HOW TO CHECK IF CDI IS BAD??? - Yamaha ATV Forum
 
LinkBack Thread Tools Display Modes
post #1 of 11 Old 03-14-2004, 05:24 PM Thread Starter
Member
 
Join Date: Feb 2003
Location: Hickory, North Carolina
Posts: 47
HOW TO CHECK IF CDI IS BAD???

I have an 88 warrior and suspect the cdi is bad. I have a service manual but it checks out. The reason I think the cdi is bad is that i have to hook up my new stator backwards in order to get fire at the spark plug. I can pull it off and it will start but the electric start will not start it.

88 Warrior. Wiseco 10.25 .40 piston, BMW valves each .1 larger, Ported and Polished head, .390 WB cam, Titanium Valve Springs and Retainers, Alba aluminum air box, K&N filter, Keihin 38mm PE carb.
custom_warrior is offline  
Sponsored Links
Advertisement
 
post #2 of 11 Old 03-16-2004, 05:57 PM Thread Starter
Member
 
Join Date: Feb 2003
Location: Hickory, North Carolina
Posts: 47
Does no one honestly know how to check if the cdi is bad? I checked it by the service manual. I want to know if there are any other ways to check it. If i take it to yamaha, do they do different checks other than the service manual???

88 Warrior. Wiseco 10.25 .40 piston, BMW valves each .1 larger, Ported and Polished head, .390 WB cam, Titanium Valve Springs and Retainers, Alba aluminum air box, K&N filter, Keihin 38mm PE carb.
custom_warrior is offline  
post #3 of 11 Old 03-16-2004, 07:02 PM
Senior Member
 
YamahaForever's Avatar
 
Join Date: Jun 2003
Location: Grand Rapids, Michigan
Posts: 1,596
Send a message via AIM to YamahaForever Send a message via Yahoo to YamahaForever
Try calling and asking the guys at yamaha.

06- 700 Raptor
Sold-2002 Black Raptor 673
-PRM, Renthal, Trailtech, Dyno Jet, K&N filter kit from Noss, Durablue +2, +4,
Weisco 101mm 11:1 high compression, Hot Rods stage 2 cam, Kibblewhite valves
YamahaForever is offline  
Sponsored Links
Advertisement
 
post #4 of 11 Old 03-16-2004, 07:14 PM
Primo Member
 
montycarlo's Avatar
 
Join Date: Dec 2002
Location: Newton, Iowa
Posts: 5,563
I don't know how to physically test the CDI - Given a little test equipment and a wiring diagram I can eliminate all other possiblities though.

--McPartlin & Sons Racing--
Iowa ATV Harescramble Series
Dave- B class #141 08 Outlaw 450MXR
Landon 07 KFX50 50cc Stock #99
Conner- Radio Flyer (AA hopeful!)
montycarlo is offline  
post #5 of 11 Old 03-16-2004, 07:16 PM
Senior Member
 
Join Date: Jul 2002
Location: Everywhere
Posts: 5,055
If the CDI was bad, then there'd be NO spark and therefore it wouldn't run. You prolly have a bad start switch. But I don't get fully hat you are aying by hooking the stator backwards. One more thing. If you take it to the dealer, they will stick some kinda test meter in the wiring. On my old Warrior, I had power all the way up to the CDI and he told me it a bad but it was gonna cost $300 to replace.

To many.....
MrSlithers is offline  
post #6 of 11 Old 03-16-2004, 08:13 PM
Senior Member
 
Join Date: Dec 2002
Location: Mid Michigan
Posts: 638
You can always buy one off eBay and do a swap. If it was bad, you now have the replacement. If it was good you can make your money back be reselling it. It doesn't sound right. It sounds like you got a different year stator with a different plug setup.

87,88,91,97Warrior
04KFX
03 S-10 Crewcab
Quad82 is offline  
post #7 of 11 Old 03-16-2004, 10:19 PM
Senior Member
 
Join Date: Jan 2002
Location: N.E. MO
Posts: 2,352
I don't understand the whole hook it up backwards thing either, but if I remember right according to the manual the only way to test the CDI is by process of eliminations. (If everything else is good then the CDI must be bad). I went through this on my warrior when I first got it. It would run if you pull started, (tow rope, another quad, you know), but it might or might not start with the electric starter. As time went on it got so it wouldn't start at all with the starter and finally wouldn't run at all.
Problem; BAD STATOR.
CDI's seem to hardly ever go bad but the warrior seems to have a problem eating stators. I've had 2 and both had bad stators.

03 Raptor Bone stock... Honest!

03/04 Raptor built from parts.
It's stock too of course...
1stWarrior95 is offline  
post #8 of 11 Old 03-17-2004, 06:43 AM Thread Starter
Member
 
Join Date: Feb 2003
Location: Hickory, North Carolina
Posts: 47
Thanks for everyone's replies. I have a brand new Ricky stator installed. Is there anyway the pickup coils can be installed wrong??? From my understanding there are two pickup coils. One for run and one for start. What is causing the start side of the pickup coil to not fire???

88 Warrior. Wiseco 10.25 .40 piston, BMW valves each .1 larger, Ported and Polished head, .390 WB cam, Titanium Valve Springs and Retainers, Alba aluminum air box, K&N filter, Keihin 38mm PE carb.
custom_warrior is offline  
post #9 of 11 Old 03-17-2004, 09:09 AM
Crowd Control
 
diggerzmound's Avatar
 
Join Date: Oct 2002
Location: Nebraska
Posts: 8,387
Garage
Send a message via AIM to diggerzmound Send a message via Yahoo to diggerzmound
There are two coils, one is for charging your battery(charging coil) and one is for generating a pulse for your ignition coil(lighting coil). The cdi's main function is to control the point at which the spark is delivered to your spark plug, the cdi basically took the place of the old points systems. If it runs at all the cdi and the stator are good, as well as the coil. As for your wiring issues, depending on whether the ricky stator comes with or without leads, it coulda gotten soldered on the wrong way. Turning the wires around wouldn't be a big deal.

Sounds to me like it is a starting system problem. First thing first, make sure your battery is in good shape, next clean all your battery connections, both sides of your battery cables, both sides of the starter wire, and then your solenoid signal wire. If it still doesn't start, try to short the solenoid across both big terminals. If that turns the starter, it is probably the solenoid, or the starting relay or button.
diggerzmound is offline  
post #10 of 11 Old 03-17-2004, 10:35 AM
Senior Member
 
Join Date: Jan 2002
Location: N.E. MO
Posts: 2,352
There's 3 components in a warrior stator.
I don't know the exact names of them but the main big round part is the charging coil. Then there's another coil attached to the charging coil, that's the trigger coil. Then there's one or two little coils that are on the outside of the flywheel. Some warriors have one and some have two of these little coils. I think they're called pulser coils, (or something like that), but don't quote me on that.
If your warrior will start and charge the battery the charging coil is okay. If it won't start its's one of the other coils more than likely. When the CDI goes bad it won't run at all. When a stator goes bad it goes bad a little at a time until it won't run at all.
The stator was going bad in my 95 when I got it but it would charge the battery if you could get it to run. I bought a used stator off of Ebay and it's run every since. Then I got an 87 warrior. It would run but wouldn't charge the battery. I took the old stator from my 95 and put the trigger and pulser coils on it from the 87 and then it would run and charge the battery.

I'm still guessing your problem is the stator. Maybe Ricky put the wrong color wires in the wrong place or something. I'd call him and ask his opinion.
(Just don't tell him you wired it backwards!)

03 Raptor Bone stock... Honest!

03/04 Raptor built from parts.
It's stock too of course...
1stWarrior95 is offline  
post #11 of 11 Old 03-19-2004, 02:09 AM Thread Starter
Member
 
Join Date: Feb 2003
Location: Hickory, North Carolina
Posts: 47
Today I tried my truck battery and it still did not change anything. I found that the Ricky stator had bad connections. Two of the wires were frayed and out of the connector. My warrior has never even been ridden. I will call him tomorrow and ask why this happened. Another thing, the connector off of the stator going to the cdi, in the manual and the original stator had yellow, blue, green wires. The Ricky stator has and extra white wire, but i do not know if it was connected or not. The starter bucks when you hold down the start button. My stepdad, mechanic, said it feels like start coil on the stator is not giving the timing needed to start it. Well I hope i get it fixed so I can ride it this summer before I go off to a four-year university. If anyone else can help me it is appreciated, thanks for all of the help, I will keep you updated.

88 Warrior. Wiseco 10.25 .40 piston, BMW valves each .1 larger, Ported and Polished head, .390 WB cam, Titanium Valve Springs and Retainers, Alba aluminum air box, K&N filter, Keihin 38mm PE carb.
custom_warrior is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Yamaha ATV Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
SPEED SENSOR FIX DONE CHECK IT OUT NO CHECK ENGINE EASY oversize Yamaha YFM700R Raptor (2006-Present) 5 09-02-2007 01:05 AM
Check this out!!!! Voodoo Yamaha YFZ450/450R (2004-Present) 7 01-05-2005 03:00 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome