Registration is fast and you can even login with social network accounts to sync your profiles and content. If I do that the motor doesn't want to start or stay running I'll take the carb off tomorrow to count to know for sure. To get the motor running I hard to turn the pilot screw out quite a bit, and turned the idle speed screw in quite a bit I didn't hook up an inductive tach to know what it is idling at, but does sound about right.

What should the idle speed adjustment screw initially be set at the one that has the black cable sheath with a knob you can twist easily?

I am using a slotted screw driver bit normally goes into a driver by hand. Yes I thought a good job clearing out all of the passages, but the carb was SO varnished up there could still be crap in the passage I put in the new pilot screw and turned it 2.

Installed the carb and worked on gett the motor started, so messed with the pilot screw Once I was through, the hole was actually smaller than the orifice, I could see some brass still there Under a bore scope, which magnifies pretty well, I could see the orifice wasn't boogered up. As far as the 5 turns, it is just a guess as I was doing this with the engine running and getting my hands burned I'll take off the carb after work to see actually how many turns I'm out currently.

Right now it takes a lot of cranking to get it running and messing with choke. When warmed up it revs easy enough I'm not riding it yet, just neutralwhen i left off the gas and let it idle a bit then turn it off it back fires through the exhaust if that is helpful information. What do you think of the following to adjust the idle mixture ie pilot screw?

Assuming I find a way to turn the pilot screw without burning myself anymore. NOTE: I'm not seeing a fuel pump mentioned in the service manual When on PRI just gravity fed. UGH just rethinking the vacuum port on the carb Just checked the pilot screw of turns out and it was only 3. I must have turned it in to try to get it to lean out then back out until it sounded better and ended up at 3.

I'm going through the carb one more time cleaning out the ports again Looking at the gas I'm seeing a yellow tinge, like the color of cadmium plated parts, so fuel might be an issue too Also looking at the idle speed screw and cam under the black plate, it doesn't seem like I screwed in the idle speed screw much at all.

When I raise it, it seems to me that it would lower the level of fuel, right? As it is closer to the bottom. We'll see tomorrow how it behaves. Ok put the carb back on with pilot screw set at 3.

Put the fuel pet cock to PRI for about 10 seconds and tried I don't have a functioning inductive style tachometer to know my true RPM Thanks Dave, will try that saturdayRemember Me?

2006 Suzuki QuadSport® Z50

Results 1 to 1 of 1. To keep a four-stroke engine from stumbling all over itself, engineers designed a separate carburetor inside the main body.

This secondary carburetor has its own air and fuel circuit and controls how the bike runs off idle and on into the midrange. Considering that most of racing takes place while you're on the gas and thus on the carburetor's needle and main jet circuitsthe fuel mixture circuit might seem to be of little importance.

Au Contraire. It is very important even though it comes into play off idle. If the fuel mixture is miss-adjusted, your bike will run rough and stumble across the whole range. The adjustment of this circuit is so crucial that there are both external and internal ways to tune it.

suzuki quadsport 50 carb adjustment

Under the slide. The secondary carburetor starts at that little hole pointing straight back from the bottom behind the slide.

These holes channel air into the fuel mixture circuit where it is mixed with gas. This circuit controls how the bike runs off idle and into the midrange. It's adjusted by the fuel mixture screw--a tapered needle that opens or closes the flow of mixed air and gas. You turn it. By turning the screw in and out, it's possible to adjust how much fuel mixes with the air racing down the bypass hole.

Two-strokes have air screws. Four-strokes have fuel screws. The air screw is on the side of the carburetor and meters the amount of air that makes it to the pilot jet nozzle. At low rpm, four-strokes create less engine vacuum than two-strokes. It's the vacuum created by the engine that sucks fuel out of the float bowl and into the engine. By metering fuel, which is easier to draw though the orifices with low vacuum pressure, a four-stroke is able to start easier and run cleanly at its very low rpm idle speed.

That is just another name for the fuel screw. Forget it! Fuel is not gasoline. It is the combination of gasoline and air mixed together.


Gasoline, while highly volatile, couldn't be a fuel without air. It is possible for a four-stroke to have an air screw. Many vintage thumpers used two-stroke carbs--and thus have air screws. Here is how you can tell if the carburetor has a fuel mixture or air mixture screw.

An air screw meters air before it reaches the pilot jet. Turning an air screw in restricts the air flow and richens the mixture turning it out leans the mixture by letting more air in.Why don't fictional characters say "goodbye" when they hang up a phone? What evidence does Coutu use to support her claim that improvisation requires resilience. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.

Hottest Questions. Previously Viewed. Unanswered Questions. Suzuki Motorcycles. How do you tighten a chain on a Suzuki lt 50? Wiki User There are four 4 8mm bolts that hold the rear axle assembly onto the chasis.

Pilot Air/Fuel Screw Adjustment Explained - Single Carb - Part 1

Loosen all four bolts. The chain adjusters are located on the two bottom bolts. Turn the chain adjuster nut 6mm on the chain adjuster clockwise to tighten the chain making sure that you are evenly adjusting each adjuster the same to keep the axle square to the frame. It has an automatic chain tensioner.

I believe the alt is 3 wheels and the lt is 4. Not Asked in Suzuki Motorcycles How do you derestrict suzuki lt 80 quad? How can restrict a suzuki lt80 transport. Asked in Suzuki How do you derestrict suzuki lt 50 quad? Take the washer out in the exhaust Regards, Crimpy There is also a re stricter in the intake Asked in WWE Smackdown vs. Raw How do you drag people on svr ? Lt and Lb What is the valve clearence for a lt Asked in Suzuki, Suzuki Motorcycles How do you adjust chain on lt ef suzuki quadrunner?

I think all were inside carrier mounts to frame.Registration is fast and you can even login with social network accounts to sync your profiles and content. I'm trying to fix my atv that had been sitting for awhile and wouldn't start. First I drained and cleaned the fuel tank and pitcock and checked for good fuel flow.

Next I pulled the carb. The unit will start and idle fine but will not rev up unless I partialy block the throat of the carb. Please help I've run out of ideas. So far I have only found 1 adj screw that seems to only effect the low speed circuit. Is there another adjustment i may be overlooking.

Give Cheriah a PM she is excellent with carbs! Also see if Oxidized Black has a shop manual for your bike. Yeah tonight is name dropping! Make sure you have the air filter on when checking your carb.

Carburetor for Suzuki LT80 Quadsport ATV

That is why you have to block the carb intake because with the air filter on it is going to change the amount of air it will take in. To My Quad Repair. Yeah I've already tried it with the air filter and air filter box cover back on. You can post now and register later. If you have an account, sign in now to post with your account. Note: Your post will require moderator approval before it will be visible. Paste as plain text instead. Only 75 emoji are allowed.

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Do you own an ATV? Join our Forum! Recommended Posts. Posted May 15, Share this post Link to post Share on other sites. The air fuel. Posted May 15, edited.

Edited May 15, by abobeau.Your question may be answered by sellers, manufacturers, or customers who purchased this item, who are all part of the Amazon community. Please make sure that you are posting in the form of a question. Please enter a question. Installing a jet kit in your carb is the best way to get the maximum performance and longest life out of your bike. The stock carburetor from the factory is designed to meet Import Regulations Once you install or modify an exhaust or intake, you have put your bike into a leaner condition that will eventually destroy your engine due to heat from running lean.

If you notice any popping, you are extremely lean. Our jet kit provides the parts and installation instructions to enrich all the circuits in the carb, to fix this problem, and add performance you can feel in the seat. This is a comprehensive jet kit, addressing all throttle positions, throttle response, and each kit is custom made to your bike and its modifications. Longer Engine Life- The jet kit is a performance upgrade that allows the engine to run cooler which increases engine component life.

Lower EGT's exhaust gas temperatures If you have installed an aftermarket, or modified the stock exhaust or intake, this is needed or you will damage your engine.

Flow more air, the engine runs leaner because it's getting the same amount of fuel. Running lean causes detonation and hotter EGT's which ruin exhaust valves and destroy engines.

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suzuki quadsport 50 carb adjustment

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Any body know the basic settings for LT50 carb? I have an 85 LT On the side of the carb there are two screws. One goes into the side of the slide throat, and the other, a little larger, is on the motor side of the slide.

Technical Details

The first one seems to be a slide stop, controling idle speed. The other one does not seem to make much difference, unless I screw it all the way in, and then it will die.

But from like a quarter turn out, to one and three quarter turns out, it barely seems to make much difference. What are the basic settings supposed to be? By the way, it seems to be best at about half to three quarters out I think. But like I said, it's hard to tell. Re: Any body know the basic settings for LT50 carb? I think generally speaking, you want it to be between 1 and 2.

Is the LT50 a 4 stroke? I can't remember. Anyway, if it's a 2 stroke it's the air screw, if it's a 4 stroke it's the fuel screw, and yeah what my bro said.

All Things Moto! All times are GMT The time now is AM. Contact Us - All Things Moto! Dirtbike Forums Portal - Top. All Right Reserved. User Name. Remember Me? Mark Forums Read. Thread Tools. Thanks guys. Similar Threads for: Any body know the basic settings for LT50 carb? Basic Settings for CR85 Lightweight. Newb with '85 LT50 - basic questions. Discussion Topic 1: Basic Camera Settings. LinkBack URL. About LinkBacks.Carburetor adjustment does not require an engineering degree, but some mechanical ability is necessary.

Whether it is a stock or aftermarket carburetor, you will need to consider the temperature, altitude and humidity as these can have an effect on how well it is set up.

These environmental factors determine how the fuel-to-air mixture runs through the carburetor. For example, in a higher altitude there is less air for your motor and the fuel-to-air mixture will be richer.

suzuki quadsport 50 carb adjustment

Thus, your carburetor will need to be adjusted to accomodate less air in the atmosphere. Adjust the idle speed by locating the small spring-loaded screw which is usually located next to the throttle control. If you have a tachometer, turn the screw until you reach an idle speed between and rpm.

If you do not have a tachometer, set it for a low idle speed; not so slow that the engine stumbles or stalls, but not so fast that the clutch won't try to engage and move the vehicle forward. Adjust the fuel-to-air ratio FTA by locating the slotted idle mixture screw near the air-cleaner side of the carburetor.

With the engine off, turn the screw all the way in counting the number of turns it takes. This is your baseline, if you are not happy with the adjustments.

Turn the screw back to the baseline, start the engine and let it warm up for five to ten minutes. Count how many turns this takes. Divide this number in half to find out where the optimal point is. Turn the screw in that number of turns. You may have to go back and adjust the idle speed screw if the idle is now too fast. Based in New Jersey, Tamara Walton has been writing articles and poetry since Her articles have appeared in "Bowhunter" magazine and her poetry in anthologies published by the Library of Congress.

Items you will need Screwdrivers Carburetor needle Tachometer. About the Author. Photo Credits.