Fuel set to on, bike dies.

[EODginger]

When the petcock is set to on it dies (as if you ran out of fuel) unless you set it to prime. Is there an easy diagnosis for this or do i have to take it into a dealer?

[yngveny]

My guess is vacuum leak. The petcock is vacuum operated in the on position. Check the hoses to the petcock.

[Neorex55]

how old is the bike?

if its still the original it may just be a bad petcock or something screwy inside it...

mine for example is still the original and will run pretty much in any position i leave it in but better in some and horrible in another but never really kills the bike like it ran out (i know i should replace it)

As yngveny said look for any vacuum leaks small or big they can really mess stuff up

[crazycraven420]

you should have a vacuum line off the petcock to the carbs...that's probably the culprit. If its there an in good shape the petcock could be gummed up.

[EODginger]

It's a 2006, but it only had 900 miles on it so it's been stagnant for some time. Not sure if that would be a factor.

[Tempted]

It's a 2006, but it only had 900 miles on it so it's been stagnant for some time. Not sure if that would be a factor.

Only if it set with fuel in the tank.

[jmoles95]

I think everyone has nailed it haha and good find

[crazycraven420]

It's a 2006, but it only had 900 miles on it so it's been stagnant for some time. Not sure if that would be a factor.

if it had fuel in it then it would be gunked up...

if it was empty it would prolly be rusty...

so either way clean that junk lol

[ZookRick]

Carbs are probably messy too with gas left in them, especially if the rust in the tank was sent through them. Mine had 1/4" of rusty particles in the bottom of the bowls.

[EODginger]

Yeah there's rust in the tank. Today I panned on cleaning up the tank with hydrolysis, replacing the fuel lines, filter, oil filter, cleaning the air filter, checkin the spark plugs and doing ALOT of research before I even take a screw off the carb to clean it.

Sidenote: This is an extraordinarily dumb question. The previous owner said she had a Carb Overhaul done to it. What in the hell does that mean?

[MEngineer]

Yeah there's rust in the tank. Today I panned on cleaning up the tank with hydrolysis, replacing the fuel lines, filter, oil filter, cleaning the air filter, checkin the spark plugs and doing ALOT of research before I even take a screw off the carb to clean it.

Sidenote: This is an extraordinarily dumb question. The previous owner said she had a Carb Overhaul done to it. What in the hell does that mean?

It means you need to go through every single piece of the carbs. You have no idea what the PO could have done. When you get in there you will be able to tell what needs to be replaced and what doesn't.

[EODginger]

I assume there are some carb threads on this forum, or videos on assembly?

[crazycraven420]

carb 101 or 102 in the wiki depending on if you have a pre or post kat (97 or older=pre, 98 or newer= post)

[jmoles95]

it is also in a sticky in the mechanics section