Yamaha Sport ATV Forum

TORS testing

This is a discussion on TORS testing within the Yamaha YFZ450/450R (2004-Present) forums, part of the Performance /Technical category; I tested my Tors system by unplugging it where it connects to the thumb throttle assembly. When the throttle is at rest I get 0 ...


Go Back   Yamaha ATV Forum > Performance /Technical > Yamaha YFZ450/450R (2004-Present)

Reply
 
LinkBack Thread Tools Display Modes
Old 09-19-2004, 01:46 AM   #1
Senior Member
 
Join Date: Nov 2001
Posts: 287
View blaster91's Photo Gallery(0)
Default TORS testing

I tested my Tors system by unplugging it where it connects to the thumb throttle assembly. When the throttle is at rest I get 0 as a reading meaning the electricity isnt going threw. But if I push the lever I start getting a reading. Now I remember ready about guys welding those 2 wires together after installing a 400rx thumb throttle assembly. That means there's electricity going threw all the time. Does that mean my tors isnt working properly? Could that be the reason I have no spark?
__________________
2004- White and red YFZ450S
WR crank and piston
Burgard premium a-arms
Rpm axle
Streamline brake lines
Tag T2 handle bars and grips
Tm designworks chain slider & race chain roller
Trailtech -4 flywheel
20x6-10 front & 18x10-8 Holeshot mxr rear
omf reinforced front rims & omf rear bead locks
X-factor pro-pegs
Next mods
Esr intake GOT IT!
Jardine pipe GOT IT!
denton steering damper
blaster91 is offline   Reply With Quote
Old 09-19-2004, 05:46 AM   #2
Senior Member
 
Join Date: Feb 2004
Posts: 567
View FlyinYFZ's Photo Gallery(0)
Default

blaster91,

When you install the 400ex throttle assembly you will need to bypass the throttle switch by connecting the 2 wires together. The manual states how the TORS works but it is wrong.

The manual should read:

A. Normally, the throttle switch is open and the carburetor
switch is closed when the throttle lever is free.
When the throttle lever is pushed, the throttle switch is closed and the carburetor switch is open.

B. If both the throttle switch and the carburetor
switch is open due to a malfunction, the throttle
override system operates to stop the engine.
FlyinYFZ is offline   Reply With Quote
Old 09-19-2004, 03:25 PM   #3
Senior Member
 
Join Date: Nov 2001
Posts: 287
View blaster91's Photo Gallery(0)
Default

Ok so does that mean my tors is alright? How do I check the carb switch? I tested the other part of the connector of the thumb throttle assembly(the one that goes towards the carb I think). And I got a contiual reading. Meaning the power was going threw all the time. But I dont know if thats how you test the carb switch or not.
__________________
2004- White and red YFZ450S
WR crank and piston
Burgard premium a-arms
Rpm axle
Streamline brake lines
Tag T2 handle bars and grips
Tm designworks chain slider & race chain roller
Trailtech -4 flywheel
20x6-10 front & 18x10-8 Holeshot mxr rear
omf reinforced front rims & omf rear bead locks
X-factor pro-pegs
Next mods
Esr intake GOT IT!
Jardine pipe GOT IT!
denton steering damper
blaster91 is offline   Reply With Quote
Old 09-19-2004, 04:38 PM   #4
Senior Member
 
Join Date: Feb 2004
Posts: 567
View FlyinYFZ's Photo Gallery(0)
Default

Unplug the carb. switch, the connector with Yellow/Black and Black/Blue wires. Check for continuity at those 2 wires on the carb switch when your throttle lever is at rest.
FlyinYFZ is offline   Reply With Quote
Old 09-19-2004, 11:23 PM   #5
Senior Member
 
Join Date: Nov 2001
Posts: 287
View blaster91's Photo Gallery(0)
Default

Alright thanks will try that tomorow!
__________________
2004- White and red YFZ450S
WR crank and piston
Burgard premium a-arms
Rpm axle
Streamline brake lines
Tag T2 handle bars and grips
Tm designworks chain slider & race chain roller
Trailtech -4 flywheel
20x6-10 front & 18x10-8 Holeshot mxr rear
omf reinforced front rims & omf rear bead locks
X-factor pro-pegs
Next mods
Esr intake GOT IT!
Jardine pipe GOT IT!
denton steering damper
blaster91 is offline   Reply With Quote
Old 09-20-2004, 12:05 PM   #6
Senior Member
 
Join Date: Nov 2001
Posts: 287
View blaster91's Photo Gallery(0)
Default

Well I tested the connection with only 2 wires. And when the throttle was at rest I had continuity at those 2 wires. When I pressed the throttle the continuity stoped. At the thumb throttle assembly I tested the opposite. No continuity when the lever is at rest and it did have continuity when it was pressed on. I guess the tors is fine then right? Could the tps be the problem? I've narrowed it down to: stator, flywheel, mabe tps.
__________________
2004- White and red YFZ450S
WR crank and piston
Burgard premium a-arms
Rpm axle
Streamline brake lines
Tag T2 handle bars and grips
Tm designworks chain slider & race chain roller
Trailtech -4 flywheel
20x6-10 front & 18x10-8 Holeshot mxr rear
omf reinforced front rims & omf rear bead locks
X-factor pro-pegs
Next mods
Esr intake GOT IT!
Jardine pipe GOT IT!
denton steering damper
blaster91 is offline   Reply With Quote
Old 09-20-2004, 03:00 PM   #7
Senior Member
 
Join Date: Feb 2004
Posts: 567
View FlyinYFZ's Photo Gallery(0)
Default

Quote: Originally Posted by blaster91
Well I tested the connection with only 2 wires. And when the throttle was at rest I had continuity at those 2 wires. When I pressed the throttle the continuity stoped. At the thumb throttle assembly I tested the opposite. No continuity when the lever is at rest and it did have continuity when it was pressed on. I guess the tors is fine then right? Could the tps be the problem? I've narrowed it down to: stator, flywheel, mabe tps.
Yes, your TORS is testing correctly. The tps will not cause it to start hard or not start.
FlyinYFZ is offline   Reply With Quote
Old 09-21-2004, 10:56 PM   #8
Senior Member
 
Join Date: Nov 2001
Posts: 287
View blaster91's Photo Gallery(0)
Default

Thanks for all the help. I got my stator tested today and its fine. The cdi and coil has run on my buddy's machine so thats not the problem. I just dont know what is. And I have a race coming up this weekend.
__________________
2004- White and red YFZ450S
WR crank and piston
Burgard premium a-arms
Rpm axle
Streamline brake lines
Tag T2 handle bars and grips
Tm designworks chain slider & race chain roller
Trailtech -4 flywheel
20x6-10 front & 18x10-8 Holeshot mxr rear
omf reinforced front rims & omf rear bead locks
X-factor pro-pegs
Next mods
Esr intake GOT IT!
Jardine pipe GOT IT!
denton steering damper
blaster91 is offline   Reply With Quote
Old 09-22-2004, 12:00 AM   #9
Senior Member
 
Join Date: Feb 2004
Posts: 567
View FlyinYFZ's Photo Gallery(0)
Default

hmmm, I'm beginning to see a pattern here. Do you have your stock flywheel? I remember TrailTech said their flywheel isn't suppose to work with Vortex cdi's. Does that make sense? See if you can put a stock flywheel on.
FlyinYFZ is offline   Reply With Quote
Old 09-22-2004, 10:46 AM   #10
Member
 
Join Date: Jul 2003
Posts: 30
View BrilliantBloke's Photo Gallery(0)
Default

What is your test to check for spark? Are you laying the sparkplug on the head and then cranking the engine? The spark will be very small in free-air, you may have to shut the lights off to see it.
BrilliantBloke is offline   Reply With Quote
Old 09-22-2004, 01:01 PM   #11
Senior Member
 
Join Date: Nov 2001
Posts: 287
View blaster91's Photo Gallery(0)
Default

I usually ground the plug on the braket that hold the clutch cable. As for the flywheel it could be the problem cz thats the only thing I've changed. But it was running great for 2 weeks. I still have the stock cdi. My quad is at a friends house and his dad is going to compare it with his YFZ. So hopefully there is a broken wire somewhere or something.
__________________
2004- White and red YFZ450S
WR crank and piston
Burgard premium a-arms
Rpm axle
Streamline brake lines
Tag T2 handle bars and grips
Tm designworks chain slider & race chain roller
Trailtech -4 flywheel
20x6-10 front & 18x10-8 Holeshot mxr rear
omf reinforced front rims & omf rear bead locks
X-factor pro-pegs
Next mods
Esr intake GOT IT!
Jardine pipe GOT IT!
denton steering damper
blaster91 is offline   Reply With Quote
Old 09-22-2004, 04:56 PM   #12
Senior Member
 
Join Date: Jul 2003
Location: Minneapolis, MN
Posts: 1,319
View FAST1's Photo Gallery(0)
Default

Have you determined if your pick up coil is ok?
__________________
04 YFZ 450
GYT-R +1" A-Arms & rear DMI 1" billet spacers GYT-R Swing Arm Skid, Engine Skid, Front Bumper, K&N Filter,EHS Racing Lid, YZ Needle, Trail-Tech X bars and Clamp/Computer, Spider Grips / Wired- 22 guage, Motion Pro Twist Throttle, Jardine full exhaust
FAST1 is offline   Reply With Quote
Old 09-22-2004, 10:45 PM   #13
Senior Member
 
Join Date: Nov 2001
Posts: 287
View blaster91's Photo Gallery(0)
Default

The pick up coil is part of the stator I'm pretty sure. They both tested good.
__________________
2004- White and red YFZ450S
WR crank and piston
Burgard premium a-arms
Rpm axle
Streamline brake lines
Tag T2 handle bars and grips
Tm designworks chain slider & race chain roller
Trailtech -4 flywheel
20x6-10 front & 18x10-8 Holeshot mxr rear
omf reinforced front rims & omf rear bead locks
X-factor pro-pegs
Next mods
Esr intake GOT IT!
Jardine pipe GOT IT!
denton steering damper
blaster91 is offline   Reply With Quote
Old 09-22-2004, 10:56 PM   #14
Senior Member
 
Join Date: Jul 2003
Location: Minneapolis, MN
Posts: 1,319
View FAST1's Photo Gallery(0)
Default

Quote: Originally Posted by blaster91
The pick up coil is part of the stator I'm pretty sure. They both tested good.
as far as I know. the stator can test out fine but the pick up coil may not.

Then to make matters worse, you can not purchase the pick up coil unless you purchase the full stator assembly.
__________________
04 YFZ 450
GYT-R +1" A-Arms & rear DMI 1" billet spacers GYT-R Swing Arm Skid, Engine Skid, Front Bumper, K&N Filter,EHS Racing Lid, YZ Needle, Trail-Tech X bars and Clamp/Computer, Spider Grips / Wired- 22 guage, Motion Pro Twist Throttle, Jardine full exhaust
FAST1 is offline   Reply With Quote
Old 09-23-2004, 10:25 AM   #15
Senior Member
 
Join Date: Nov 2001
Posts: 287
View blaster91's Photo Gallery(0)
Default

I know about the part where you have to change both. But there are 4 wires coming from the stator cover. 2 for the stator and 2 for the pick up coil. The mechanic went over the whole bike and compared it to the other YFZ. Everything is fine! Except when you crank my bike. It doesnt have the same readings as the other YFZ. So he thinks it could be the tps system changing the timing and I think its the new flywheel. I'm heading over there in an hour to swap out the flywheel. If its not the flywheel I guess its the pick up coil and I wont be racing this weekend.
__________________
2004- White and red YFZ450S
WR crank and piston
Burgard premium a-arms
Rpm axle
Streamline brake lines
Tag T2 handle bars and grips
Tm designworks chain slider & race chain roller
Trailtech -4 flywheel
20x6-10 front & 18x10-8 Holeshot mxr rear
omf reinforced front rims & omf rear bead locks
X-factor pro-pegs
Next mods
Esr intake GOT IT!
Jardine pipe GOT IT!
denton steering damper
blaster91 is offline   Reply With Quote
Old 09-23-2004, 10:49 AM   #16
Member
 
Join Date: Jul 2003
Posts: 30
View BrilliantBloke's Photo Gallery(0)
Default

Under crank speeds, the CDI will discharge its capacitor on the trailing edge of the pickup nub (the metal bar on the edge of the flywheel). This will not change with or without a TPS hooked up.
BrilliantBloke is offline   Reply With Quote
Old 09-23-2004, 01:59 PM   #17
Senior Member
 
Join Date: Aug 2003
Posts: 1,405
View RPyfz450's Photo Gallery(0)
Default

Quote: Originally Posted by FAST1
you can not purchase the pick up coil unless you purchase the full stator assembly.
This sucks. We need to find a source for these components.
__________________
2004 YFZ450
RPyfz450 is offline   Reply With Quote
Old 09-23-2004, 02:57 PM   #18
Member
 
Join Date: Jul 2003
Posts: 30
View BrilliantBloke's Photo Gallery(0)
Default

Quote:
This sucks. We need to find a source for these components.
Why? a pickup coil is very reliable and has an extremely low failure rate. The only way they go bad is when the mechanic pinches wires or drops it.
BrilliantBloke is offline   Reply With Quote
Old 09-24-2004, 04:19 AM   #19
Senior Member
 
Join Date: Feb 2004
Posts: 567
View FlyinYFZ's Photo Gallery(0)
Default

Have you swapped out the flywheel yet?
FlyinYFZ is offline   Reply With Quote
Old 09-24-2004, 09:28 AM   #20
Senior Member
 
Join Date: Nov 2001
Posts: 287
View blaster91's Photo Gallery(0)
Default

Yeah and it worked! I finally have my quad back! A buddy of mine helped me to find the problem. They looked at everything on the quad. So I got there yesterday and took the flywheel off but didnt have time to put the stock one on. So superfastyfzrider did it. I'm racing tomorow so I'm going for a good ride before work. Thanks everyone for all the help and patience!
__________________
2004- White and red YFZ450S
WR crank and piston
Burgard premium a-arms
Rpm axle
Streamline brake lines
Tag T2 handle bars and grips
Tm designworks chain slider & race chain roller
Trailtech -4 flywheel
20x6-10 front & 18x10-8 Holeshot mxr rear
omf reinforced front rims & omf rear bead locks
X-factor pro-pegs
Next mods
Esr intake GOT IT!
Jardine pipe GOT IT!
denton steering damper
blaster91 is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Yamaha ATV Forum > Performance /Technical > Yamaha YFZ450/450R (2004-Present)


Search tags for this page

atvthumbtrottlewontworkwhenpushed

,

+how tors works

,

how can i test the yamaha tors system

,

450r tors

,

where is a tors switch on 450r

,

ktm throttle overide testing

,

how tors works

,

what is the tors tps on a 2004 trx 450r

Click on a term to search our sites for related topics.

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
testing myriad Other Models/Brands 1 01-17-2005 10:48 AM
testing sig. juststout News/Support/Feedback 4 02-21-2003 10:14 AM

» Discount Tire
Motosport.com

Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 07:08 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.