Yamaha Star 650 Ignition Testing and Troubleshooting - From The Battery to the Spark Plugs
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- Опубліковано 4 сер 2019
- In todays video we will be going through the complete ignition system from beginning to end to identify problems from within the system that might be causing issues with the bike. This is going to start off with the battery, because no voltage, no spark. Ill assume everyone has at least a cheap Harbour Freight volt meter by now, so well remove the side cover and get a quick voltage, you may need to throw your bike on the charger to continue later.
If the voltage is determined to be good, and/or the starter can turn the engine, the battery should be ok to continue. Above the battery and off to the right are the fuses. All should be checked before continuing onto the next step. Don't forget the Main fuse to the right if there is no indication when the key is turned.
Now we turn our attention to the coil. disconnecting all cables from the spark plug and the two coil connections. Remembering the positions. The two connections on back of the coil are measured for resistance to see if its in specification, this being primary side between 3.8-4.6 ohms. The secondary off one post and the end of the plug, plus adding 10K ohms, so subtract 10kohms from the meter value. to fall between 10.1 and 15.1 kohms.
There is also a pickup coil check to be done next this is between 182-222 ohms, this is pass fail. If it fails, well, this is a different video altogether, but at least points to the problem. Following this a good test if to measure battery voltage to the back of the coils as demonstrated.
This brings us to a test section where we want to make sure there is no gas in the carbs, so we run the starter until the carb bowls are empty, and/or drain the bowls. Using the spark gap test tool mentioned before, we can check for spark outside the engine by connecting this from the wire to the cooling fin and running the starter. Such a test confirms good ignition.
Still no spark with this good, this points towards the plugs, so its time to pull the plugs for inspection and gap measurement or replacement. The standard gap is .035. A plug test I use though not recommended is to ground the plug to the cooling fin to see if they work. - Наука та технологія
You absolutely saved our hind parts. You diagnostic video took us right to an open pickup coil. BAM! You are the man.
Glad I could help
Just want to say thank you. Because of this video, I was able to determine the pick up coil on my 05 650 vstar failed internally. I replaced it and the bike is running again. You were a big help!
Glad to hear!
I think that might be the issue with mine too but I might be setting my voltage meter to the wrong setting
thanks for your videos, this is youtube gold
Thanks much!
Everything about this is great, helped me fish out my ignition problems. Only thing I didn't like was the camera angles
Very Helpful video. Nicely done. Thanks for posting it.
You're welcome!
Excellent! Although there was nothing new to me in this particular, it was still enjoyable to watch. And the comments and footage are accurate, to the point, complete and informative. One of the very best instruction vidoes I have seen - you deserve a larger group of subscribers. A must for beginners!
Thank you very much!
Good job man helped me find my open circuit pick up coil
Glad to hear it helped!
Your videos are great!
Thanks Jim!
thank you verry much for the information . it served me well have seen all your videos on the yamaha. itwo own a vstar .again thank you verry ggod suff .
Glad to hear that you found the videos helpful.
I would had liked to see the tests for the ignition unit and the relays and diodes box
bro if theres no reading in the ignition coil where the wiring is attached is there something wrong with the winding inside ?
Thanks a million helps like you don't know..
Glad to hear it!
Man, thank you for sharing your knowledge!! I’ve made it to 10:28ish in the video, everything passes the electric and crank tests…except the plugs still aren’t getting spark.
She’s in neutral on ignition crank, opened and cleaned the kill switch real good, but scratching my head with no spark still. Anyone got an idea?
Great video
Glad you enjoyed it
Yea that'll help thanks brother
You're welcome.
Could you possibly tell me what color wires go to top and bottom of the front coil?
I bought a yamaha vstar 650 was park for a while and replace battery and I don't have spark is that may be the crankshaft sensor. Please let me know 🙏
I checked everything in my ignition with a multimeter just like in your video. All of my readings check out but I don't get any spark to my rear plug. Any Ideas I'm stumped. Thanks.
I have not checked the coil yet, but what if there is no spark on the spark plug? I tested the way you did to see the arc spark but no spark...should I check the coil?
Ah, at least now I have idea on how to approach ignition troubleshoot. Thank you!
Glad to help.
Do u happen to no what color is what on the 4 plug connector on the back on the key switch? Looking to relocate my key switch to the top of the tank like a Harley key switch is I no what is what on the new key switch I bought but I need to find out what color does what on the harness side of the key switch on the bike
I have a V-Star 650 battery is fully charged I put the key in the ignition the light on the dash glows the lights turn on the turn signals turn on but I don't hear no fuel pump and when I turn the key and I push the start it doesn't do anything it's like the bike doesn't even have a battery in it what could be the problem.
I got 120.4 on the pickup coil at 72 degrees is that bad?
how do i know if its my rectifier or my stator it wont keep charge have to jump start it its a brand new battery
Dang... I gotta get to my front ignition coil - that looks like a job and a half for a first timer.
I have a 1 when I check my pickup coil so I'm assumeing thats problem. I have no spark in either plug coils. I didn't think pick up coils ever went bad. Do you have a video about replacing that? Last year my bike was running 1 qt oil when it's supposed to have 3qt. I'm thinking the temp got to hot and caused problems. I think I'll replace stator also since im down there.
Sorry I do notyet have any video for pickup coil or stator replacement. When I do one I will document it.
ichecked everything you did and as all ok..but still wont thro spark? hat else could be the problem ..pleases mess me back
Does anyone know the key code for the Yamaha vstar 650?
I took off the tank and cleaned the carbs but now when back together -nothing, nada electrical for starting or anything else. The battery shows 9V and the charger says dead battery and that something is taking charging power and to take out the battery and try again. The guy I bought it from 2 years ago said the battery was new. Even w/9V wouldn't you hear solenoids clicking? You said there was one main fuse but I didn't see where that was.
9v is bad
Everything is going right until I get to the pickup coil....then it just doesnt read any numbers on my meter...and then you say that if it doesnt read right I have a another set of issues...where do I go if my pickup coil doesnt read at all
I see no spark from plug wires, changed fuel pump, cdi box, fuses are good, changed plugs also
Thanks for the video man! My Yamaha is having an issue where the front runs fine but the rear is off. At high rpms it seems to run ok but it dies at idle and it doesn’t run as hot as the front. I’ve ruled out carbs because those have been cleaned professionally and I’ve taken them apart again to make sure. It has to be a wiring issue but I even swapped the coils and it still has the same issue and got new plugs...
I dunno..... that sounds like carbs to me.,..
Did you ever figure out the issue? I’m having the same issue with mine also but the from cylinder is running off and a lot colder than the front.
HI, great videos, but I need your help. I cant find the tip up sensor, Can you tell where is it?
I’m not familiar with a tip up sensor.
I recently bought a 2007 yamaha xvs1300 without ignition keys, tried to bypassed and it cranks but no spark and fuel pump does not prime. Will this be the ecu that needs corresponding keys? More so is xvs 950 has same ecu for the xvs 1300?
I would recommend asking a dealer with title in hand what cans be done for a replacement kwy
Great Video. I do have a question. does the ECU send signal straight to the coils or is there a separate Igniter unit before the coils? I'm only getting spark out of one coil. They both tested fine.
There is in fact an igniter. It is the last thing, once troubleshooting is expended, it is swapped out to see if that is the ROF.
@Group2Matrix, did you ever get this resolved? My bike also gets only one spark out one coil
@@tungle7 turns out the bike has been sitting so long, the carburetor jets got clogged up during some time. Had to have the carb rebuilt.
@@retrotechandelectronics I only got spark out of the front coil. No spark on the rear one. Checked the coils and spark plugs are all good. Any idea or suggestions? Thank in advance.
@@Group2Matrix I mean did you ever find out what cause not getting the spark for the second coil?
Great video, unfortunately my bike still has no spark to either cylinder all my voltage and resistance tests are good. Last fall I did have the pickup stator replaced and on the way home it was backfiring really bad that was the last time it ran. Any help would be greatly appreciated. I even got to the point where I used my buddy's CDI to see if that was the issue still no spark.
The stator sounds like a smoking gun, at that point, I personally would start hooking up an oscilloscope to see if there was a signal coming off the pickup at all.
@@retrotechandelectronics right ya kn ow, because everyone has an oscilloscope laying around.
@@randallhupp4692 you reach a point as you dive deeper , eventually you will run out of test equipment.
@@randallhupp4692 there are scan tools with scopes built in
Great video, thx! How do you know what resistances are good or not? Owners manual? Exp?
Yeah 1.1M ohms (open) @ 6:04 time... pickup coil check video here I come! I'll see if i can find it, thx again.
Found a shop manual showing correct resistances, here it is for those who want one. braindump.donfick.com/media/9d/Yamaha%20v-Star%20650%20Shop%20Manual.pdf
Found this step by step procedure for replacing pickup coil www.650ccnd.com/coil.htm
I have the workshop manual for every bike and car i own.
Hav all the right voltage put a new carb pick up coil coil packs plugs fuel filter fuel lines and pump new computer box when I go to start it it sounds jus like your bike did when you pulled your plugs out don’t know what it could be
When contact position "on" The battery down almost to 10-9voltage, the battery normal or drop? Please help because i have problem drop voltage
try charging the battery overnight to see if it can hold a charge, then do a current test if it drops too quick.
I think my fuel pump on my vstar 650 is weak,when I give it gas to move it falls on its face.Have you ever changed a fuel pump on the 650?
I have a service manual coming this week,,,
I made a video about testing and replacing the fuel pump
ua-cam.com/video/UmL0GVs_4zw/v-deo.html
Could be filter
What if you can jump start thru the solenoid, but it won't turn over with the start switch? what's the problem there?
if it turns with jumping solenoid, then starter is fine? check switch make sure it has power on both sides
i did all these tests and i still have no spark. and idk why
So I’m having trouble with the bike turning over the battery is charged but it is not turning over however when I was checking it with voltmeter and had it attached to battery it turns over what might be the issue
Loose battery terminal connection?
Retro Tech & Electronics I’m thinking it might be a bad starter switch could that be it ?
I have a 03 vstar an the start button is not working and I'm not get spark can u help with that
check kickstand switch
I think I reversed the polarity of my bike bc of the new battery I bought. Now with the right one I get nothing.
Okay so when testing the pick up coil / stator what color are the wires
…
@@retrotechandelectronics yah I get it
Great video, my problem is that bike wont do anything when press start button any ideas ?
@@mikejohnson601 no i sold the bike 😅
I got power at my coils but no spark at all either cylinder.. plus I don't hear my fuel pump just thumps once and that's it
drain some fuel from one of the carb bowls and see if the pump cycles to refill it when the key turns on.
Ok that was the problem with fuel pump. But when I test my pickup the meter just jumps shows a k then overload
So apparently o l means open loop so that means my pickup coil is shot then right if I get no reading?
What i need to check starts at 2:35
What if there is no spark
DO NOT wire wheel your plugs!!! It leaves behind residual metal from the bristles and will short it. Best to blast them with glass beads with a spark plug cleaner. I know this from practical experience.....
Didn't help me at all. Did all the test you showed and everything was within specs and still no spark and not a freaking clue why. This bike makes no sense why it does not spark at all.