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Air intake problem or carburater problem?

My unicorn bike which makes a problem on acceleration & a sudden slow down of bike while on riding & engine off with in second ,if full acceleration is put on it may came back to normal state or engine off.If choke is put on the engine goes smooth.Is it problem of air intake or anything else?

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To adjust Air fuel screes you really need to know what your doing, You can mess everything up bad, If it was running ok before I would say the problem is somewhere else, and not mess with the fuel air screws, This is why there blocked off unless someone has removed the caps, Maybe try to Synk the carbs first and check for air leakes around the air boots, Also check the coils, Start the bike and lay your hand over the coils and see if you get a shock, If so Bad Coil

Posted on Jul 23, 2013

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Check there are no air leaks around where the air intake rubbers are at your carburetor. It sounds like your bike is running too lean or weak which means your air/fuel mixture is running on too much air and not enough fuel. This would explain it running smoothly when you put the choke on as the choke "chokes" the majority of the air from the carburetor and allows more fuel to flow through the carburetor creating a richer mixture. There will be a mixture screw somewhere on the carburetor which will allow you to either richen (more fuel and less air) or weaken (more air and less fuel) by turning the screw either in or out. Only adjust this by a small amount (about a quarter turn at most) at a time and try the bike to see how it rides each time. After adjusting the screw each time let the engine idle for about 30 seconds or so to let it settle to the new mixture setting before riding. There will be another screw on the carburetor which is your "idle" or "tick over"speed adjustment screw which adjusts how high your engine revs while the engine is "ticking over". Turn it in to increase idling speed and out to lower the idling speed. This will probably need adjusting as you change the fuel/air mixture. I hope this helps you and good luck :o)

Posted on Jul 17, 2013

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Posted on Jan 02, 2017

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SOURCE: Engine stalls

I assume your bike has been in storage for awhile...Your engine is running on choke ONLY, that's why when you cover the air inlet it's the same as what the choke does.....your jets in the carb are clogged and will facilitate a removal and cleaning of the carbs my friend.....find a trusted mechanic and you'll be rolling in no time...Good Luck to you......Tim

Posted on May 09, 2009

  • 1 Answer

SOURCE: Engine knocking problem of Honda Unicorn 2005 make

I too have a similar problem. I couldnt find any solution. If you have found it please let me know.

Posted on Jul 06, 2009

SOURCE: Engine gets off sudeenly while riding

There seems to be fuel stravation problem to the carburator....
Remove the carburator and thn remove the float bowl and clean the float pin and its passage...there could be some kind of dirt in the pathway and thus the obstruction of the fuel flow into the float chamber.
If your bike doesn't have an 'in-line' filter ....install one! this will help catch the dirt before it finds its way into the float chamber.

Hope this helps!

Posted on Oct 08, 2009

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SOURCE: I was riding my DR

The problem you describe could be several different things, however, I will post a solution for the most likely. The fact the the shut down occurs when you attempt to accelerate, indicates it is "starving", running out of fuel when you call for it. When you open the throttle, typically, you allow the engine to injest more fuel/air mix, thus the rpms go up. In your situation, your carb reponds to you opening the throttle by allowing more air, but the same amount of fuel, thus the mixture leans out, (too much air, not enough fuel to fire). The likely cause is an obstruction in the fuel delivery system. Could be a clogged fuel filter, trash in the fuel. A piece of trash in a carb jet. The fix is to check and clean everything in the lines, the filter, and possibly the carb. Hope this helps...GOOD LUCK!

Posted on Oct 16, 2009

Testimonial: "thanks, but this problem happens frequently I dont know what to do I always take it to the garage they clean it up and after one week the same happens"

  • 361 Answers

SOURCE: i have 99 sportster883- been sitting for a

the new fuels that we buy today only last around 6-8 weeks before they start to turn back to sugar. take the carbs off and clean and replace all of the jets. When u leave it next time use a stabliser in the gas

Posted on Apr 18, 2010

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