Question about 1989 Honda CBR 600 F Hurricane

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The motorcycle will only start if the choke is all the way on, and it dies if you take it off, it idles fine if it is on, but when you hit the gas the bike dies,unless you hit gas and take choke off at same time. what is the problem?

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A choke is designed to restrict air so that the mixture is rich (more fuel) for warm up. no choke should be used after 5 minutes or so. heres what you need to do. take the carb apart and on the bottom in the bowl of the carb are your jets make sure they are all clean and clear so that all circuits are open (quarter throttle, mid throttle and full throttle.) each jet controls parts of those three ranges. also turn your mixture screw which is usually located right under the motor sie of the carb. turn it all the way in then out 2 turns if you live in high elevation, turn it out only 1 turn and see how it all works. one last thing your problem might be solved by he second option first so try it first.

Posted on Jul 12, 2009

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1 Answer

Idles with 1/2 choke. If open choke, or throttle - engine dies without any RPM spike. Carb was cleaned, jet is clean. When idles, there is gas in the primer bulb.


Hi, Andrew and the usual suspects are:

1. Fuel cap or fuel tank is not venting properly.

2. Fuel filter clogged.

3. Fuel line pinched or kinked.

4. Float needle and seat sticking.

5. Float level too low.

6. Carburetor bowl vent line clogged/blocked/pinched.

7. Idle adjusting screw set too low.

8. Air/fuel mixture screw set too lean.

9. Idle port, transfer ports, slow air jet clogged.

10. Slow fuel jet clogged.

For more information about your issue and valuable free downloads that you will need please visit the websites below. Good luck and have a nice day.

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follow the cable from the start to finish it might have been bent or damaged. then have a look at the carbs they might have been damaged in the two accidents if the mix is wrong or they are letting in air

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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

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It starts and idles fine when you hit the throttle it dies


Howz ur choke set up, is it wide open when on cold start then u close it once it idles smoothly?
If yes then your choke system is at problem, else your power jets are your problem source. Have it a check out as it is more of gsping for air than anything else. Good luck.

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Have 2007 suzuki vinson quadrunner 500 4x4,only runs at idle with choke on ,has been sitting for year,new gas in it now.


Mine did the same thing. I took the air filter off and there was about a half inch of gas sitting in the bottom, so I just soked that up started the wheeler and covered the air hole w my hand and hit the gas. After that it started working. It died when I did that and then it started right up.

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You need to take off your carburetor , disassemble it, and clean the jets (specifically the slow jet) and the passageways in the carburetor body that feed the gas to the carburetor throat. Carefully set your air screw setting back to stock setting. and reassemble. Inspect the intake manifold and air box tubes for cracks and separations. That should get you idling again.

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The hot side is running way too lean. Have your carbs synchronized may help. Try draining the bowls. Good luck.

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1 Answer

Idles fine with or without choke - cannot


Few suggestions(if not checked already):
Holed or incorrectly seated diaphram?
Timing advance?
I Presume you have checked already the air correction and needle jets too.

Please get back to me if you require further asssistance.

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My yz2f0f starts/runs (idles) fine while being choked, once the choke is pushed in (turned off) and the engine is reved, it backfires and dies. This is all the while I am applying the throttle to keep the...


sounds like you might have some trash in carb being a clogged pilot or main or needle seat in not letting in the proper amount of gas check all passages and use fresh gas if it has been sitting

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