Question about 2001 Suzuki AN 400 Burgman

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Backfiring at high rev's

Hi all, My 9yr old 400cc suzuki Burgman backfires when I release the trottle slowing down from motorway speeds and when it's ticking over at traffic lights, when the engine is hot.  What do you think is causing this issue?

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Could be spark plug going bad could be leak in the exhaust, could be some water in the fuel.. could be fuel air mix not set properly, could be vales need adjusting.

Posted on May 31, 2009

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"could be spark plug going bad could be leak in the exhaust, could be some water in the fuel.. could be fuel air mix not set properly, could be vales need adjusting."

I agree with tbrat44 its what I would look at..

Posted on Mar 03, 2010

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1 Answer

My Suzuki Burgman 125 is sluggish and top speed max's at 50mph, wiring also when coming down a hill and releasing the throttle there is a whirring noise?


Hi, Bryan and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition and leaking check for spark leakage in the dark.
3. Spark plug gap too close or too wide.
4. Faulty ignition coil, module, and or sensor.
5. Battery nearly discharged.
6. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
7. Intermittent short circuit due to damaged wire insulation.
8. Intake air leak.
9. Water, dirt, or rust in the fuel system, fuel pump and/or filter.
10. Old dead or bad fuel.
11. Faulty fuel pressure regulator
12. Pinholes in the in tank plastic convoluted tubing from the pressure regulator to the quick disconnect check valve.
13. Fuel tank vent system plugged.
14. Throttle body controls misadjusted.
15. Damaged throttle body or intake seals.
16. Loose, dirty, or corroded ignition module connector at crankcase.
17. Faulty MAP, CKP, O2, and/or CMP sensors.
18. Incorrect valve timing.
19. Weak or broken valve springs.
20. Damaged intake or exhaust valve'
21. Control module may be in "LIMP" mode
22. Check for engine trouble codes.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
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Suzuki Burgman UH125 K7 Accleration and Topspeed
Suzuki Burgman UH125 Service Manual
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http://mybikemanuals.com/suzuki

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1 Answer

Burgman 400 2008. At light throttle openings say 1500 rpm. the revs rise and fall by 500 rpm continuously. This fault occurred after replacing the throttle sensor. Jill


Hi, Jill sounds like your new sensor (TPS) is slightly out of adjustment for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Suzuki, despair not, for a mere zero $ you can download another one. 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.
http://burgmanusa.com/forums/14-burgman-400-pre-2007/26989-surging-slow-speed.html
http://burgmanusa.com/forums/15-burgman-650/38185-tps-adjustment.html
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Ok so my Suzuki Marauder 800 backfires all the time now. It also will feel like it loose power then all of a sudden takes off.


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Hi! Just got a burgman 400cc scooter. need an Owners Manual. How best? Mal


i know how to manuever this machine or fix this,just ask again what kind of problem u have...

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1 Answer

My 86 suzuki intruder 700 backfires out the exhaust at idle. and makes a tapping noise. i already did a valve adjustment an new plugs


It could be the speed of one carburetor is faster than the other. This causes the backfiring as well as forces one cylinder to run lean which causes the tapping noise. You will experience an identical tapping or "ping" when you get close to empty on main fuel and need to switch to reserve. Most likely you or the previous owner unknowingly adjusted the speed of the rear carburetor down because of the high stock idle not realizing the front carburetor needs to be slowed down to match. While running simply turn the idle adjust screw clockwise on the rear carburetor until the idle smooths out and the backfiring/tapping stops.

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2003 Suzuki UH 125 Burgman will not move forward


Hi, Southsidemis for more information about your question 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.
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http://mybikemanuals.com/suzuki
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2 Answers

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Check valve clearance, as vlaves wear the gap closes, most riders don't bother to adjust them till they have a problem like this.... By the way the valve may be part of the issue for backfiring while deccerating but Pipes cause this.

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2 Answers

1996 Suzuki Savage 650 backfires on cutoff


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2 Answers

Speedo failure on my Burgman 400 (2000)


I had the same problem, the speedo is magnetic and it is inside the front wheel bearing, usualy when dirt goes in it brakes it so
I had to replace the magneto ring and it worked perfect. I went to a private suzuki parts provider and he ordered it for me for £15.00
replaced it myself, just take the wheel out and remove the old ring, clean, then put the new one.

but it could be that your speedo cable is bad, or dashboard is bad

May 16, 2009 | 2001 Suzuki AN 400 Burgman

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