Question about Suzuki GSX 400 F Motorcycles

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Why would my 1989 gsx 400 f staves itself of fuel in high rev's ? can you help ?

I first thought it was my carbs so cleaned them and my jet's and not sure if the vacuum hose's but that seems fine but i dont think it run right when at 7000 rpm what do you think ?

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  • 141 Answers

Check your float lever.may be set to low.

Posted on Jun 12, 2014

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 23 Answers

SOURCE: my bike jerks at 6 to 7000 rpm when i drive it

it might be a sticky frotal

Posted on Dec 07, 2008

  • 3567 Answers

SOURCE: honda 750 shadow gas leak

It is a vent / overflow hose. It drains to the atmosphere / street. If gas is coming out and isn't stopping then a float is stuck.

Turn off the gas and drain the offending carb(s). Next, turn the gas back on and sharply tap the float bowl with the plastic handle of a screwdriver as the fuel bowl refills. The goal here is to vibrate the float to free it up. If doing this process a couple of times does not free the float I would remove the carb(s) and look for any misalignment of float pin, needle or adjusting tang.

Now re-clean with a spray carb cleaner. Clean the air filter then re-mount carb(s). Next, Remove the water trap bowl at the bottom of the petcock, (gas valve). Dump it, clean it and re-mount it, ( not all bikes have a trap bowl ). INSTALL AN IN-LINE FUEL FILTER..

Posted on Apr 09, 2009

crnckshft
  • 11 Answers

SOURCE: vacuum hose that attaches to the fuel petcock behind fuel line

my 81 xj750 vacumm line attaches to a pip on the boot that attches it to the head. Have you investigated to diaphram in your fuel pet ****. I know mine had a small pin hole which made my idle weak at times. i even went as far as resynching the carbs and changing the plugs before i found it . just enough to bleed off vacuum . Hope that helps

Posted on Jun 10, 2009

  • 3567 Answers

SOURCE: 1981 gl1100 has 4 keihin carbs bike sat 7 years

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648d54b.gifWhen removing the pilot jet screw, count the number of turns to remove. Put the screw back the same number of turns then unscrew 1/4 turn.
A “very helpful” rating on this answer? Thanks!

Posted on Jul 02, 2009

  • 70 Answers

SOURCE: 400 Eiger ATV, starts and runs fine, stalls the

If 2 stroke check crank seals, check plug cap for proper resistance,check for good fuel flow to carb.Spark should jump at least a 1/4" gap,NOT JUST the .030 or plug gap.

Posted on Sep 08, 2009

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1 Answer

1989 Suzuki GSX 750 F that won't idle below 3000 rpm


Hi, Suzuki #5 is jumping up and down waving the Suzuki flag screaming "pick me pick me" and the usual suspects are:
1. Throttle cables improperly adjusted, pinched or need lubrication.
2. Idle adjusting screw needs to be backed off.
4. Air fuel mixture adjusted too lean start with 2 full turns.
5. Intake system air leak, check intake boots with propane
6. Fast idle choke ramp is not releasing.
7. Broken throttle return spring.
8. Damaged diaphragm or slide.
9. Faulty MAP, TPS, ATS, O2, sensors or wiring/connector.
10. Multiple carburetors not in sync.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Can not get my idle below 3000rpm Suzuki GSX Motorcycle Forums Gixxer com
89 Suzuki Katana 600 High Idle Issue Sportbikes net
Suzuki 85 GSX R750 Service Repair Manual
OEM parts for Suzuki
http://mybikemanuals.com/suzuki/suzuki-gsx-owners-manuals

Jun 07, 2017 | 1989 Suzuki GSX 750 F (Katana)

1 Answer

Firing order 400


basic stuff, try the fuel filter if it has one, look for crimped lines or leaking connections. Your bike isn't getting the fuel it needs to go that speed. Something is blocking the flow of fuel.

May 13, 2014 | Suzuki GSX 400 F Motorcycles

2 Answers

My bike will idel but won t rev. just cuts off


Starving for fuel.
Make sure carbs are getting fuel.
Make sure fuel filters are clean,
make sure fuel pump is working.

If carbs are getting fuel but wont rev, you need to clean your carbs because your jets are clogged

Dec 03, 2010 | 2000 Suzuki GSX 750

1 Answer

My zxr400 will not rev and carbs are clean


Are you sure there clean? did you dissasemble yourself?
I had similar issue and i 1. removed carbs 2. drained float bowls 3. removed main jets
I soaked main jets in carb cleaner, then blew all passageways with carb spray, then sprayed carb spray through all passageways in the carbs, i checked all rubber diaphragms for cracks especially the float bowl ones, my main problem was old varnished , gel like fuel traces which had built up from bike being idle over winter.

Once i completed this i reassembled and the bike idled steady and also revved cleanly to 15k revs, you might also want to check your fuel filter as it can effect flow rates if clogged with old varnished fuel

Apr 05, 2010 | 1989 kawasaki ZXR 400

1 Answer

2 stroke scrambler revs high on its own


there should be an idle screw on the carb, set it when the choke has come off. You'll recognise it because it will have a spring underneath it.
Dan

Sep 05, 2009 | 2001 Suzuki GSX 400 Impulse

1 Answer

Surging


i think your issue is while at a steady cruising speed one of the carbs is not allowing steady fuel flow. so when you nail it, you cant hear or feel it. or maybe you can just a bit right when you hit it. one thing you can do short of taking the carbs off and cleaning them is, take the air filter apart and start the bike rev it up high and with a large clean rag shove it into the back of carbs and cut off ALL AIR FLOW.. at the same time, twist throttle wide open. doing this will flood out and kill the engine. but at the same time, it will sometimes clean any debris or grime out of the jets. try it a couple times.. hope this helps.

May 31, 2009 | 1993 Suzuki GSX-R 750 WP

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