Hi, I am new to the forum and also new to Yamaha.
I picked up a 1987 Warrior for my wife. I am having problems getting it to run. I have completely rebuilt the bike from a bare frame. I can make the bike run if it is oulled with another vehicle but as soon as you slow down to unhook the strap it dies. I can not start it with the electric starter or the recoil starter. The bike started before it was disassembled but ran poorly due to excessive clearance in the cylinder bore. I have tried changing the Stator & CDI with both the old ones and new ones and it does exactly the same thing. I have removed the entire wire harness from the bike and checked all connectors and checked continuity on every wire. Everything tests good. I have tried 3 different coils and spark plug wires. No difference. I am not even worried about the carb as it will not even run on starting fluid. I do not seam to have enough spark when cranking. The orange wire from the cdi to the coil does not seam to be getting power.
Any ideas would be great as I have absolutely no more ideas on how to fix it and I have spent a good 30 hours or so trying to make it run.


Here is my complete parts list so far.

Frame Paint - Citrone Yellow (Original Muscle Mopar Color)
Powder Coated Swingarm & Grab Bar - Gloss Black

Weisco .020 Piston Kit
K&S Top End Gasket Set
MSD Ignition Coil
Accel 8.8 Ignition Wire
NGK DR8EA Spark Plug
K&N Filter w/Outerwears
Modified Air Box Lid w/Outerwears
White Brothers Mikuni VM36 Carb Kit
HMF Slip-On

Ricky Stator Full Stator Assembly
New Yamaha CDI
Interstate Battery
New Oversized Battery Cables

MSR Handlebars
ProTaper Grips
Moose Competition Brake Lever
Ez Pull Clutch Perch & Lever
Motion Pro Throttle Cable 01-0647
Motion Pro Clutch Cable
Modified IMS Flightline YZ250 Shift Lever

Diamond J Customs Front Widening and Shock Conversion Kit +6.0"
Honda 400EX Front Shocks
American Stars MX Star Chromoly Tie Rods +3
01 Warrior stock Rear Shock
All ***** Swing-arm Bearing Kit

DID 520 O-Ring Chain - 100 Link
PBI 13 Tooth Front / 42 Tooth Rear Sprockets
ITP T-9 Pro Series Baja Rear Wheels Black 4/115 9x9 3.0+6.0
ITP T-9 Pro Series Front Wheel 4/156 10x5 2.0+3.0
Maxxis Razr 20x11x9 Rears
ITP Holeshot MXR6 20x6x10 Fronts

EBC Rear Brake Pads
ECA Parking Brake Block Off Plate

90-up Plastics, Front Bumper & Headlight Assembly
Diamond Plate Body Skid Pad
Armadillo Swing-arm Skid Plate
Jarden Nerf Bars
Custom Covered Seat
Modified 2005 Raptor Heel Guards

Pics:

 

 

the CDI goes in the back beside the rectifier it looks like you have it mounted where the coil goes...im not sure how good it is to use a msd coil but all ive trusted to use was oem or ricks,something with the wiring or parts has to be wrong something between the CDI, Stator(pick up coil,source coil),Ign Coil.

 

On a 87 and 88 the CDI is mounted in the front. It is correct and mounted where it should be. As for the coil, I have tried using a coil from another running 90 warrior and it makes no difference. I agree there must be something wrong with the wiring but the wiring is unchanged in any way from when it ran before I took it apart. I have not modified the harness in any way except to change the headlight connectors to work with the 89-up style lights. The battery cables I made are identical to the factory cables just a bit larger in size. All connections have been checked and all wires have been checked for any cuts as well as continuity. I have removed the complete harness from the bike and unwrapped all the tape and checked each individual wire. Then the complete harness was re-wrapped and reinstalled. This was done after the bike was complete. So it is not like I changed anything. As I said the bike ran before it was disassembled. I also did not change the CDI or Stator assembly untill after the bike was complete. These parts were changed trying to make the bike start as that is what I was told by many people were typically the problems with these bikes. I have really no other ideas.

 

oh ok didnt see where u said it was 87, i saw the headlight and hood and figured it was newer...yea this sucks...i had a few odd problems like this once before....one time it was the start/run switch and the other time it was the key switch...warriors are pretty known for funky electrical problems...head over to yfm350.proboards.com theres some more warrior experts over there who can hopefully help you out.