TORS testing - Yamaha ATV Forum
 
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post #1 of 20 Old 09-19-2004, 01:46 AM Thread Starter
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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
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post #2 of 20 Old 09-19-2004, 05:46 AM
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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.
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post #3 of 20 Old 09-19-2004, 03:25 PM Thread Starter
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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  
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post #4 of 20 Old 09-19-2004, 04:38 PM
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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.
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post #5 of 20 Old 09-19-2004, 11:23 PM Thread Starter
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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  
post #6 of 20 Old 09-20-2004, 12:05 PM Thread Starter
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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  
post #7 of 20 Old 09-20-2004, 03:00 PM
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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.
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post #8 of 20 Old 09-21-2004, 10:56 PM Thread Starter
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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  
post #9 of 20 Old 09-22-2004, 12:00 AM
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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.
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post #10 of 20 Old 09-22-2004, 10:46 AM
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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.
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post #11 of 20 Old 09-22-2004, 01:01 PM Thread Starter
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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  
post #12 of 20 Old 09-22-2004, 04:56 PM
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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
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post #13 of 20 Old 09-22-2004, 10:45 PM Thread Starter
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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  
post #14 of 20 Old 09-22-2004, 10:56 PM
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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
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post #15 of 20 Old 09-23-2004, 10:25 AM Thread Starter
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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  
post #16 of 20 Old 09-23-2004, 10:49 AM
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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.
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post #17 of 20 Old 09-23-2004, 01:59 PM
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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
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post #18 of 20 Old 09-23-2004, 02:57 PM
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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.
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post #19 of 20 Old 09-24-2004, 04:19 AM
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Have you swapped out the flywheel yet?
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post #20 of 20 Old 09-24-2004, 09:28 AM Thread Starter
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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  
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