2001 vs800 has trouble starting/idling and when it does turns off when throttle is applied

[judahls]

I would verify that I am getting fuel to the pump, then test the pump. I have seen the petcocks get plugged.

ive tested the pump by unplugging the outlet hose and pressing the ignition. it does work but only when the ignition is pressed

i got it to run and i checked unplugged the fuel outlet again and if the bike is running the pump is pumping

So it's running properly now or are you back to square one where it's idling but not revving?

back to square one, unfortunately. but why would the pump only run when the bike is ON

That's how it works. Safety feature - so if you crash and the fuel line ruptures the pump doesn't keep pumping fuel onto a hot engine....

so at this point ive confirmed that the pump works, we have spark, and both carbs are getting fuel

[hillsy v2]

I would verify that I am getting fuel to the pump, then test the pump. I have seen the petcocks get plugged.

ive tested the pump by unplugging the outlet hose and pressing the ignition. it does work but only when the ignition is pressed

i got it to run and i checked unplugged the fuel outlet again and if the bike is running the pump is pumping

So it's running properly now or are you back to square one where it's idling but not revving?

back to square one, unfortunately. but why would the pump only run when the bike is ON

That's how it works. Safety feature - so if you crash and the fuel line ruptures the pump doesn't keep pumping fuel onto a hot engine....

so at this point ive confirmed that the pump works, we have spark, and both carbs are getting fuel

So it looks like the carbs need a thorough cleaning.

[judahls]

I would verify that I am getting fuel to the pump, then test the pump. I have seen the petcocks get plugged.

ive tested the pump by unplugging the outlet hose and pressing the ignition. it does work but only when the ignition is pressed

i got it to run and i checked unplugged the fuel outlet again and if the bike is running the pump is pumping

So it's running properly now or are you back to square one where it's idling but not revving?

back to square one, unfortunately. but why would the pump only run when the bike is ON

That's how it works. Safety feature - so if you crash and the fuel line ruptures the pump doesn't keep pumping fuel onto a hot engine....

so at this point ive confirmed that the pump works, we have spark, and both carbs are getting fuel

So it looks like the carbs need a thorough cleaning.

i cleaned them with throttle body cleaner and sprayed it into the holes till it came out the other side. perhaps i should have a specialist do it

[sgtcall]

ncdave

NCDave found someone he could mail the carbs to and get them cleaned and rebuilt. See this thread. viewtopic.php?f=47&t=14023&start=120

[hillsy v2]

i cleaned them with throttle body cleaner and sprayed it into the holes till it came out the other side. perhaps i should have a specialist do it

You need to blow the cleaner out of the passages with compressed air at the very least. It can be quite difficult to get them clear - especially if the bike has been sitting for a long time. You also need to make sure all the jets and the mixture screws are out so you can get the passages clear.

It's not rocket science - but it is a bit finnicky and you need to be thorough.

[sgtcall]

Where are you located, city or state? Someone may be a to recommend a place near you to look at the carbs.

[judahls]

ncdave

NCDave found someone he could mail the carbs to and get them cleaned and rebuilt. See this thread. viewtopic.php?f=47&t=14023&start=120

thanks bud, ill look into it

[judahls]

Where are you located, city or state? Someone may be a to recommend a place near you to look at the carbs.

agusta GA, there are 2 places thad do it for a price. i work at one of the ford dealers there so i was thinking id ask one of them to give it a deep clean for me. more of a fuel induction guy myself so i dont know much about these things

[hillsy v2]

Where are you located, city or state? Someone may be a to recommend a place near you to look at the carbs.

agusta GA, there are 2 places thad do it for a price. i work at one of the ford dealers there so i was thinking id ask one of them to give it a deep clean for me. more of a fuel induction guy myself so i dont know much about these things

If they have an ultrasonic you should strip the carbs down and give the bodies a bath. Good thing about ultrasonic is you can't really overclean / damage anything.....as long as you have the slides and jets all out.

[judahls]

Where are you located, city or state? Someone may be a to recommend a place near you to look at the carbs.

agusta GA, there are 2 places thad do it for a price. i work at one of the ford dealers there so i was thinking id ask one of them to give it a deep clean for me. more of a fuel induction guy myself so i dont know much about these things

If they have an ultrasonic you should strip the carbs down and give the bodies a bath. Good thing about ultrasonic is you can't really overclean / damage anything.....as long as you have the slides and jets all out.

yeah i can ask, but it might be a bit since i am out of work due to a hit and run on a different bike (my beloved gz250)

[hillsy v2]

yeah i can ask, but it might be a bit since i am out of work due to a hit and run on a different bike (my beloved gz250)

Do you have a compressor at home? If so have a go at them yourself with carb cleaner and compressed air. You may as well take your time and have a few goes at them while they are out of the bike.

[judahls]

yeah i can ask, but it might be a bit since i am out of work due to a hit and run on a different bike (my beloved gz250)

Do you have a compressor at home? If so have a go at them yourself with carb cleaner and compressed air. You may as well take your time and have a few goes at them while they are out of the bike.

yeah, i could totally look into that. but i cant drive, i have compressed air but not carb cleaner, would brake parts cleaner work?

[Herb]

I would verify that I am getting fuel to the pump, then test the pump. I have seen the petcocks get plugged.

ive tested the pump by unplugging the outlet hose and pressing the ignition. it does work but only when the ignition is pressed

i got it to run and i checked unplugged the fuel outlet again and if the bike is running the pump is pumping

So it's running properly now or are you back to square one where it's idling but not revving?

back to square one, unfortunately. but why would the pump only run when the bike is ON

That's how it works. Safety feature - so if you crash and the fuel line ruptures the pump doesn't keep pumping fuel onto a hot engine....

so at this point ive confirmed that the pump works, we have spark, and both carbs are getting fuel

So it looks like the carbs need a thorough cleaning.

i cleaned them with throttle body cleaner and sprayed it into the holes till it came out the other side. perhaps i should have a specialist do it

Did you remove all the parts with diaphrams and orings first. Carb cleaner can damage them and cause even more problems including causing the orings to deteriorate and pieces can lodge in small passages.
One other place to check is the slide diaphrams. If the carb cleaner and age has created holes or tears the slides won't move to allow the engine to accelerate.

[judahls]

I would verify that I am getting fuel to the pump, then test the pump. I have seen the petcocks get plugged.

ive tested the pump by unplugging the outlet hose and pressing the ignition. it does work but only when the ignition is pressed

i got it to run and i checked unplugged the fuel outlet again and if the bike is running the pump is pumping

So it's running properly now or are you back to square one where it's idling but not revving?

back to square one, unfortunately. but why would the pump only run when the bike is ON

That's how it works. Safety feature - so if you crash and the fuel line ruptures the pump doesn't keep pumping fuel onto a hot engine....

so at this point ive confirmed that the pump works, we have spark, and both carbs are getting fuel

So it looks like the carbs need a thorough cleaning.

i cleaned them with throttle body cleaner and sprayed it into the holes till it came out the other side. perhaps i should have a specialist do it

Did you remove all the parts with diaphrams and orings first. Carb cleaner can damage them and cause even more problems including causing the orings to deteriorate and pieces can lodge in small passages.
One other place to check is the slide diaphrams. If the carb cleaner and age has created holes or tears the slides won't move to allow the engine to accelerate.

did i remove the what? with the what? a what? i repeat, im a fuel induction guy, i know almost nothing about these things. the 250 is a single carb so thats easy enough but since its my daily ride i dont really have to service the carb. this is why i want to give it to a shop or a coworker who knows how to service these things

[hillsy v2]

Did you remove all the parts with diaphrams and orings first. Carb cleaner can damage them and cause even more problems including causing the orings to deteriorate and pieces can lodge in small passages.
One other place to check is the slide diaphrams. If the carb cleaner and age has created holes or tears the slides won't move to allow the engine to accelerate.

did i remove the what? with the what? a what? i repeat, im a fuel induction guy, i know almost nothing about these things. the 250 is a single carb so thats easy enough but since its my daily ride i dont really have to service the carb. this is why i want to give it to a shop or a coworker who knows how to service these things

Basically you need to take out all the carb parts until you are left with the carb body and then clean the passageways. Brake cleaner will work but it doesn't have the same solvents as carbon cleaner (IE: carb cleaner is better).

You can clean the other carb parts with brake cleaner but blow them dry with compressed air - don't let them soak.

[judahls]

Did you remove all the parts with diaphrams and orings first. Carb cleaner can damage them and cause even more problems including causing the orings to deteriorate and pieces can lodge in small passages.
One other place to check is the slide diaphrams. If the carb cleaner and age has created holes or tears the slides won't move to allow the engine to accelerate.

did i remove the what? with the what? a what? i repeat, im a fuel induction guy, i know almost nothing about these things. the 250 is a single carb so thats easy enough but since its my daily ride i dont really have to service the carb. this is why i want to give it to a shop or a coworker who knows how to service these things

Basically you need to take out all the carb parts until you are left with the carb body and then clean the passageways. Brake cleaner will work but it doesn't have the same solvents as carbon cleaner (IE: carb cleaner is better).

You can clean the other carb parts with brake cleaner but blow them dry with compressed air - don't let them soak.

ill give that a shot tomorrow (its 2am)

[sgtcall]

I just happened to find this old thread on VS800 Carb Sync that you may need soon. http://intruders-alert.com/viewtopic.php?f=32&t=4139

[judahls]

Did you remove all the parts with diaphrams and orings first. Carb cleaner can damage them and cause even more problems including causing the orings to deteriorate and pieces can lodge in small passages.
One other place to check is the slide diaphrams. If the carb cleaner and age has created holes or tears the slides won't move to allow the engine to accelerate.

did i remove the what? with the what? a what? i repeat, im a fuel induction guy, i know almost nothing about these things. the 250 is a single carb so thats easy enough but since its my daily ride i dont really have to service the carb. this is why i want to give it to a shop or a coworker who knows how to service these things

Basically you need to take out all the carb parts until you are left with the carb body and then clean the passageways. Brake cleaner will work but it doesn't have the same solvents as carbon cleaner (IE: carb cleaner is better).

You can clean the other carb parts with brake cleaner but blow them dry with compressed air - don't let them soak.

ill give that a shot tomorrow (its 2am)

yeah, i think i mma give this to someone who know what they are doing

[sgtcall]

Hagar moto has some good videos on the carbs for a 1400, someone correct me if I am wrong but they are about the same process on the 800. Check out his you-tube page. https://www.youtube.com/@HagarMoto/videos

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