At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
One carb does not want to fuel on low revs ie remove plug lead from good pot on low revs it stops remove plug lead on good pot with revs it wiil run remove bad plug lead on low revs makes no change to engine at all as good pot does all work
Re: One carb does not want to fuel on low revs ie remove...
Sounds like you need to remove the carbs and dismantle them and clean all the parts real good.
Remember if you separate the carbs from each other you will need to resync the carbs.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Can be a few things , carburetor, h.t lead ,try a new spark plug , not old fuel , ps when it starts and all over the place it's normally fuel starvation ie carbretter or plugs . Thirst thing I would do is a compression test , if all good , new plug carb , fuel then h.t.lead with coil good luck colin
Was the bike working okay after the overhaul? Mis firing due to bad setup or very bad fuel.If it has not run right since the work was carried out ask the repairer to take a look.
If it only started to go awry after using wheap fuel, (it should still be of uniform quality with other fuel,)
I would drain the tank and refill with premium. Try not to get any air into the system if you do this, makes life easier
You mean the revs come up even if the throttle is left in idle?
If yes: it means your idle runs too lean AND the carbs aren't balanced ( one gives more air than another )
Unscrew all the idle mix screws 1/2 turn
To balance, remove 1 spark plug lead, check the rev falling.
Replace the lead and remove another one. Check the rev fall etc...
Regulate the carb opening so that all the cilinder disconnects give the same rev-drop.
If carburetted it sounds like either a low fuel level in the carb ie float setting incorrect or plugged fuel filter or kinked line or miadjusted or worn accelerator pump.
Hi
White smoke is usually a good sign of un-burnt diesel so reading your post and all the things you have already changed ie the glow plugs I would have the injectors tested to make sure they are atomising properly as it sounds to me like when your car isn't under load ie at low revs you have a cylinder that isn't firing correctly
Hope this helps Nick
The carb is flooding because of a stuck needle valve in the float chamber. When the bike is running at higher revs, it is probably drawing enough fuel into the engine to run OK, but at low revs, the overflowing petrol will be getting into the engine in far too higher volume and flooding the cylinder, drowning the spark plug.
You will need to remove the float chamber from the carb, take out the pivot pin that the float hinges on in order to release the needle valve and clean it out. 99% of the time simply dropping the needle valve out, giving it a wipe with a lint free cloth and flushing a little clean petol through the inlet pipe to dislodge any obstruction will fix the problem. While the float chamber is off, check that there is no dirt in the bottom and that the entire chamber is clean and free of any muck.
There will probably be a drain valve on the side of the carb (Usually a brass screw set into the base of the carb float chamber at a slight angle). Before you go to the trouble of removing the carb from the bike, try this:
Turn off the fuel supply. Put a cup under the carb to catch fuel. Remove the drain plug and allow the fuel in the float chamber to run out. Now the float is sitting at its lowest possible position inside the float chamber, turn the fuel supply back on and as petrol runs out of the drain hole, tap the carb sharply and repeadedly with the end of a screwdriver as you let about a pint of petrol flush through. Turn off the fuel supply and replace the drain plug.
The flushing and tapping MAY dislodge the obstruction that is holding the needle valve open and fix the problem without having to remove the carb
check the oil reservoir, the light may be out, but when the injector oil is low, it won't start. Make sure reservoir is full. Also check the run switch. It'll turn over but not start if that is off.
first do a compreshion test on the engine it may be one of the pots is low on compreshion,, ie: a velve has burnt out or is leaking badly or it may be that the carbereters need to be striped down and the slow running jets need to be cleaned out,, if its a slow running jet blocked it wont run at low revs on that pot
Your fuel low fuel high adj on carb arent set right. one is for idle and low running while other is for high rev. Getting these set just right is very tricky and takes some time doing it to become good,Im starting you off on a crash course,Im not gauranteeing anything but here it goes. LOcate the two fuel adj. screws on carb,if they have plastic caps on top remove them with needle nose pliers so the screws themselves are exposed. Next,I want you to take a screw driver and turn both in all the way till they stop. Now take and turn each one out counter clockwise three full revolutions. Now start it to see if theres any improvement. (Note: further adj. may be required you may have to consult an expert to have it be done for you if you cant get it).
×