MENU LOGIN 
   Redirecting... ...to our OLD website!


We're still in the process of converting the site to the new format.

Apologies for the inconvenience and thank you for your understanding.

-Matt, Admin

5

Ok - go now to OLD site

No thanks - stay on NEW site


Technical Motorbike Help

Honda XR 125 - High Revs result in SPUTTERING

Honda XR 125 - High Revs result in SPUTTERING - Forums [Biker Match] Honda XR 125 - High Revs result in SPUTTERING - Forums [Biker Match]
Home / Search Forums / Technical Motorbike Help /

Honda XR 125 - High Revs result in SPUTTERING

 Posts: 14       Pages: 1/1

Post Reply
Okay well I've tried Redex to see if that'd help and it didn't also filled the tank up so it defo has petrol in :P

My problem is in EVERY gear when I hit high revs just below where I need to change gear where all the decent power from my bike comes from, it just sputters and sputters and sputters and won't do nothing just feels like its out of petrol but its obviously not so I have to go up a gear for it to do anything or drop my revs.

No Black smoke not that I've noticed of.
Doesn't really smoke either when its doing it.

   Update Reply
Paul @ 17/01/2010 20:59  

try draining the float bowl on your carbs sounds like you got some water or silt in them this will lift when the revs are high causing them to temp block the jets that is of corse if its carb not injected

   Update Reply
WheelyNealy @ 17/01/2010 21:29  

Not injected cards, I will try this as soon as possible thanks anymore advice is much appreciated.

   Update Reply
Paul @ 17/01/2010 22:35  

May be good idea to fit new spark plugs as well Paul 'cos I had a similar problem and thats what the cause was.

   Update Reply
Deleted Member @ 17/01/2010 23:00  

Going to clean out my carb tomorrow will update with the status.

   Update Reply
Paul @ 18/01/2010 13:00  

I had a flake of crap in an amal carb on my commando once. it was a single corb setup with a 2 into 1 manifold. tick over and low range revs fine but as soon as i opened it up flake covered main jet and cut fuel off. soon as revs dropped it picked up again.

   Update Reply
bluesbiker @ 18/01/2010 13:38  

just curious... does such a problem not affect injected bikes? And if so, why not? I'm not 100% sure how fuel injection works but I'm curious now

   Update Reply
Matt @ 18/01/2010 16:34  

Has it just started doing it, is there a restrictor in it. If it does it at the same revs. in each gear and you can not ease it past by rolling of the thorttle a bit then it has to be an electrical fault, start with the spark plug.

   Update Reply
Bikeabill @ 18/01/2010 16:37  

Intectors dont have float bowls Matt, but you can still get petrol problems that cause misfires

   Update Reply
Bikeabill @ 18/01/2010 16:42  

Paul before you spend money ata garage, check the spark plugs, the spark plug colour and or any residue present can indicate what’s wrong with your engine. Search the internet for a colour chart but it can tell you if its running too rich, lean, oil burning etc Link to spark plug chart http://www.ngksparkplugs.com/tech_support/spark_plugs/f...p?mode=nml ...... usually spluttering engine will be lack of fuel or restricted air if it is only happening at high revs ....Remember a dirty air filter will reduce the air, making the mixture to rich. hope this helps..

   Update Reply
Deleted Member @ 18/01/2010 17:21  

fuel injection is under presure all the time matt then a solaniod opens at the right time to let the fuel in to the manifold they can get bloked mostly hapens in multi jet injetion systems like in your car ect usualy shows as a puff of white smoke with diesel engines but with the weather being cold it most likely that the water in the air has condenced in water droplets and run down the tank into the fuel line this as blues said sits in the bottom of the bowls and get sucked up at righ revs simple to clear no garages needed just find the drain on the bottom of the carb normaly with a rubber pipe leading from it useing a pozi driver undo screw a few turns let it run fuel onto the ground for a few seconds then tighten up (out side in open air not in house or garage) then go try if it stil dose it then fuel line may be blocked but i would then start looking at spark plugs too as you going to be taking bike apart then

   Update Reply
WheelyNealy @ 18/01/2010 20:00  

we have that on planes, always have to drain the tanks (wings) and carbs every morning before the first flight. Then check the condition of the fuel to see if there's water in it

   Update Reply
Matt @ 18/01/2010 21:21  

ooh we gonna get a biker match airways next then ??? lol

   Update Reply
WheelyNealy @ 19/01/2010 13:54  

I love it when pilots try to talk technical. Usaul pre-flight checks are "make sure you siiting the right way round" and " move all the switches untill the bloke outside stops waving and shouting" oh and "don't forget your rayban aviators".

   Update Reply
bluesbiker @ 19/01/2010 15:28  

 Posts: 14       Pages: 1/1

Back to top
Facebook Twitter Google Pinterest Text Email