TPS on an '06 YZ450

I'm sending my carb out to Zip Ty Racing tomorrow, and while removing my carb I unscrewed the TPS. I've heard that this can be a major pain in the a$$ to readjust once I reinstall my carb. Any suggestions? I appreciate any help.

I'm sending my carb out to Zip Ty Racing tomorrow, and while removing my carb I unscrewed the TPS. I've heard that this can be a major pain in the a$$ to readjust once I reinstall my carb. Any suggestions? I appreciate any help.

I made the same mistake...and it is a real pain in the ass to recalibrate, period end

Nothing you can do until you reinstall except get ready to buy a decent voltmeter and work on your patience level....this task will try it to the max. Also intall the TPS on the carb with the screw hand tight - you will need to have the movement here to set / calibrate the TPS voltage.

When you reinstall the carb - make sure the subframe top bolt is connected, barely one one end, but loose all other bolts removed.

preinstall the carb into the front boot - to the cylinder - keep it relatively loose

you will need to get gas into the carb - as well as start it - it will only start with both cylinder and air boot/airfilter side attached and gas in the carb - remove the rear airboot clamp - otherwise you will destroy it. Also no need to install cables yet - but hot start plunger needs to be installed and the TPS Coupler

I got gas to the carb through the fuel line by just laying the tank on top of the frame - no install, just open fuel petcock to open position and close when carb is full and then remove the gas tank completely. The subframe at this point is loose and not connected except with top bolt - no nut - airboot is on carb.

Start the bike - immediately get the voltmeter out per the instructions in the manual pg 6-9 TPS Replacement and Adjustment. Insert the conductors per instruction into the TPS coupler - check the DCV voltage output. The range to calibrate the TPS is 0.58-0.78 V (DCV)

You will have to move the TPS at the carb to get this range (remember it is loose and moves about 1/8 of a inch or more) It is almost too tight in there to get your hands in...the pain in the ass part, - here is where it helps to have a 2nd set of hands. Once the voltmenter has this range showing, You will need to make a mark on the top of the TPS and the Carb with either a perminant marker or blade making sure the TPS does not move at all - the tricky part.

Remember you only have a very little amount of gas in the carb so check and double check the settings 2-3 times. Once you are comfortable the scribed marks = the correct voltage range, mark the TPS and the Carb - you remove the entire carb again tighten the TPS screw - with the marks aligning and reinstall, regas and double check the voltage range...if you are lucky it will show the same voltage range. If not start all over. When the voltage range is the same after tightening the TPS screw - reinstall the carb - tighten the boots (remember to reinstall the rear clamp at this time) Removing the entire Subframe, rear fender - makes it easier to reinstall the boot into the carb - then install the top bolts and side bolts.

The marks on the TPS and Carb will always be the ideal Voltage range - if you or another rider does this again.....

Good luck....:applause:

Thanks for the help GA450owner, sounds like I'm in for it.

Thanks for the help GA450owner, sounds like I'm in for it.

anytime.....at least once you do it for yourself.....you will know more about the bike than a lot of other people.....

Just be patient is is not that bad.....:applause:

That sounds like a big enough pain in the ass that I'd just leave the damn thing unplugged!

Or, leave it on the carb.

Alternatively, place a light punch mark on the carb, and a correspoding index on the TPS, and just put it back where it was in the first place.

Or, leave it on the carb.

Alternatively, place a light punch mark on the carb, and a correspoding index on the TPS, and just put it back where it was in the first place.

yep this is the correct way....I should have done this the first time:thumbsup:

I really appreciate the help guys, just sent the carb in to zip ty yesterday. Can't wait to get it back and start the fun.

I also accidentally removed my TPS before I learned not to. I read your detailed instructions to re-install but I do not have the manual you referred to for hooking up the leads to test voltage. Which wires do I use?

The yellow and black. They must be back probed, that is, the test leads are slid under the insulation of the connector while the connector is connected and the bike running.

Download a manual here:

http://www.yamahaownershandbook.com.au/?r=0

The yellow and black. They must be back probed, that is, the test leads are slid under the insulation of the connector while the connector is connected and the bike running.

Download a manual here:

http://www.yamahaownershandbook.com.au/?r=0

Greyracer - seems like this may start becoming contagious...any way of adding a Sticky or something like "WARNING WILL ROBINSON" or this, "DO NOT EVER REMOVE THESE"

or "PAINS IN SELF-REPAIR" :applause: :applause:

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