Question about Yamaha V Star 1100 Custom Motorcycles

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My 98 set up for about 3 months was running fine when i parked it now it runs fine at speed but it pops on the back carb when idleing but has no loss of power

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Check your intake manifolds for air leaks . You may have a cracked manifold or you may have to replace the sealing o-ring.

Posted on Sep 11, 2010

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Vanguard V Twin 18 hp. monted in Cushman Motor scooter, runs great at W.O.T and at on quarter throttle, misses at range inbetween


Sounds like your carb needs the fuel/air mix adjusted..uses all the gas at high speed but has excess at low speeds...find your adjusting screw and at med throttle slowly screw it clockwise until the engine starts to sputter then back it out until it starts to sputter again then continue to do this until you reach ideal mix where it runs the best it can..then go slowly through the throttle up and down..when set..unjust your idle speed screw to your ideal idle speed..if this dies not fix ..carb will bed cleaned or rebuilt. Good luck.. Note always push or pull your throttle handle slowly to position avoids gas load up causing sputter and backfire.

Mar 15, 2012 | Briggs & Stratton Briggs Stratton Vanguard...

2 Answers

Husqvarna 359: Has run fine for 3 years. Now when first starting idles fine but as soon as it warms up idle speed increases enough to continually engage the clutch. Carb. setting have never been changed...


I think an air leak and she is running lean. Maybe time for some pressure/vacuum testing. Continuing to tweak the carburetor may camouflage a larger problem until the saw fails.

If you have more questions or need additional help please reply below and I will get back to you. Thank you for using FixYa and Good Luck. HTH
Lou

Apr 05, 2010 | Husqvarna Chain Saw 20" Bar

2 Answers

I have a new Stihl FS90R Trimmer...Idles fine but dies when given gas to rev up. Tried to adjust the carb out. Did not help. I have two of these.Changed the carbs and the same thing happened. The same carb...


My nephew had a problem with his Stihl FS55R trimmer, sez it would run on high for a few then quit. Sez it restarts easy and runs on idle with no problem. I pulled carb & found fuel screen full of fine contaminant. This is the screen you see when you drop the bottom pan of the carb. (single screw does it). Reassembled and the trimmer runs on high speed w/o problems. If your primer bulb doesn't pop right back up when you punch it down, it means that the fuel can't get past that screen....

Nov 07, 2009 | Garden

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Need to adjust 3 screws. I already try to adjust them, but it runs too fast or dies. Cannot get it right. I know I have to turn in low and high all the way and then unscrew about 1 1/4 turn back. Where to...


ok here goes. you are write to wind out the screws 1 1/4 turns +/-

you have 2 scews for the carb jets, the other is the idle speed adjuster. it has a conical shaft which simply open the throtle more as you screw it in. wind this in so that it will run a bit fast . if you can, start the saw. Without pulling the throttle, slowly turn the "low" jet in , or out untill the saw runs faster. if it starts running too fast, adjust the idle speed scew down a little. do this untill it is running best. adjust the idle speed down until the cahin just stops moving. the low speed is now set. now pull the trigger and run the saw full throttle. adjust the "high" jet in or out slightly until it is running fastest. Note..if you turn either screw in too far, the engine will stall.

I hope this helps,

Another thing that could cause problems is if there is an air gap between the carb and the cylinder. check that fixing screws are tight. check that the gasket is ok. some saws have a small rubber manifold between the carb and the cylinder. if this manifold is perferated or damaged,it will let air into the engine, and therefore will not run right.
good luck.

Sep 19, 2009 | Garden

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Lean pop or only runs on back cylinder and front back fires


Exhaust 'pops' is generally caused by unburnt fuel igniting in the exhaust, air leaks can cause this too.
When you do any carb work its always best practice to check the carb balance and idle mixture settings.
What colour is the spark plug? http://www.dansmc.com/Spark_Plugs/Spark_Plugs_catalog.html

Jun 18, 2009 | 2005 Yamaha V Star Silverado

2 Answers

Have 1987 nissan sentra wagon 1.6 carb.engine the problem is an idle problem when I start in the morning or when its had time to cool down I depress the accelorator pedel to set the choke and high idle cam...


Check your Ignition timing before anything
check your plugs see what color they are
red or orange means carb is to lean , black
or oil means to rich then you can go from there
and set mixture screws on carb , let me no how you make out .

Mar 09, 2009 | 1987 Nissan Sentra Wagon

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