Recently put a spike air cleaner on my vstar 650 2014 custom, it dies on full throttle, so i asumi g i use the big hole jet i got with the kit.tho there is a big hole jet and a smaller hole jet..Do i

Lindsey... your problem is the classic issue with plugged jets. Specifically the low speed speed (pilot) jets are clogged. With the carb removed and the float bowl removed, and the float also removed, you'll see generally two sets of jets. Usually the one in the center is the main jet and has a larger hole and that jet doesn't usually clog but to be sure remove it and inspect the opening. If you can't see light then it's clogged. The more suspect issue is the pilot (low speed jet), usually off to the side. This jet, once removed has a longer body and this is the jet that is clogged. Perform the same "look thru" and you'll see no light or very little. When this jet clogs it displays the symptoms you mention. As you give the bike throttle, transition from idle thru low speed and then to main jet occurs, based on rpm and throttle demand. The pilot jet doesn't allow transition and the bike falters from about 2000 to 5/6 k rpm.

So how to clean. I've tried acetylene torch tip cleaners but most are too big. If you have an air compressor, try blowing high pressure air thru the jet and it may clear. The ultimate fall back is a chemical clean. Place the jet in a ultrasonic tank or purchase Berryman's carb cleaner in a small tank (1 gallon) (Auto Zone or internet)http://www.amazon.com/Berryman-0996-Chem-Dip-Carburetor-Cleaner/dp/B00DSMEL2A/ref=sr_1_1?s=automotive&ie=UTF8&qid=1419804749&sr=1-1&keywords=berrymans+carb+cleaner
and soak the jets in it. Here's another potential problem... the pilot hole in the body of the carb may also be plugged so while at it disassemble the soft parts from the carb and treat the carb body (no soft parts) also in the carb cleaner. Usually about 1 - 2 hrs soak removes the clog. Best to clean all holes in the carb body with high-pressure air. Since you have a four cylinder then you must perform the same exercise 4x. This will solve your problem...

Good Luck... Dio

you have a sticking float in the carburater you will have to get a carb kit for some carb cleaner any local auto store take off cleanit then let it soak in the cleaner 3 hrs hers the big you need a air compresser to blow air threw the carb little holes and big holes put it back to gather throw out gas install new gas and sea foam injecter cleaner 2 capsfull in the full tank you should be ready togo and have more power to

If you rejet, you need to do BOTH carbs.

Remove the carb, then the float bowl at the bottom of the carb then clean the carb with spray carb cleaner. Spray into each and every drill hole and jet you can find. Use goggles so you don't accidently get cleaner in your eyes. Please, rate my answer, thanks. Reset the air and throttle screws, one and one half turns outward from a lightly seated position. Please, rate my answer. Thanks.

Remove and clean the carburetor. The problem is a plugged or partially plugged idle jet. There should be a throttle screw and an air screw on the side of the carb. The big screw is the throttle screw. Remove both screws and the float bowl and spray carb cleaner in all the holes and screens and jets to clean out the plug. Use goggles to avoid spray kicking back into your eyes. Put the two screws back in the hole each one came from and then turn them clockwise ubtil they LIGHTLY seat. Now open each of them one and one half turns.

Check the condition of the fuel line from inside the tank to the carburetor. Check tightness of all screws on the carburetor body. If no help, disassemble the carburetor and check the condition of the pumper valves and diaphragms. If looks dirty, clean with spray carburetor cleaner and blow out with compressed air (don't use cleaner on any rubber or plastic parts). Remove the H and L needles for cleaning and air blast. Preset the needles 1-1/2 turns CCW from CW stops (lightly). If the rubber parts are stiff, re-kit the carburetor. After engine warm--up, set full throttle and adjust H for highest speed, but 4-stroking. It should run smoothly with a light load (cutting). Set L for smooth idle but rich enough to allow the engine to follow the throttle. Set idle speed just below chain movement. Hope this gets you going again.

Sounds like dirt in the main jet of the carb. Take the slide out and clean the needle. The pull the float bowl and blow air or carb cleaner through the brass jet in the middle of the barb, where the needle seats.

hello and welcome
this is a very very commom problem after the cycle has gone over a storage period of anything over a month or so. what has happened is the deteriorated fuel has plugged the idle jet, and possibley other jetting. this is verified by pulling out the choke allows it to run. because this makes of for the loss of fuel the jets are not produceing. so to fix this you will need to remove the carbs and take out the jets and clean them thoroughly with a carb cleaner and possibly a very small gauge wire to break up builup. especially in the pilot jet. unfortunately fuel added carb cleaners dont seem to work for this kind of problem and to fix right they should be disassembled and cleaned thoroughly. thank you.