Yamaha Star 650 Fuel System Testing and Troubleshooting - From The Fuel Tank to the Carbs
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- Опубліковано 6 жов 2024
- In todays video we will be going through the complete fuel system from beginning to end to identify problems from within the system that might be causing issues with the bike. This demonstration is conducted with the tank removed for ease of viewing and conducting the demo.
In the first half of this exercise the assumption is that the delivery is hindered or corrupted by foreign matter requiring testing of flow from the tank and requiring possible parts replacement at the fuel valve and onward towards the furl filter as well. As a follow on to this, if flow could be achieved an instruction of purging the system of old gas is demonstrated so that all of the old gas is not re-introduced into the carbs.
The second half of this video deals with the normal sounds one hears when the key is heard and run switch actuated, this, which can point towards a possible fuse issue if an expected sound is not heard leads us to check all of the fuses in the fuse box. If its determined that all of those fuses are good, a further check of all electronics can be made by running gas right to the carbs and starting the bike that way, a good test to rule out the switches, relays and ignitor.
This doesn't fully rule out the pump or electric to the pump though, because if all of that worked, we should see the 12vdc at the pump connections on startup, so we gain access to the pump connector to check both the resistance of the pump as well as the expected voltage. If the resistance of the pump is infinite or short, well, its gonna have to be replaced. If there is no battery voltage when power is applied, then there is an electrical issue to trace.
If its determined to be the pump, we demonstrate the removal of the pump from the bike as a unit replacement for resolution of the problem.
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I found this video super informative. Right what you need to hear without making you waste your time. Thank you!
Glad it was helpful!
Its not what you are saying that makes this a 10 out of 10 video. Its how you say it. Very well done.
Thanks.
Great video. thanks for taking the time to teach!
Glad I could help.
@@retrotechandelectronics when i turn my 650 v star on. The pump wont prime. I disconnect the fule line to carb, and the pump primes... If i block with my finger it wont prime. Is my pump bad? It seems to not have the strength to push gas into the carbs. I also did what u showed, gas line into the carbs and my bike ran.
@@inutiasha If the bowls are filled with gas and the floats are up, where do you expect the pumps to push gas into? Maybe the carbs are already full?
Just helped me out! Was broke down but found my problem
Thank you so much for this video....I was about to go out and buy a fuel pump,I did the test with the multimeter and the service manual....it wind up being the fuel pump relay
Glad it helped
@@retrotechandelectronics I think I may have a fuel pump relay issue. All fuses test good. I checked the fuel pump resistance and it was 2.2 so that was good but when I checked for voltage on the pins of that connector I get no voltage at all when I turn on the key switch and the kill switch. I'm now trying to locate the relay but I'm unsure of it's location. Is it down behind the starter relay?
Thanks
Where is the fuel pump relay located ?
You just saved me a lot of time and work on my build! Thank you!
Glad to help!
very appreciative of these videos... about to purchase this very bike and theyve been super helpful
Glad you like them! Maintenance is key!
Can u make a video specifically on replacing the fuel filter
Why? Its specifically shown at just over 2 minutes into the video.
great video, it was really useful, thanks
You are the best! Great videos!
Glad you like them!
Thanks for the video - I feel like I can try this now!
good luck.
I have a question relating to a gas leak, and I don’t think you ended up covering my issue. Is there any way we can get in connection and discuss what it might be?
Detailed video, thank you
You’re welcome
I didnt get a voltage on the leads.. whats next?. Do i check for voltage at the relay? (I already checked thats all fuses have continuity)
great troubleshooting
Thank you.
Very helpful videos. When I try to start my 2002 VStar, the engine turns only once, then it stops and the starter relay buzzes and vibrates as if it’s clicking really fast inside. Battery is at 12.7v, fuses are good. Does that sound like a bad relay?
Figured it out. The battery held a charge of 12.7v but it failed a load test. Replaced the battery and all is good.
Was going to say sounded like a load issue
Awesome Video, Thank you
You are welcome!
Great video perfect explanation Thanks a lot I appreciate it
Glad you liked it
I would like to know why my 659 yamaha v-star will dial but when I go to take it boggs down new carbs . I thought it was the full pump tested and works.one more question are the keys in the carbs supposed to move you're going to regular pisses your own up and down in the carburetor I'm
It was very helpfull, thank You.
You're welcome!
My 2002 650 cut out on my way to work. I replaced the plugs, the gas filter, (which was filled with black corrosion). It still sputters and wants to quit if I give it more throttle. It only has 4500 miles on it and had the Carb rebuilt a few months ago. I felt something give as I was going 70 mph and I can`t help but think the gas tank is rusted inside and clogged my Carb. I put a temp glass filter to watch my gas flow and sure enough, more black flakes came into the filter. Now I think I need a new tank and Carb to get it right.
If the filters held up, the carbs should be fine. Clean out the tanks and determine that that stuff is, if it is part of the tanks, have the tanks lined or replaced.
@@retrotechandelectronics My gas tank was filled with rust and black crap. My Petcock was covered inside and clogged with it. I used Murlatic Acid and got most of it out. Ordered a new Petcock and cleaning my carb. The guy who sold it to me stored it in his garage. I can`t help but think he used Seafoam in it and stored it poorly.
Super video and presented about the best that I've seen - made the process easy to replicate and get the bike running again. One question - is there some sort of filter just on the inside of the carb opposite of where the fuel line connects? The bike runs at idle with a funnel and hose direct to the carbs but bogs down when giving it gas. Then when I hooked the funnel up to the fuel pump it pumped gas through to the end of the hose at the carbs. But when hooked to the carbs, the fuel doesn't flow from the funnel - making me believe that the entry to the carbs is blocked or maybe---the float needles are stuck? Any ideas?
I have other carb videos that break down the carbs to the component levels where you can see the individual screens behind the float needles.
Thanks you so much trying to make my v star 650 run again I'm going to try this tomorrow😁😁
We got it started buy puting gas in the air filter but it doesn't idle
I cleaned the carburetor so???????🤔🤔
WHAT??? That's not a thing! You don't put gas in an air filter, Take it to a mechanic.
@@retrotechandelectronics sorry 😭😭😭
I wish I found this earlier.. any words of advice from the guy who drained it from the fuel filter, added and started it up? It started up, but the carbs are def dirty from the bike sitting.
I have a whole series on the removal, teardown , cleaning and rebuild of those carbs
This may be a dumb question 🙋 does the fuel pump supposed stay running all the time? Thanks for video
No it doesnt
Bravo!
My bike doesn't make the pump noise when you turn the key but it runs...does it mean the pump is still bad?
Good video I have v star 650 it jerks at high speed 79/80 miles and it doesn't run it jerks more
That's at the top end of the gearing for it ... Mine darts from side to side
Nice video thank you so much
I hope u found it helpful.
When switch cut off engine position on, fuel pump not work, not noice on.... What the problem sir?
Fuel pump broken or system electric short?
Strange, tested voltage at plug for fuel pump 12 when turned on then drops to 8 then takes a long long long time to reach zero
Great vid! Thx. Question, what makes the ticking noise when you turn the bike to the on position?
The ticking noise is a correct response for a few seconds when turned in the on position unless the bowls are completely filled.
@@retrotechandelectronics thx! Yes I realise it's good, but what is the noise? I assume it's a relay possibly? Just curious
Any suggestions why fuel pumps out the top of the carbies when you turn the ignition on? Won't start. Take the top cover off and it just spurts out from each carby.
your floats are stuck or their needles arent good anymore.
Can you make a video detailing how to install a tachometer on the vstar please? :)
Both of mine have one, the next time I come across one ill document it.
Hi I have a 2002 v star and not only does it not click ( fuel pump) but the front cylinder goes out. Have you heard of anything like that
Question could a semi clogged filter and smaller lines create a lean read on the spark plugs ... Or is that just the wrong heat range? I've got a weaker rear cylinder sent the scope in looks like there's a ring on top of the piston but no scoring ect ..
2000 vstar650 has lights and battery cranks but wont start....help?
I have 1999 Yamaha v-star 650 classic so it running but one problem is I check up on fuel pump there both wire black-blue and black on negative battery I confused so must be one on positive is black-blue right? Black is on negative but both is on negative. Plz help me out. Fuel pump is work when I do hot wire test
what about the fuel pump relay?
Found that there is no way to get at the fuel line on the carb without removal of tank
Are you aware of a fuel pump relay for the 03 650? I am having trouble getting the fuel pump to work, 2nd pump and no joy.
Fuses checked.
I have fuel pouring out somewhere near the carburetors. Can the fuel line to the carburetor be replaced without removing the gas tank?
No it cannot.
The fuel line coming from the filter goes into a brass fitting that is used I guess to reduce the size of the hose. The hose from the other side of this fitting is missing and gas is pouring out. Do you know where that missing hose goes to from that brass fitting? Any help you can give is much appreciated.@@retrotechandelectronics
thanks
No problem
Where do you recommend I buy the fuel pump from, I have a 1998 model, same bike. Called Yamaha and they told me it's discontinued
20 came up when I typed vstar 1100 fuel pump into google.
Any way you can show how you bipassed the fuel pump?
By running a supply of fuel directly into the carbs.
So I have a 2006 and I have an issue with my tank pressurizing and depressurizing depending on the weather......in the cold the tank will have a vacuum which dents my tank badly. And in heat and pops them back out almost all the way....HELP! :(
Replace your gas cap
I heard nothing when I turned the key but the fuse is fine.
It might already be fully primed. Drain a little from the bowl and try again.
Would it be my fuel pump relay if I turn the key on and the bike comes on but the fuel pump doesn't cycle.
Folow the procedure step by step to determine the cause of failure
I have an 09 Yamaha V Star. I replaced the fuel pump the new fuel pump works but clicks when you first start the bike a clicks a couple of times quickly then slows down to every second or every other second just a tick tick tick wondering if it's a relay do you have any idea I watch the whole video but did not see the relay any help would be appreciated thank you
That’s normal. That’s full pressure with the floats stopping further fuel from moving through.
Oh I thought I was at a Maytag washer repair video. LOL
I have one of those as well.... ua-cam.com/video/w2ubr1Yc3wI/v-deo.html
I really appreciate your videos man! I had a question for ya though. I've got a 1999 yamaha vstar 650 and after purchase came across something odd. It has the fuel filter between the gas tank and the fuel pump, but also has what appears to be another fuel filter between the fuel pump and the carburetor. Have you ever come across this and would know why it exists? Is there a way I could contact you through an email or is this good for you? Either way for me. Thanks again for this video and for reading!
Generally on older bikes previous owners add filters not knowing there are others up or downstream. They start to collect over time.
hi mate....i just assemble new fuel pump but i had problem with overflow for about 4- 5 second everytime i turn on the key.....is it problem from new fuel pump or carb....?hope you can help me with some advise or solution
That sounds most likely to be a float bowl issue.
Would this cause a crank, no start issue?
How much fuel should be put out by the fuel pump when it primes cant find the info anywhere
Its not much, its just a supply to the bowls of the carbs.
@@retrotechandelectronics i was told there is a spec so you can assure its pumping the correct ammount or it may lean out at high speeds which is whst mine does. So if you check the flow for 5 secs and multiply it you get a certain fl/oz per min reading and can more accurately diagnose the pumps condition. My bike starts and runs fine but at about 45 its boggs out and almist dies...ive replaced coils, plugs, and main pick up as diagnosed in your other videos... still have what seems to be pump issue as carbs have brand new rebuild and perform well...
@@jordanestrin505 consider the amount of fuel consumption if this pump was doing little more that topping off the bowls at 45mph. If it’s not flowing it’s broke. If it’s flowing, you have other issues. If you are looking at cc’s per minute, no bike consumes that quantity
At 07:00 what did you mean it could’ve ran fine without a fuel pump?
The carbs were being gravity fed from a funnel off to the left, and did not require the fuel pump in that test.
@@retrotechandelectronics how do you test the fuel pump relay and what shuts the fuel pump off while running when the bowls get full?
Hi. I have a problem on my 2009 Yamaha v star 650.
It turns off while it’s running.
And after just shaking it
Stars again
Have you an idea about it?
Check your voltage regulator. They say it's a common problem with the v-stars
Dang I just realised this question was posted 2 years ago 😂
What if the pump doesn't click when the key is turned on the on position but when the kill switch is off it does? And then after the pump primes it doesn't keep flowing after 😂 that's what I'm dealing with
Sounds similar problem to me, did you solve it
I dont hear any clicking
Are the bowls full, drain them a bit and try again.
I put a new pump on and the bike still won’t start. It’s like the carbs still aren’t getting any gas !!! My pump might tik one time or maybe 2 but that’s it. Please help me
If the bowls are filled it won’t tick. Drain the bowls and try again
@@retrotechandelectronics the hose that runs to the carbs seems like it might be plugged or something cause it doesn’t seem to be getting enough gas to stay running. If I take the hose off the carbs and run it straight into a can it gets lots of gas but doesn’t seem to do what it should to start the bike.