SRX NO sparky

YAMAHIZAL700

YAMAHIZAL700

New member
Joined
Feb 12, 2005
Messages
863
Age
44
Location
durham, ME
Hey guys. Hope you guys had a great summer. Now that Im in yammy mode I dug out my sled last night and draged her into the gargage. Its been at my inlaws all summer parked next to a field so I wanted to open the hood and make sure that there were no signs of mice lurking. After poking around a bit everything looks like it did when I left it but after pulling it over 8700 times I pulled out a plug to see if I had any fuel which I do. Next thing I did was pull it over with the plug out and I dont have any spark. I have the key on and kill switch on but the headlight does not light up when I pull it over. Ive got a few ideas on what to check but I figured I see what you folks have to say.
 

first thing I would look at is the flywheel, if its all rusty right theres your first thing to clean. If you leave these things sit outside and dont dose them with wd40 or some other sort of lube under the hood on everything, you get little suprises like this when it comes time to use them from condensation and moisture from being outside all year.
 
I was afraid of that Ill have myself a look. One thing to note is after unpluging the connection for the seat i did get my headlight to come alive as I pulled it over. I still have no spark at the plugs. I checked the wiring harness where it runs under the handlebars cowl and retaped a few areas.(No rubthroughs, just adding fresh tape) It all looked good. I removed the cdi and electrical components above it checked connections and all looks good. Im headin back out to check out the flywheel. Ill see how things look in there. Thanks for your input.
 
Did you check the wiring harness under the motor? I lost all spark and lights when it rubbed through there. Just a thought
 
Im a little stumpped right now. I had a little surprise hiding behind the muffler. SOme little critter had build a home out of insulation and crap. I removed the pull start and did find some rust on the flywheel and cleaned it with some sand paper but it hasnt fixed the problem. Ive done a lot of surveying of the wiring harness but havnt seen whats under the motor yet. The thing that is really messing with me is it ran great when I put it up last year so what has hapened since spring and now. Im wondering if the little bastard living in there chewed through my harness at all. I dont know.
 
hahaha ya that would be my bet.... I had a mouse nest in the old v-max 4, parents didnt agree on keeping it inside the shed for the summer.... Well the mouse got in and chewed a bunch of wires, had all sorts of little electrical gremlins come out when it happened. Definately go over that wiring harness inch by inch cuz them dam mice will chew almost anything.
 
then the next step is to hook up your digital voltmeter on the pick up coil wires and pull the engine over and see if the pick up coil is functioning. if its working correctly then it will read varying voltage based on the rpm when you pull the recoil handle.

Then you go to the cdi box to see if the signal coming from the pick up coil is triggering the cdi box

then you go to the coils to see if the signal is coming from the cdi box.

its actually very simple to trouble shoot a no spark problem, you simply start from the source and work your way to the spark plugs.
 
mrviper700 said:
then the next step is to hook up your digital voltmeter on the pick up coil wires and pull the engine over and see if the pick up coil is functioning. if its working correctly then it will read varying voltage based on the rpm when you pull the recoil handle.

Then you go to the cdi box to see if the signal coming from the pick up coil is triggering the cdi box

then you go to the coils to see if the signal is coming from the cdi box.

its actually very simple to trouble shoot a no spark problem, you simply start from the source and work your way to the spark plugs.
Click to expand...

Thanks for the info guys. I dont have a volt meter here, Ill have to grab one from home and come do some testing another day. The sled should run with the tail light unhooked buy my right foot right. I just want to make sure im not missing anything.
 
I bet that mouse was hungry and decided to eat some wire, I know you think...what the??? Mice like wire, I don't know why but they do. I wonder which color tastes the best? Good luck, I'd take the simple things off like the air box and take a look around.
 
by doing the test from the source to the end, you can tell where to look in the harness, if your signal comes from a part and doesnt reach the next componet in line you know where the problem is! Its alot easier then just fishing for the problem. :o|
 
YAMAHIZAL700 said:
Im a little stumpped right now. I had a little surprise hiding behind the muffler. SOme little critter had build a home out of insulation and crap. I removed the pull start and did find some rust on the flywheel and cleaned it with some sand paper but it hasnt fixed the problem. Ive done a lot of surveying of the wiring harness but havnt seen whats under the motor yet. The thing that is really messing with me is it ran great when I put it up last year so what has hapened since spring and now. Im wondering if the little bastard living in there chewed through my harness at all. I dont know.
Click to expand...
Yeb & if I were a little critter, I know I would like yamaha for lunch :rofl:
 
mrviper700 said:
by doing the test from the source to the end, you can tell where to look in the harness, if your signal comes from a part and doesnt reach the next componet in line you know where the problem is! Its alot easier then just fishing for the problem. :o|
Click to expand...

Hi, I hate feeling ignorant but what is the proper way of usin g my volt meter to test the parts? Do I unplugg the harness and touch the contacts or do I leave them pluged in and go throught the back of the connector and then ground the black to any ground. I have a voltmeter but have never used it or learned how. I know I can figure it out but I figure someone that know already can keep me from going throught the learning phase.
 
for the pick coil check i unplug it and stick your probes right in the wires(socket), pull it over and see if you have varying voltage based on the rpm you pull the engine over at, if yes, then reconnect the wires and move up by the cdi box, same color wires and check again(this time youll be piercing the insulation by the cdi box, check for same varying voltage, if yes, that means the wiring is also good up to this point, then move to the output on the cdi box, is there varying voltage(be higher voltage as well) coming ut of cdi box?
 
Last edited:
mrviper700 said:
for the pick coil check i unplug it and stick your probes right in the wires(socket), pull it over and see if you have varying voltage based on the rpm you pull the engine over at, if yes, then reconnect the wires and move up by the cdi box, same color wires and check again(this time youll be piercing the insulation by the cdi box, check for same varying voltage, if yes, that means the wiring is also good up to this point, then move to the output on the cdi box, is there varying voltage(be higher voltage as well) coming ut of cdi box?
Click to expand...
Thank you very much for your help. That def help clear things up a bit. When I get back to the sled Ill post an update.
 
mrviper700 said:
yes, thats correct
Click to expand...
Hi mrviper. I cant figure out how to use my volt meter. can you give me step by step for testing. I hate to be a pain i just dont know how to use my volt meter. Like what setting to use. or which red or black terminal to plug in where or does it matter. Ive never done much electrical before.
 
Im still frustrated. WHen I test the pick up coil for a varying volt readings what setting do I switch the meter too. I can usually pick things up pretty quickly but Im having a hard time with this.
 
set meter to dc volta and on the 20k scale, should read low varying voltage when you pull it over, put probes in the pick up coil wires
 
You must log in or register to reply here.


Back
Top