Ltz 400 valve issues

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Suzuki LTZ-400 Specs and Review

Suzuki LTZ Problems. Hey guys, I am on a couple other forums researching this problem, but you guys seem to be a bigger forum and not restricted to one state like the others I am on. What I am gonna do is just copy what I've said in my other forums and I really hope I can get some insight from you guys here as to what my problem is with this quad!

Thanks in advance guys. Here it starts, this is over the past 4 days Well got the old fuel out, and new spark plug in and it fired up right away, ran for 30 seconds then died.

Something is up with the carburetor. It's not getting fuel into the cylinder so we have to tear into that the next couple days and figure out why it is doing that. Hopefully it's just dirty or clogged or something, we got fuel once, didn't have the spark plug in and it came shooting out the top of the block but we couldn't get it to do it again. Any one have any idea what it could be at all? Got home, tried some other stuff, then came up with this: Got home.

Turned the key on, started right up. Ran realll rough. Like how it pulsates and wants to die because it goes into such a low idle and that was with the throttle half way in steady and if I just let it idle it would die. It was spitting black smoke too. Not alot, but just little clouds. I checked the fuel hose coming from the petcock.

Clear as day. Played with the idle a little wouldn't keep it running.

ltz 400 valve issues

Then it died and wouldn't start back up. It seems to start within the first couple seconds whenever it sits for a little while like a few hours.Portal Forums Photo Gallery.

ltz 400 valve issues

KFX Valve adjust help! Hey guys, I haveve a question about the valve adjustment on a KFX I know what the clearences are, however I'm not sure which timing mark to line it up with TDC. Also is this bike a "wet" ignition so that I'll have to drain the oil before I pull the case off? Or does the little site hole work effectively? If anyone has the process outlined, it would be greatly appreciated. TIA Tim. Re: KFX Valve adjust help! Here you go. No problem.

Also make sure the Cams are in the 10 and 2 oclock position before you take your reading. Just keep going around till they're at that position on TDC. Good job LoKi! I didn't even know we had that stuff in here. Good to know. Also welcome to the site. Thanks for the welcome! My buddy has had the quad for almost 2 years and never adjusted them. I could've slapped him silly. You guys think that an adjustment is all it needs. They were clacking pretty loud.

It quiets down when warm and it does fire right up. That's a long time to wait before checking the valves. Hopefully he didn't tweak the valves. Which, could lead to more complications and big bucks down the road. He should have checked them after the first month, and every 6 months after.

One of the biggest issues with these 4 strokes now days is not having the correct valve clearance. All times are GMT The time now is PM. Contact Us - All Things Moto! Dirtbike Forums Portal - Top. All Right Reserved.Registration is fast and you can even login with social network accounts to sync your profiles and content. Yes, definately, it your vavles aren't seating properly, compression will pass by.

One way to check your head and vavles for leaks, is to pour water into the intake and exhuast ports and see if the liquid leaks past the vavles, and how quickly if it does. If your vavles are adjusted too tight, it will cause the same problem. Just because the piston and rings look ok, doesn't mean that they are. You should measure the cylinder bore with a micrometer to check for wear and to make sure it is still round. The piston itself should be measured for the same things.

IMO, even if the piston and cylinder don't show excessive wear, the rings should be replaced anyway if the motor is more than a few years old. Also if your vavle have hit the piston, the structural integrity of the piston could be comprimised and should probably just be replaced.

If it breaks while the motor is running, the damage could be pretty bad. We will always be happy to try and answer any questions you have, but I still strongly believe that you should have a service manual at your side when you do this type of work to the motor.

I may just be beating a dead horse here, but I think you would find alot of helpful info in there. Either way, good luck, and I hope you can get your quad up and running soon. I know how much it sucks to have a machine out of commission. BTW, I edited your post, please try not to use inappropriate language in the general forums. I know alot of other sites don't have much in the way of language rules, but we try to keep this one as PG as possible.

There is a forum here dedicated to more "adult" themed discussion, you can basically say what you want in there. I have also merged your "compression problem" thread into this one, please try to keep things consolidated into one thread unless the subject matter is completely different.

Not only does this help cut down on clutter in the forum, but you will get better input, if everyone can see all of the responses to the same question in one thread as opposed to posting the same question in two or more threads. Once again, good luch getting your quad fixed. Messed up when merging your threads, accidentally moved everything into the timing chain thread. Made this new thread and left your timing chain thread by itself, since it is of a different subject matter.

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ltz 400 valve issues

Posted February 25, edited.Its user-friendly design is appropriate for multiple applications, including off-roading, racing and motocross. The Suzuki LT-Z features a dry-sump liquid-cooled single-cylinder four-valve engine with a dual overhead camshaft and a compression ratio of It has a Mikuni BSR36 carburetor.

It has a 90mm bore with a It has a transistorized ignition and an electronic starter. It has a five-speed transmission and the fuel tank has a capacity of 2. The front brakes are twin hydraulic disc brakes and the rear brakes are single hydraulic disc. The front suspension is an independent double A-arm five-way adjustable preload with 8. The rear suspension is a gas- and oil-damped linkage-type fully adjustable spring preload with adjustable compression and rebound damping.

It has 9. Overall, this ATV measures 72 inches long by The seat height is The dry weight is pounds and the wheelbase measures 49 inches. The front tires have a diameter of 22 inches, with a width of 7 inches and a rim diameter of 10 inches. The rear tires have a diameter of 20 inches, with a width of 10 inches and a rim diameter of 9 inches. This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.

2005 Suzuki QuadSport® Z400

To submit your questions or ideas, or to simply learn more about It Still Works, contact us. About the Author This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.The Suzuki Z earned it's reputation of being an all-around top performer by being equally impressive on trails, sand dunes and on the race track.

The Z provides ample four-wheel fun for the experienced rider. Key features of the Suzuki Quadsport z include aggressive bodywork with high fenders and specially designed air intake vents to improve airflow to the radiator.

The Suzuki ATV also sported a distinctive color pattern, blue and yellow white also availableand a lot of optional high performance aftermarket Z parts were available. From the Z's compact lightweight cc 4-stroke, single-cylinder, liquid-cooled engine to it's lightweight, high tensile steel-alloy frame and removable steel sub-frame this Suzuki ATV screams of fun.

The Suzuki QuadSport Z all-terrain vehicle is manufactured by Suzuki and is designed for riders 16 years of age or older. Suzuki z top speed is 70 MPH. Higher speeds can be attained after installing high performance parts however 70 MPH is the stock speed rating.

Several factors greatly affect speed such as condition and tuning of the engine, altitude and wind conditions. Suzuki believes strongly in safety and offers to pay for rider training courses to anyone 16 years or older wanting to take them. They refer riders to a local Suzuki dealer and arrange for the classes to be taken, very few other types of products can say that about a manufacturer.

Of all the ATV brandsSuzuki is a leader in being proactive about safety. Some manufacturer data sheets specify 0w40 which works just as well but the general consensus is that, in warmer climates especially, 10w40 is the way to go. Fully synthetic oil is not required unless high performance parts have upgraded the power output of your z or if it has already switched to synthetic. Once a change to synthetic is made it's not recommended that you alternate back to regular oil. ATV value is dependent on condition, age and upgrades if any.

If you want to valuate your z for sale purposes you can read more about ATV values. Will Suzuki ever produce another Z model? They haven't said they wouldn't but it will depend on market demand. I hope you found this Suzuki LTZ quad review helpful.

The Suzuki LTZ all-terrain vehicle weighs lbs Several marketplaces carry z quad parts. We've found a great selection online, at fair prices, new from motosport. Back to Top View Sitemap. Overall Width : mm Overall Height : mm Seat Height : mm Ground Clearance : mm Wheelbase : mm Color : Yellow, White z Oil capacity and type - 2.Registration is fast and you can even login with social network accounts to sync your profiles and content.

I need to put new valves both on intake and exhaust side bc my valve lash clearance was 0. In order to put new Valves in, can I use old shims or do I need new ones? New springs also? Have U tried adjusting them first? With new valves and seats u will probably be wise to pick up a shim kit! I did try to adjust them, they were off by a lot and the intake valve keeper broke off which damaged the valve stem.

So I got 4 new valves just to be on the safe side. The stock ones aren't as durable I've read. Got kibblewhites. 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. Display as a link instead.

Suzuki LTZ 400 Specifications

Clear editor. Upload or insert images from URL. Not a member? Suzuki ATV Forum. Search In. Do you own an ATV? Join our Forum! Recommended Posts. Posted February 25, Share this post Link to post Share on other sites.

Posted February 28, Posted March 1, Join the conversation You can post now and register later. Reply to this topicRemember Me? 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.

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. Conversely, a fuel mixture screw meters gas after it has been mixed with air, thus it works the opposite of an air screw. Turning the fuel screw out lets more fuel into the engine and creates a richer mixture.


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