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DT125R Forum -> YPVS -> ypvs don't work
Post Info TOPIC: ypvs don't work
acsp


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ypvs don't work
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Hello

I have DT 125 RE 2006.

when i put the key in position ON, the power valve servo made the self cleaning 3 to 4 times.

when in start the engine and is running, and i push for throtle, the power valve servo donīt work.

The power valve doesn't open.

The bike don't have speed meter, the green/black wire is connected to earth (-)

Some help guys.

 

 



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Calum122


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Take the PV cover off. It's on the LHS of the bike. Turn key on the on pos. Anything happening? Give the bike some revs with the cover off. Are the wires moving?

Has the bike been over bored? I.e. has a new piston off bigger size than standard been fitted? Has the PV been modified to compensate?

Take the exhaust off. Turn key on and off. Is there any obstructions in the way.

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GADGET


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Also clean the valve out (carbon )

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acsp


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Take the PV cover off. It's on the LHS of the bike. Turn key on the on pos. Anything happening?

Yes, the power valve open and close, three times. self-ceaning.

 Give the bike some revs with the cover off. Are the wires moving?

No, the wires donīt move.

I take out the wires from the pv, and they move in the on position, but when i start the bike and give some revs to the engine the wires don't move.

I think is some electrical problem, but......



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GADGET


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I think maybe a broken signal wire from Cdi coz when it's got power it wakes up but then doesn't do anything

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NEV


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Check on the Black/Yellow wire from CDI to P/V servo motor is connecting properly.

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GADGET


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That's exactly where it's pointing ,do u know how to do a continuity test ?

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acsp


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I know made continuity test.

Betwen cdi and power valve is everything ok.



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acsp


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The wires are ok.

who to check servo?

The servo make the self clean Power valve 5 times when the key is in position on.

When I start engine and increase rpm the PV donīt open.

Do you Know outher restrictions?

 



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acsp


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The servo made the self cleaning.

When i start the engine and open the throtle some times the servo open and closes very fast and then stop. With the rpm very high.

With the engine stop and without the cables i can rotate the servo.

Is possible the servo damage??????

Some help.

 

 



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AndyYam


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I beleive if the servo moves 5 times it may well be damaged. It should only move twice to reset its position to closed.

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