Be the first to answer Apr 23, 2014 2008 Yamaha Royal Star Venture. The original screws are terrible!! You can find manuals at emanualonline.com, which is a great resource I use. "Yes, I really didn't know how to adjust the carb fuel mixture. Also, keep an eye on the air filter condition and replace as needed. This adjustment process is also known as balancing the idle mixture. Drill a small hole in the cap and either wiggle the plug. (function (d, t) { Reinstalling the stock air box immediately solved that same problem, so I can deduce that a change in air flow and by association my fuel/air ration is the culprit. using the translucent hose the bowl drain is opened to reveal the level within the carb. Then close the fuel screw till you feel some resistance. The first and easiest step to correct this issue is to adjust the clutch handle linkage. However, I see a potential weak area to what you say. The easiest way to locate the carb is by finding out where the air filter is. #6 MSH , Nov 20, 2009 #7 MSH The Salt Joined: Mar 17, 2007 Oddometer: 3,301 Location: Utah Getting Things In Action. And your Issues with the electrical components of a bike can be caused by the regulator rectifier. You will have to adjust your idle speed when you're done more than likely but it won't effect your air/fuel mixture. Discussion in 'XJ Technical Chat' started by gremlin484, Jan 18, 2007. Take half a turn in each direction, try both clockwise and counterclockwise. References The right spark plug is fairly clean and smelled like gas, makes sense huh. Most air fuel mixture screws are located on the side of the carburetor, but it depends on the specific engine. Today begins the first in a two part series where we go into specific detain with regard to specific testing of the Star 650 carburetor and its components to ensure that it is working within operating parameters. You can have lots of things done incorrectly, and if someone didn't know better, while it wouldn't be at it's best, they'd think it was normal. Locate and remove the engine air filter and housing in order to access the carburetor. Turning it just of a turn can make a difference in how the bike starts and responds, so make one little change at a time. You have to this by ear. Now go to the right-side carb and screw the mixture screw in in half-turn increments until the engine starts running slower. As with any bike, keep up on general maintenance to keep the bike in good condition. On the other hand an air screw does have a direct effect on the air to fuel ratio in the pilot circuit. I removed the pair system on my B12 but it still did not get rid of the popping totally. Older model years will likely have higher mileage. // ]]>. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2023 wikiHow, Inc. All rights reserved. Looks like the carb holders (rubber boot between carb and engine) are dry rotted and may be letting in air. You need to go back to the middle after each turn. There can be issues with the timing chain tensioner allowing too much slack in the chain and allowing the timing to be off. Will adjusting the PMS setting to enrichen fuel mixture alleviate the problem or must I re-jet the carb? Please refer to the above whether you must turn the screw clockwise or anti clockwise. Also, you may want to do this in a secluded area. The mixture screws are under the float bowls on the engine side of the carbs. Speaking of carburetors, its worth noting that the V Star models have dual carburetors, which require some tuning and syncing. The final drive will need the oil changed regularly. Once youre done locating the screws, get a screwdriver and you can start adjusting. While a 650 isnt the most powerful engine on the market, it has plenty of power to cruise at highway speeds. dont blame the air filter tho , the factory air box is restrictive, KN is less. Step 2: Adjust the air fuel mixture. Set idle to an RPM that is low but still steady -- about 1000 RPM if you have a smooth-running bike. Discussion in 'Thumpers' started by chevsuz12, Nov 20, 2009. It controls the flow rate of the air being delivered to the perforated tube located just above (or attached to) the low-speed fuel jet or "Idle Jet". You may need a very short bit or driver if you want to reach it without rotating the carb while its on your bike. A rich carb can easily overheat, while a lean carb can rust in due time. Syncing refers to adjusting each carburetors idle to where they are synced. Keeping count just makes the process easier. I guess thats why you are Southseascycles.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. var s = d.getElementsByTagName(t)[0], n = d.createElement(t); Find the spot between rough and irregular. If the carbs have been worked on previously, they will probably already have had the covers removed. The dead cylinder method seems to have a dedicated following but I never use it either. The plug reading indicates the mixture at the last operating . X The Fuel Ratio screw is probably plugged. You wont get easily confused or overwhelmed if you take one step at a time so that you know how each change affects your bike. Warm-up engine for 5 minutes. Its a small, brass screw that can be easily turned with a flat-blade screwdriver. How do I adjust the idle on the 650 v-star classic. And saving gas now, thanks very much, it saved me some dollars. The basic process for adjusting an air fuel mixture screw is the same for all small engines, whether its on a car, motorcycle, or other type of engine. The idle screw is on the top of the carb, away from the engine. If you plan to sell it, just fiddle with the PMS, if that doesn't do it, try dialing in your accelerator pump. Normally, there are three screws on carbs, the air screw, the fuel screw, and the idle speed screw. The throttle cables seem OK. For example, you may have the right size pilot jet, but if the fuel screw is not properly set then it will not be giving you the best performance and can cause issues. Increase the idling with the help of idling screw. For you, its important to adjust the mixture on a running, warmed-up engine. Turn the screw clockwise, stop when the engine starts sounding rough. It is now down to a pleasing crackle which I can live with. There's not a lot of room to work and look. Truth is, these bikes are *incredibly* forgiving when it comes to jetting. Amongst these would also be a rebuild kit.The first test will be blowing air into the fuel line and turning the carbs over to see if it is blocked. While they arent overpowered, they do weigh over 500 pounds which can be a lot for a beginner. (No fuel injection, though!) Check if the needle is sticking in the carburetor. Now you are going to be loosening the mixture. Stock PMS screw cover location Aftermarket PMS installed, Turning In (clockwise) = Leaner - you are turning the taper of the screw into the opening and allowing less fuel to pass. As has been mentioned, the 650 has enough power and gearing to cruise on the highway. Under this condition, the engine will not start until the timing chain is repositioned and a new tensioner installed. Tightening the screw is also called making the fuel mixture leaner, which lowers the RPMs at which the engine idles. If you are interested in purchasing one, there are a few known issues to be aware of. Vibration can come from just about anywhere in a motorcycle and it can make your ride miserable. I got a carb rebuild kit, changed the float needle valve, cleaned carb and blew out the old jets cause they are not stock. The condition of the spark plug is indicative how well it is operating. A carb with a decreased flow of fuel is lean or made leaner. Research source, Tip: The factory position for most air fuel mixture screws is usually between 1.5 and 2.5 turns out from being screwed all the way in. I have freer flowing pipes on all these so the popping on decel can be a problem. Yamaha Road Star EFI; Yamaha V Star 1100; Yamaha V Star 650; Yamaha Road Star Warrior; Yamaha Raider; Yamaha Roadliner & Stratoliner; View All Shop By Bike; Tools; Maxair HellCat; Maxair Predator Pro Kit; Clearance; Sign In About Us Contact Us FAQs. My engine and idle are working fine. You are using an out of date browser. On the majority of engines that are normally aspirated, a common rule of thumb is to tighten the adjusting screw all the way in and then back it out two full turns. This is different than the idle adjuster, which adjusts the overall engine idle. Return the idle to specification with the idle adjuster. The left picture shows the needle shimmed with 2, #4 washers and the right shows the adjustable needles with the circle clip. You could find your engines exact AFR using a special meter, but this isnt really necessary unless you want to be ultra-precise, such as if youre. link to 6 Reasons Why Your Motorcycle Accelerates By Itself. Click here to learn how. Year, mods, jetting, needle clip, PMS turns? Turning it in reduces the fuel, which makes it leaner. Get it? Clean your air filter. It is common for previous owners to install aftermarket performance carburetor jets. A rough-sounding engine means that there is not enough fuel. Set the screw in the position where the engine idles most smoothly and doesnt sound rough or irregular to balance the fuel mixture so that the engine has an ideal air fuel ratio. Aside from these issues, another aspect to take note of is the fact that these motorcycles have a driveshaft in place of a chain. Easily tune and adjust your idle mixture without burning your hands or fumbling with a screwdriver. I am riding a 2001 Honda Shadow 1100 C2. Spark plugs are just one of the most crucial parts of your vehicles engine. It's always worked well for me. The safe bet is to go with OEM parts unless you are confident in your abilities.

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