Question about 1992 Honda CB 750 Nighthawk

1 Answer

Honda 750 stalls if throttle is opened unless choke is on.

My 1992 Honda Nighthawk starts up pretty easily but even when it is fully warmed up the engine wants to stall as so as I open the throttle, even slowly, unless the choke is on.

Posted by doctordhd on

  • Anonymous Mar 13, 2014

    my honda izy starts on full throttle and ticks over when i rev it up it stalls

×

Ad

1 Answer

Anonymous

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    New Friend:

    An expert that has 1 follower.

  • Expert
  • 52 Answers

Hmm , sounds like a vacuum leak, check all the hoses, and the rubber intake manifolds and clamps

Posted on Jun 18, 2009

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

1992 Honda CB 250 Nighthawk only runs with choke on


Hi, Gracie 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. Vacuum line from the petcock to intake manifold cracked.
5. Float needle and seat sticking.
6. Float level too low.
7. Carburetor bowl vent line clogged/blocked/pinched.
8. Idle adjusting screw set too low.
9. Air/fuel mixture screw set too lean.
10. Idle port, transfer ports, slow air jet clogged.
11. Slow fuel jet clogged.
12. Faulty fuel pump.
For more information about your issue and valuable "Free" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
rebel 250 idles only on choke and dies when give it some throttle
Oakys Garage Carb clean Pilot Jet clogged Won run without Choke Carbs 101
Honda CB250 Shop Manual
https://www.partsfish.com/page/oem-parts-for-honda
Honda CB250 Nighthawk Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


Oct 21, 2012 | 1992 Honda CB 250 Nighthawk

1 Answer

My 1996 VF 750 C Magna starts fine with the choke open. After a minute or so as I reduce the choke and try to open the throttle, the engine just stalls out. Cannot seem to get the throttle to control


I think you are mixed up. The choke is usually closed to start a cold engine and opened once the motor warms up. The choke is closed to restrict the air flow and make the mixture richer in fuel. You can't open a choke that's already open. It's stalling because it's starved of fuel. Either a blockage or the fuel pump is not supplying enough gas.

May 06, 2012 | 1996 Honda VF 750 C Magna

1 Answer

95 honda civic engine bogs down highway speed full throttle


is there a rattle under the car like the cat converter is bad when was the fuel filter last replaced

Apr 28, 2012 | Cars & Trucks

1 Answer

1984 Honda CB 700 SC Nighthawk needs a new clutch


Hi, 1elitelandsc for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Honda, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Motorcycle Clutch Plates for Honda Nighthawk 700S eBay
85 Honda Nighthawk Clutch Slave Cylinder Rebuild
Honda 1992 CB750F2 Service Manual
https://www.partsfish.com/page/oem-parts-for-honda
Honda CB750 Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


Dec 27, 2017 | 1984 Honda CB 700 SC Nighthawk

1 Answer

1992 Honda CB 750 Nighthawk quits running under load


Hi, Dave and the usual suspects are:
1. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead-acid batteries.
2. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, stator, magneto, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Faulty neutral, side stand or clutch lever safety switch.
10. Faulty or corroded kill switch.
11. Accelerator pump damaged or not working.
12. Water or dirt in the fuel system, carburetor or filter.
13. Restricted, blocked or kinked fuel line.
14. Fuel tank empty.
15. The gas cap is not venting properly or fuel tank venting system blocked, loosen gas cap and go for a test ride.
16. A failed fuel pump, pressure regulator and or fuel injectors.
17. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
18. Needle and seat stuck closed in the float bowl.
19. Petcock clogged or damaged.
20. Lean angle switch is faulty or needs adjustment.
21. Catastrophic engine failure, perform a compression test.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
1991 CB750 Nighthawk is idling rough and dies at stop
78 cb750 having problems idles but stalls with throttle
Honda 1992 CB750F2 Service Manual
https://www.partsfish.com/page/oem-parts-for-honda
Honda CB750F2 Owner Manual Page 3

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Jul 17, 2011 | 1992 Honda CB 750 Nighthawk

1 Answer

1992 Honda CB 750 Nighthawk will not idle without choke


Hi, Emeraldcp 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. Vacuum line from the petcock to intake manifold cracked.
5. Float needle and seat sticking.
6. Float level too low.
7. Carburetor bowl vent line clogged/blocked/pinched.
8. Idle adjusting screw set too low.
9. Air/fuel mixture screw set too lean.
10. Idle port, transfer ports, slow air jet clogged.
11. Slow fuel jet clogged.
12. Faulty fuel pump.
13. Faulty auto choke or wiring connection.
For more information about your issue and valuable "Free" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Bike won Run without Choke
Oakys Garage Carb clean Pilot Jet clogged Won run without Choke Carbs 101
Honda Nighthawk CB 750 1991 Service Manual
https://www.partsfish.com/page/oem-parts-for-honda
Honda CB750F2 Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


Sep 26, 2010 | 1992 Honda CB 750 Nighthawk

1 Answer

How to remove and inspect throttle body on 1992 mazda miata


Things that make your engine do what it is doing.

1. Vacuum leak
2. EGR valve

Find the vacuum leak if there is one.. and check the function of your EGR valve.

A functioning EGR valve with an ORAL vacuum line suction test will cause the engine to stall / die when suction is applied to the ORAL external line.

Even if it passes the ORAL test... it can still have carbon build inside the plumbing that does not allow the seating pin to fully seat and the engine will surge or be hard to start when warm.

So check / listen carefully for vacuum leaks and check the EGR valve.

Feb 10, 2010 | 1992 Mazda MX-5

1 Answer

Motorbike stalls when openeing throttle or turning choke off.


You've most likely got plugged up carburetor jets. The openings in the jets are so small that it can be very difficult to tell when they're plugged up - and this makes them clogg very easily, too.
The only other possible cause of the trouble you describe would be an air leak between the carburetor and the engine, a leak at the head gasket or cylinder base gasket, or a leaking crankshaft seal.

Nov 03, 2009 | Honda NSR 125 Motorcycles

1 Answer

1991 Honda 750 Nighthawk...been running great. Hadn't ridden it much last 30 days or so...got on it tonight, noticed a sluggish throttle. Initially, there was slight black smoke coming from the exhaust....


carb. needs to be rebuilt sounds like trash in the float body or in the needles try using some sea foam in the gas tank (if u get it to start again) it has probably fouled out the plugs

Nov 02, 2009 | 1992 Honda CB 750 Nighthawk

Not finding what you are looking for?
1992 Honda CB 750 Nighthawk Logo

Related Topics:

1,232 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honda Experts

Arnie Burke
Arnie Burke

Level 3 Expert

6232 Answers

Marvin
Marvin

Level 3 Expert

85231 Answers

richard libby

Level 2 Expert

209 Answers

Are you a Honda Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...