take the screws off the bottom of the carb as by the book and the site and I cannot get them loose there going to strip.  So I will wait until wednesday to do the work so I can have the proper bolts. Does anyone have a good way of getting these bolts out? and what size they are so I can  buy new ones?

the other issue is when I put it back together since everything just fell out. I put the needle in first then the small black oring then the spring seat is that configuration correct I cannot tell by the manual and the bike will not start when put back together due to what seems like a lack of fuel

guru's please help

ejudasf

You should also put a small dab of 2-cycle oil on parts.  I don't know why, but it is what seems to work.

resistor

I would suggest a bit of pen oil or something to try and get into those threads.. Then buy a impact screwdriver, it's the only way I was able to get the screws off of the bottom of my carbs.  Basically it's a screwdriver that you can hit on the top with a hammer, when contact is made with the hammer the screwdriver turns a bit, basically the impact and the turning of the screwdriver at the same time help to break screws free.  I found one at Harbor Freight for about 8 bucks.  Also make sure you use the best fitting screw tip to the screws on the bottom of the carbs to keep them from stripping.. Good luck!
Mods: Cobra F1S, K&N Filter, Jet Kit, Ignition Advancer, Higher Compression Head, Airtech Fairing, 14t, Laverda Bars, Eliminated Fender, Body Mounted Turn Signals

trumpetguy

+1 on the Harbor Freight Impact Screwdriver.  The philips tip it has included is also the right shape. 

For some stubborn carb screws, I have only been able to remove them by clamping tightly onto the outside of the head with 6-7" vice-grip pliers.  Once it cracks loose, the screwdriver does the trick easily.  It often saves ruining the screw head.

If you want some replacement screws, see my sig line.
TrumpetGuy
1998 Suzuki GS500E
1982 Suzuki GS1100E
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"Every gun that is made, every warship launched, every rocket fired signifies, in the final sense, a theft from those who hunger and are not fed, those who are cold and not clothed." -- Dwight D. Eisenhower

The Buddha

Rebuilding is a dumb word. you're not re building anything ... its just sounds all high and mighty for what is essentially a worthless job. 90% of the time on carbs its useless and not the problem.
You have carbs that leak, you replace O rings in them. Its basically got 6-7 ... that is replacing O rings, not a rebuild.
Anyway, being clean is fine, you got somehting else f*(ked up.
I hear so many stories about how this has been rebuilt or that has been rebuilt. Ask more Q's and you find out they swapped O rings. You ask more ... like Oh, it was leaking ??? they go, no, I just wanted to rebuild ...
Yea, I rebuild my bike last week. Whole bike.
Cool.
Srinath.
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bobthebiker

when a screw head is stripped for me, I just get out my dremel, the cuttting wheel and cut a flathead slot in the screw head. works EVERY time.  then when the screw is out, I replace with an allen screw for the future.
looking for a new vehicle again.

SmartDrug

Quote from: seshadri_srinath on December 11, 2007, 12:10:30 PM
Rebuilding is a dumb word. you're not re building anything ... its just sounds all high and mighty for what is essentially a worthless job. 90% of the time on carbs its useless and not the problem.
You have carbs that leak, you replace O rings in them. Its basically got 6-7 ... that is replacing O rings, not a rebuild.
Anyway, being clean is fine, you got somehting else f*(ked up.
I hear so many stories about how this has been rebuilt or that has been rebuilt. Ask more Q's and you find out they swapped O rings. You ask more ... like Oh, it was leaking ??? they go, no, I just wanted to rebuild ...
Yea, I rebuild my bike last week. Whole bike.
Cool.
Srinath.


You just seem to enjoy raining on everyone's parade lately, what happened to the Srinath that made handlebars and helped people with problems?  I understand that God created you to be the world's greatest mechanic and that for you, carbs are a walk in the park, I personally find them confusing as hell.  Either way, it sounds like he needs the carbs given a solid going over and rebuild.  You have to figure that the o rings are now 7+ years old and that rubber starts to wear depending on temperature and conditions, so a rebuild isn't a bad idea.  If you're incapable of doing it yourself, most dealerships will charge $30 per carb for a rebuild kit and $100 per carb to rebuild. If you can find someone on this board or a local site you might be able to have someone help you for a couple cases of beer. 

Alternatively, you might want to try new fuel, checking the fuel filter or making sure that the hoses are hooked up correctly.
NESBA #22
الكافرة مع بندقية سوداء
Aequitas - Veritas
KWS Superbike GSXR-1000
Honda S2000
Suzuki M109R

sledge

#7
First thing to do........get a set of screwdrivers that actually fit the screw-heads you find on Japanese bikes  :thumb:

You need JIS standard........like these..........http://centralhobbies.com/Tools/jis.html

If the screwhead has a dot punched into one of the quarters its JIS and you run the risk of rounding it off if you use a standard phillips/pozi/cross-head type screwdriver owing to the poor fit.

The Buddha

Yea smartie pants ...Srinath, the extra cranky - texas version.
OK fine screw it.
I am fixing carbs for people these days too (have 3 in various stages of done), just that idiots on other sites think they can rebuild stuff by replacing Orings. So, I decided that I rebuilt my whole seca by fitting new tires on it.
Also mikuni especially the GS mikuni carbs seem to have O rings that last for ever. They are also generic, except the float bowl one.
A Keihein CV or CVK ... abject misery every 2 years on the sucker, and worst of all, no rebuild kits for $15 or so, Individual parts to be sourced one at a time, and float bowl gasket - buy from honda only for the nighthawk. $35 each.
Yammie put paper Float gaskets in their bikes in the mid 80's. Never leaked really, will weep a little and then seal up shut. Great idea if you ask me.
Cool.
Srinath.
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ohgood

I'm going to jump in and defend the seshadri_srinath.

While it may seem he's calling _you_ dumb, I don't think that was the point. If you read your repair manual, it will state quite simply that the carburetors are rarely to blame. Eliminate the known causes before you start tearing apart the carburetors. I've seen a combination of water in the tank, an almost broken spark lead, and a crappy petcock myself.

Unless you're gushing gas or changed the exhaust there shouldn't be a need to re-jet or rebuild anything.

oh, and seshadri_srinath, why are you so grouchy since texas anyway? ;)


tt_four: "and believe me, BMW motorcycles are 50% metal, rubber and plastic, and 50% useless

X-ray

QuotePosted by: seshadri_srinath
So, I decided that I rebuilt my whole seca by fitting new tires on it.
:laugh:  :laugh:  :laugh:
'93 gs500 w/ Red Oxide primer paint job. Hasn't been on the road in years but wrenching on it is my escape.

The Buddha

You jet it if stock jetting is giving you trouble in various aspects.
You replace O rings when its leaking.
You rebuild it when like all the old metal is worn out and the carb has almost disintegrated ...  :laugh: ...
Remember ... all the metal is to be replaced with new metal - re building = new metal. Just like you rebuilt a head (new valves, seats etc = new metal).
Cool.
Srinath.

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The Buddha

Oh Yea ...
Why are many of the Katrina survivors depressed ???
They had to go to Houston.

Why did they say on the Apollo 13 "Houston we have a problem" ???
You'd obviously notify the place that created the problem right ...

Anyway, "God Bless Taxes" like they say around here.

Before we decide we have to pay Taxes to mexico I say.

Cool.
Srinath.
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