GAS Motorcycles - Page 9 - Recent Questions, Troubleshooting & Support

sounds like a sticky float in the carb..

Floats are set to high in the carbs or your needle and seats in the carbs have dirt stuck in them and not closing.

if it doesit in cool part of day its not vlock. Inspect igntion components for age. Sounds like a part is gittn hot then coolin down. Seek a clymer shopmanual

Hi Felix seems like the float needles in the carberator's are gone and allowing fuel straight into the engine. Remove carbs and check them a clean up might do. If not replace the needle and seat. Regards Jim...

Timothy: Try this video on how to take apart the fuel pump: https://www.youtube.com/watch?v=h-TVShZKq6g

Hi David check the fuel supply from the tank. Turn off the tap then pull the pipe off the tap or carb then turn fuel on there should be a good steady flow if not there is a blockage. There is a filter in the tank you will need to remove the tank and then the fuel tap. Also check along the fuel line for blockage. And make sure the vent in the filler cap is ok. Regards Jim...

Inadequate spark, improper metering (carburetor), or stuck injector (fuel injection).

1 = Check between carb and head for vacuum leaks 2 = Float height could be set to low 3 = Needle height low Give the carb a good clean with carb cleaner making sure all passages and jets are clear. Reset float height and make sure all flanges seal properly.

getting to much gas,adjust carb

Hi. Vern the float needles in the carbs need to be cleaned. Also take the plugs out and turn motor to drive out all the fluid. It will also need an oil change because the fuel will get past the rings and fill the sump. Good Luck.

Assuming that the fuel spigots are open, check for crud in the tank which is clogging the fuel line by blowing some compressed air backwards through the spigots, and change the fuel filter.

Hi Michael: Interesting. You're right on with the necessities of a running engine...... spark..... and gas. Sputtering like it was out of gas...... Had you just fuelled up? Possible contaminated fuel? Drain the carb into a glass jar and check the fuel. No spark but coils are good..... How do you know the coils are good? Try pulling the plugs to see if they are fouled. Check to see if you have spark at the plugs. It's too rainy to ride on vancouver Island today, at least for an old dude like me.

No. The electrical and fuel system are completely separate. Are you sure that the broken wire is electrical? Is it possible it is a fuel line or breather line that has split. Be careful as fuel (especially misted fuel) is highly flammable and can ignite with disastrous results.

if it has a kill switch then check it for a circuit.

YOUR WHOLE FUEL SYSTEM NEEDS A COMPLETE CLEANING .CARBS OR INJECTED TAKE WHOLE SYSTEM APART AND SOAK ....ANY TIME STORING A GASOLINE POWERED ANYTHING ,ALWAYS RUN IT OUT OF GAS..GAS GUMS UP ALL THE GAS SYSTEM JUST AFTER A COUPLE OF MONTHS OF SITTING..IF ITS SMELLS LIKE TURPENTINE ..ITS A CLEANING YOU WILL BE A DOING..GREEN SLIMY GUNK..IVE CLEANED A MANY CARBS AND TANKS LIKE THIS..DONT TRY ANY QUICK IN THE TANK FIXES..THESE USUALLY CAUSES MORE HARM THAN GOOD..AND GOOD MONEY DOWN THE DRAIN..BRAKE CLEAN ,OR CARB CLEANER WORKS GREAT ...

Hi Paul: I'd be suspicious of a fuel restriction. May I suggest flushing the carb (there should be a drain screw on the bottom) and see if you can find a fuel filter that needs cleaning or replacing. It may be that a high speed jet in the carb is obstructed. if flushing it did not help, try removing it and use compressed air to gently blow through the orifices (fancy word for holes). Hope this helps.

Check the float valves for crud and damage

first off are your plugs gapped correctly? Also how long has it been since the valve lash has been set? Is this a battery powered ignition system or a CDI style? If it's battery then a good battery source is needed, also check every ground and every single switch between the hot side of battery to ignition coil, include your start button and also the engine kill switch(which should be open)

fuel filter,air filter

its at the bottom of the tank one side or the other.