Question about yamaha Warrior

[BigRed350x]

i have a 99 warrior that has been out of commision for some time now. I started to fiddle with it the other day and I was hoping you guys could help me out...

 

I was riding one day and it started to run weird. Would miss every few strokes at high rpm, breaking up etc... took it back to the house and it would never run after that. Checked everything i could think of and couldn't fix it so I took it to the stealership. They said it was a bad stator and couldn't check other stuff till that was replaced. They tested the coil and it tested just fine. So I took it home and it sat forever till I got a new stator.

 

Bought a new high output ricky stator, new battery, new starter (old one was getting weak, brushes probably) put all that in, new plug. Here's the problem...

 

It will start and idle awesome, but as soon as I give it some gas it will break up and pop and backfire on the exhaust side real bad. the more gas you give it, the longer the backfire. just off idle= blap blap blap full throttle= blap blap blap

I tore the carb totally apart, cleaned every single part, no fix. Jetting was right on before the problem. I checked valve lash and it is right at what the clymer manual says.

 

Warrior's use the CDI to advance the timing as you rev up and I am thinking the CDI unit is bad or lost a capacitor on the high rev side since it will idle and run great at idle, but goes to shit at about 1200-1500 rpm. Other than the CDI the only other thing I can think of would be weak valve springs. They are strong enough to pull closed at low rpm but when it revs they aren't strong enough to pull the valves closed at the higher rpm. The bike is pretty much stock except a K&N clamp on kit, and FMF Megamax II silencer with powerbomb header.

 

Do you guys think it is a CDI problem or something else? I am pretty sure its not jetting since it was jetted just fine before the problem and I cleaned the carb twice to be sure nothing was plugging up a main jet or something... Please Help!

Edited June 23, 2005 by BigRed350x

[Dead Op]

I had a problem kind of like this with my 93 Timberwolf, I had to replace the CDI.Man I miss her

[darren61462]

i have a 99 warrior that has been out of commision for some time now.  I started to fiddle with it the other day and I was hoping you guys could help me out...

 

I was riding one day and it started to run weird.  Would miss every few strokes at high rpm, breaking up etc...  took it back to the house and it would never run after that.  Checked everything i could think of and couldn't fix it so I took it to the stealership.  They said it was a bad stator and couldn't check other stuff till that was replaced.  They tested the coil and it tested just fine.  So I took it home and it sat forever till I got a new stator.

 

Bought a new high output ricky stator, new battery, new starter (old one was getting weak, brushes probably) put all that in, new plug.  Here's the problem...

 

It will start and idle awesome, but as soon as I give it some gas it will break up and pop and backfire on the exhaust side real bad.  the more gas you give it, the longer the backfire.  just off idle= blap blap blap full throttle= blap      blap      blap

I tore the carb totally apart, cleaned every single part, no fix.  Jetting was right on before the problem.  I checked valve lash and it is right at what the clymer manual says.

 

Warrior's use the CDI to advance the timing as you rev up and I am thinking the CDI unit is bad or lost a capacitor on the high rev side since it will idle and run great at idle, but goes to shit at about 1200-1500 rpm.  Other than the CDI the only other thing I can think of would be weak valve springs.  They are strong enough to pull closed at low rpm but when it revs they aren't strong enough to pull the valves closed at the higher rpm.  The bike is pretty much stock except a K&N clamp on kit, and FMF Megamax II silencer with powerbomb header.

 

Do you guys think it is a CDI problem or something else?  I am pretty sure its not jetting since it was jetted just fine before the problem and I cleaned the carb twice to be sure nothing was plugging up a main jet or something...  Please Help! 

384932[/snapback]

 

Check (disable) the parking brake rev limiter and it should rev out. This happened to my nephew's warrior and it ran fine afterwards......

[BigRed350x]

Check (disable) the parking brake rev limiter and it should rev out.  This happened to my nephew's warrior and it ran fine afterwards......

384961[/snapback]

 

Come on, I'm not that dumb. That was the first thing to go on that bike. Parking brake on any yamaha is pretty much worthless.

 

Any other ideas?

[rebelbanshee2]

there is a limiter for reverse too. Check the contact on the ground wire going on the reverse handle, also check for any worn through wires that could be shorting on the frame and check that parking break switch again. I have had all 3 of these things cause the same proplem on my former warrior

[hittintrees srh]

just sell the P.O.S.

 

problem solved.

[suzuki0702]

hey go on ebay ... i had a 2001 and same thing happened to me after my g/f swamped it and wrecked it a whole bunch of times...bought a carb rebuild kit for it and traded it for my banshee ...=)

[slowpokebanshee]

I had a 97, and agree, check that ground wire on the reverse lever, as well as other grounds, sounds like smae problem I had...good luck

[GYTWYPT]

for sure the ground wire for the reverse. I just grounded mine to the frame. If not maybe an air leak in the intake boot but you sound a little to knowledgeable for it to be something as simple as that. I should have traded it for my banshee but i gave it to my dad so i still have to figure out what is wrong with the 4 stroke POS.

 

later