if you just read my thread you know i have a 95 scrammy i put car driving lights on it as it did not have any lights but as soon as i started it and started riding i started to sputter and backfire real bad and now it wont start and has no fire at the plug, does anyone know what this is if its the coil can you tell me how to test this and if i test it and it doesnt have incoming power what would i check would the cdi do that?

 

Were the car driving lights on when this happened? You may have over loaded the stator and it caused a short.. and lack of voltage could be the reason why it sputtered and backfired...

 

yeah they were on but i tried to turn them off and it still did it now it wont start at all so what do i do if its the stator do i buy a new one or what

so you dont think it could be the cdi

 

First you need to test the stators output with a volt meter.. should be around 12volts at idle.. If the stator is bad you can buy a new one or have it rewound...

When dealing with electrical components its all about testing believe me i learned the hard way..

 

how do i test the output i have a tester i just dont know where to check these things

 

Best thing i can tell ya is to get a service manual and start testing everything... I would start with the charging system, and then so on.. If your not getting spark then its ether your CDI is bad or your not getting power to it.. From what you said with the added lights i can bet the CDI is not getting power.. Sounds to me like a fuse blew or you shorted something...


If you any questions you can PM me anytime..[img]i/expressions/face-icon-small-wink.gif[/img]

 

I am not sure on the 400 i have never worked on one before..


I really hope one of the 400 guys see this and can help you more...


sorry i wasn't more help...

 

ok do you know where the cdi is and how do i test it i dont have a manual because the dealer said they r on back order so i dont know what to do

 

On mine its mounted next to the steering stem on the front of the quad under that center plastic piece...


If i had my manual handy i could check to see how to test the CDI but its in my garage... If no one tells you by morning when i see this post i will for sure get my manual and tell you how to test the CDI...


Later,
TrailRider

 

These engines actually have 2 circuits in the stator - a charging system circuit, and an ignition exciting circuit (this is why you can start the bike with a dead battery)

You have tried a new spark plug when checking for "fire"?

The Clymer manual gives no testing proceedure for the CDI module - says they are not available.

You can test the ignition generation coils in the stator by disconnecting the wires to the CDI box (on my '95 scrammy the CDI is under the front "hood", mounted flat down on the frame cross piece - square box - has (1) 3 pin connector and (2) single wire connectors) - - read resistance across the black/red to brown/white wires (wires from the harness, not CDI box) - should be 120 ohms.

The ignition coil can also be tested by reading resistance for the primary - from the small plug to coil ground (0.3 ohms) and for the secondary - from high tension wire (spark plug wire - with spark plug cap removed) to the coil ground (6.3 K ohms). The spark plug cap itself will have a resistance reading of 3.7 - 6.3 K ohms.

If all of these resistance readings are within specs, then the CDI is most likely your problem.