Question about 1990 kawasaki ZZR 1100

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Will start and run but needs loads more choke than normal.... then cuts out as soon as the throttle is opened. keeps doing this even when warm and normally wouldn't need choke. when the problem first started it started and ran perfect for 5 mins as normal and started as i was about to pull out onto the road

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  • joe May 11, 2010

    running on choke only is a sign of a dirty carburetor or dirt in the carb blocking the jet(s). when was the last time the carbs were cleaned?

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  • Master
  • 1,392 Answers

You need to clean your carbs. Something is gummed up inside. Most likely pilot jet, but need to clean and synchronize them.

Posted on Mar 07, 2009

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1 Answer

1993 ninja no power under load


could be the float , clean carb again . if it was me id check the compression , easy stuff first . then check the spark output to know if your getting weak spark after its warmed up . the service manual explains how to check the electrical system.

Nov 30, 2013 | kawasaki KX 125 Motorcycles

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Starts but takes a very long time to warm up. continually stalls when throttle applied. have to keep feathering throttle to keep running . spits ,sputters , backfires until fully warmed up


ColdI engines require a richer mixture to operate smoothly...so they have an enricher (aka choke).
If you are finding you need to keep the choke on longer.....you may have a lean mixture than normal.nother
Start by inspecting the carb and intake manifolds for any leaks (loose fittings....cracked hoses) that could be drawing in air, leaning the mixture.

Another common issue with bikes that have sat over winter...is plugged idle jets.....the fuel varnishes the tiny orifices in the carb. You could try a product like Seafoam in the fuel tank....run it abit to get the treated fuel in the carbs then let it sit overnight...allowing time for the chemical to work. Since the bike runs fine warm...this may clear things up for you.

Apr 05, 2011 | 2000 Yamaha V Star 1100 Classic

1 Answer

How do I start my new 2000 dyna super glide....


In most cases, if you'll make sure the fuel petcock is on (this should be vacuum controlled if it is the orginal petcock), pull the enricher out, twist the throttle twice, turn on the switch, and push the start button. DO NOT OPEN THE THROTTLE UNTIL THE ENIGNE STARTS UP. Your carburetor is equipped with an ENRICHER. An enricher circuit works differently from a "choke". If you open the throttle even a little while starting the bike, you'll render the enricher ineffective. You must leave the throttle completely closed until the engine starts up. Usually the enricher is rich enough that the engine goes to a high idle once it starts. But, on the other hand, you don't want to run the enricher for an extended time as it will foul your spark plugs. Allow the engine to run until it warms enough so that you can keep the engine running with the throttle then turn it off.

Good Luck
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Nov 29, 2010 | 2000 Harley Davidson FXD Dyna Super Glide

1 Answer

I have a 2003 ttr225 I can get the bike to start with the choke on ihave to let it warm up for an extremly long time before I can push in the choke . once the bike is warm and I hit the throttle hard ,...


Sounds like the idle circuit in the carb is restricted. The engine is running on the choke only. When the engine reaches a certain temp the fuelthat does get is more readily burned allowing you to back off the choke. The choke probsbly can't be completely opened? right? Fuel quality is also something to consider Oil content in fuel affects combustion temps and volatility. _good luck_Ned_



Nov 16, 2010 | 2003 Yamaha TT-R 225

1 Answer

Will only start and run with choke on. have to keep choke on even after thoughly warm and exaust pipe begins to turn red hot. engine wants to die


The pilot jet circuit is plugged up. Clean the carb. Remove the vacuum valve and keep it away from any spray. Remove the choke, air and throttle screws then spray into every hole you can find. The spray should go in one hole and come out another hole. Pay special attention to the jets. Important > count the number of turns inward to lightly seat the throttle and air screws. This is the number of turns you will need to open the screws after lightly seating them during re-assembly. Please rate my answer. Thanks.

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Aug 12, 2010 | 2007 kawasaki KLX 250

1 Answer

I recently purchased a 2002 lowrider with only319 miles on it obviously it has sat awhile. It has a hard time idling on initial warm up and when warmed up giving it a little throttle (not under load) it...


The bike may suffer from a combo of the gas going stale in the carb, and may have slightly clogged the small passageways, but if it starts and runs you are halfway there. Use some carb or fuel injection cleaner in the gas tank to help out there. As far as cold start, it may be from a lean condition form the factory, and the coughing and popping are symptomatic of that. If you have a good HD shop nearby, they should be able to change the slow speed up just a bit, to pretty much take care of the issue of coughing, popping and cold start issues. My bike was the same, I bumped the low speed jet up , but still have a cold blooded bike, it takes a while to run properly form cold start, and will pop if driven too soon or if it is cold out until she warms up good. Some advice for cold start, use the choke know as usual, then push in the choke as soon as you can, and use the throttle to keep RPMs up about 1000 using throttle lock to RPMs there. As the motor warms up RPMs will increase on their own and you can adjust the RPMs lower as motor warms using throttle and throttle lock. Use your hand to touch the heads, as the motor warms up you'll feel heat, when she's too hot too touch, she is ready to ride. See you in the wind.

Jun 24, 2010 | 2002 Harley Davidson FXDL Dyna Low Rider

1 Answer

Not warming up or keeping tickover keeps cutting out althoughnot


carb needs a clean , try fireing a bit of injector cleaner into the carb (remove airfilter and spray a little bit at a time !! then try again , if still no good the carb will need to come off and be cleaned ,
hope this helps
kind regards
bert31000

Mar 18, 2009 | 1990 Aprilia AF1 125 Futura

2 Answers

Engine cutting out with the choke off


Adjust your idle screw on your carb so that it gets more gas just sitting there at idle. Tighten the screw one and a quarter turn and then start the bike. Adjust the idle to where you think it sounds normal. If that doesnt work check your float in your float bowl, it might be stuck in the down position. Clean with some carb cleaner spray and make sure it moves freely before putting the float bowl back on, youll have to choke it or prime the carb again to get it started. All the choke does is let in more gas and oxegen so you might want to check how far the carbs close when you push the choke back in. Is it impeading any normal carb setting. Check that too. Good luck.

Dec 01, 2008 | 2004 Yamaha YZ 450 F

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