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Re: fuel leaks out what looks like a vent tube coming...
Hi ...... Sounds like float levels are set too high or debris in float chamber. Switch petrol off from/at tank and drain fuel from float bowls, if you use the cap off a paint can etc you can catch it and look at it to see if any water or debris present. Retighten drain screws, switch petrol back on and see if it still overflows.
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First you can look see if any fuel lines have become perrished or simply fallen off, lift up the tank and start up the bike the fuel tap is located at the rear of the tank and can be turned to off position. Try locate where the fuel is leaking, if it is coming fro. The carb breather tubes, or the overflow at the bottom of the carb float bowls if you are not up to scratch with the job you may want to employ someone to remove the carbs for you for cleaning-servicing
from memory a fuel line( runs to a fitting on carbs which feeds all carbs with a common tube) a vacumn line to opperate the fuel tap(slightly larger diameter comes off the manifold) a tank breather line
hi,it sounds like you have a stuck float valve,give the carb bowl a good healthy tap with the handle of a screwdriver,it may loosen it up and problem solved,however if it doesnt then you will have to remove the carb and free the float bowl up,.floats sticking can be caused by fuel left in the bowls over a long period(winter),when the fuel evaporates it leaves behind a white gummy looking compound that can create all sorts of havoc in a carb...cheers
that would be either the float set to high or the needle and seat is missing an o-ring while you had it apart. Should look at getting a carb kit there only approx. 23 bucks and it would save you a lot of grief in the long run.
it's probably leaking from the carb and down the cylinder into the crankcase. it is probably due to a stuck float in the carb. take the float bowl off and make sure it is clean. the float can also be full of gas not letting it float up and stop the gas flow. the carb will fill up and leak wherever it can which is likely the case
Remove the fuel line from the carb. Turn the gas on > got flow? If not then clean the fuel line and petcock filter if it has one. Install an in-line fuel filter or replace the present one. Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Use compressed air to assist in cleaning. Is the float needle stuck closed? Be certain the vent tube and vent port are clear.
hi 81 yamaha i am concerned about the fuel smell coming out with the oil. could be the carbs flooding filling your crankcase with fuel? if not it sounds like you have blow by which would cause your crank case to be slightly pressured. this is caused by worn piston rings. do not plug your crank vent. if you leave your vent open install small filter to stop dirt from entering jim
Wait... fuel is pouring out of the crankcase breather? Are you sure it's not the carb overflow tube? The crankcase breather should be going back into your airbox or through some kind of filter.
If gas is coming out of there DO NOT START YOUR BIKE. It means that gas has gone from the tank through the carbs into the cylinder and is now in your oil. Thinned out oil is the devil for bikes.
Sounds like you'll need to clean the carbs and set the float bowl height and maybe rebuild the petcock. Check to see if any fuel is coming out when the petcock is turned off. If it only has on pri and reserve then check for gas in the vaccum tube.,,