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On my kawasaki z400 1979 the the throttle twist grip side header pipe glows red on tickover checked carb for fuel blockage and air leaks none found but the fuel tap will only work in the pri position so is this my problem

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  • Master
  • 409 Answers

Check the vaccuum hose to the tap isn't leaking as this would cause these symptoms...

Posted on Oct 25, 2012

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Posted on Jan 02, 2017

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SOURCE: yzf 450f `04 exhaust pipe glows red --believe it to be lean burn

They will all glow red when you let them idle for a couple minutes. The timing is retarded at idle I believe. Once reved up they will cool off. I figure best to give them a little rev once and a while to help prevent this.

Posted on Mar 19, 2009

goofduck
  • 490 Answers

SOURCE: 1998/99 kx 125 fuel leaking from carb outlet at bottom

sounds like the needle and seat may be the problem

Posted on Apr 15, 2009

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SOURCE: Kawasaki EL250 carburettor

Turn off the gas and remove the float bowl. Remove the fuel line. Remove the float pin and float with needle valve. Do not bend the tang that the float needle sits on. Spray carb cleaner into the seat where the needle valve came from to clear out any trash in the valve casing. Spray the float bowl and interior of the carb. Remount the needle and float back in place and put the float bowl back on. Install an in-line fuel filter. The diagram below shows a 1994 carb Yours will be the same or close to it.

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Posted on Jul 03, 2009

ollie reece
  • 1167 Answers

SOURCE: Exhaust header pipes getting glowing red hot

the pilot jet is too only make the bike idle so it wouldnt be this is the engine have lots of oil in the engine

Posted on Oct 01, 2009

Testimonial: "I haven't thought of that but I will put a little more oil in it and try it again. Will let you know the results later. Thanks"

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SOURCE: 04 yz250f pipe at motor glowing red hot

Any reason you had to change the jetting??New pipe,Intakes.?But,even though you may have it a bit rich on idle the pipes WILL get very hot,very quickly without some sort of air flow over the front of the motor and radiator.At the very least,have a strong fan blowing directly on the front of the motor if you are going to let the bike run and you are not riding it.I have seen the white plastics in front of the radiator distort from the radiant heat.Don't idle them for in more then 20 seconds.It can do heaps of damage.Ride the bike and see if its running well.When you stop,turn it off.All the yz and wrf will get very hot at idle.Hope this helps

Posted on Jan 17, 2010

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1 Answer

My side by side is running at half throttle and the muffler gets blood red hot like its flooding


I'm not familiar with your vehicle, but if it was a road car I would guess at:
Oxygen sensor
Failed catalytic converter
Cylinder head problem.

There's either an air/fuel mixture problem finding its way into your muffler (and is burning inside it) or red-hot exhaust gases (because of a head problem) finding their way direct into the pipe.

I would doubt that there's too much fuel as such - an over supply of fuel tends to 'choke' and make an engine sluggish. A weak mixture - ie, too much air for the amount of fuel - causes overheating.

If you can, check for air leaks - air being drawn into the fuel system. This can cause overheating, though I can't say I've ever come across a muffler glowing red hot because of it.

Then again .. if it's running at half power, that does suggest an over -rich fuel/air mixture

Mar 25, 2016 | kawasaki 2013 Teryx4 750 4x4 EPS LE

1 Answer

Idle to high when its warm up at 2000 rpm , how can i lower idle and at what rpm should at be at


Check it's not a tight accelerator cable issue & that there's some play in it at the throttle grip. If there's none, it might just be a case of slackening off the cable at the adjuster where it goes into throttle grip on the bars.
Assuming that's okay but the engine still revs high on idle speed, you'll have to lower the tickover by removing the left middle fairing to expose the engine. If you trace the accelerator cable, you'll see were it sits between the carbs or throttle body if your bike is fuel injected.
There's a tickover screw which will have to be turned out anti-clockwise to lower the revs.
It's not really a hard job to do if you know a bit about engines but if you don't, give the job to somebody who does.

Jun 02, 2015 | 2002 Yamaha YZF-R1

1 Answer

When i start it it high revs


with choke it mite do , wen choke is off does it come down ? if not find the tickover screw on the side of carb and turn anti clockwise and should slow down , check you have free play on throttle twist grip as cable could be too tight , normally a couple of mil movement on grip ! check cable is not damaged or routed wrong ! P...

Nov 28, 2013 | Suzuki Motorcycles

1 Answer

I have a Kawasaki zephyr 750 after I cleaned carbs the header glows red after I start it and let it run for a few mins. I put hotter pugs in it last year when I had carb trouble could that be it? (All four...


A hotter plug could cause the piston crown to melt (depending on how much hotter) The reason engine makers give a recommended spark plug is because this grade will give the best performance and efficiency. Try reverting to the correct grade.But the headers glowing red is not unusual as not all header pipes are twin wall tubing.

May 17, 2013 | Motorcycles

1 Answer

On my 1979 kawasaki z400 the throttle side header pipe glows red if left to tickover can not find blockage in carb or air leak but the fuel tap will only work on the pri position is this my problem not...


No, it is more likely a bent exhaust valve or burned. The fuel flow position may indicate an additional issue with the carb, but the exhaust should not glow red like that- when it does it means there is unburned fuel and burning combustion gasses entering the pipe.

If the bike is hard to start, this can be why as well. Do a static compression test to see if the valves are leaking.

Oct 24, 2012 | 1979 kawasaki Z 650 SR

1 Answer

My 1988 Kawasaki KX80 is reving up loud and it wont cut off but the throttle is not stuck.


With the engine turned off, open and close the throttle let go of the twistgrip as the slide decends to the bottom of the carb, you should here a cosmetic clang as the slide hits the bottom of the carb, make sure you have lots of free play in the addjuster on the cable at the carb end,undo the idle screw all the way allowing the slide to travel further down now start the engine and check if the engine still races if the engine stops when you let loose the twist grip, slowly addjust the idle screw till the correct tickover is obtained, if this does not correct the problem, remove the slide from the carb noteing the cutaway in the bottom of the slide, this must face to the rear away from the engine, forward facing would cause the engine to race as the cutout is to let air in to the rear, when facing front it will let exsess fuel in

Aug 30, 2011 | kawasaki GV650 Aquila GV650 Cruiser...

1 Answer

1994 yz 250 stuck on high idle as if bike going to blow up, just got bike running fine, i changed air filter and altered original carb settings do know why tried to put stock plug in because it had b8es...


When you open and close the throttle can you hear the slide hitting the throttle stop?have you removed the slide, and fitted it in the reverse order, this would restrict full opperation of the slide leaving it in the part open position, the cut out side of the slide faces rearmost away from the engine, if you have exsess play in the cable at the carb, it is poss you may have fitted it wrong, unscrew the tickover screw almost all the way until you no longer hear the slide hitting it on throttle closure, start the bike you may have to hold the throttle at the desired revs, whilst doing this screw in the tickover screw until it just increases the tickover, you can now release the twist grip and addjust the idle to suite

Aug 12, 2011 | Yamaha Fuoco 500 Motorcycles

1 Answer

2007 yamaha yz450f... while riding last week it was backfiring on deceleration. it blew a 5 inch hole in the header pipe. i purchased a new one, cleaned the air filter, changed the oil and put a new spark...


Exhaust leaks near the exhaust port can draw air into pipe on deceleration and detonate any unburnt fuel leaving engine, causing backfire and high temps.
An overly lean fuel mixture on the engine can make decel backfire worse too.

Mar 13, 2011 | Yamaha YZ 450 F Motorcycles

1 Answer

What coud be making my pipe got red hot


Hi, the pipe getting red at the header is caused by the fuel mixture being to lean or the ignition timing being too retarded. Check the induction side of the engine for air leaks and the carburettor for blockages etc. Check the ignition timing.
Hope that helps Matt...

Nov 23, 2009 | 1986 Suzuki LS 650 Savage

1 Answer

Immediate overheating... with in 1 to 2 minutes of warm up... bad enough to make the header pipe glow red.


It sounds like the fuel mixture is running extremely lean for some reason. Disassemble the carb and clean out the jets. Inspect any rubber parts between the carb and the intake. Make sure the intake manifold doesn't have an air leak.

Oct 07, 2009 | 1998 Honda XR 400R

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