YPVS servo Rotates 270º

[Ckline]

Hi guys,cheers from Portugal,i Have a small(big) Problem,here it is! When I do key on , the motor rotates anticlockwise(dont do the clean test and stops at the 90° position (270° anticlockwise from top position) and shudders briefly in this position and just stops. Is this normal? With the cables on, the motor still only tries to turn anticlockwise making the right hand cable go tight and the left one slack, sometimes causing the left hand cable to pop off out of motor pulley. When the right cable goes tight the motor stops, then tries to turn anticlockwise again then just stops in this position.

[Ckline]

https://youtu.be/WuTAP7niG1o the same as mine.

[Calum]

I think he said his CDI went faulty!

I had something similar with my Zeeltronic, when that went bad.

[Ckline]

@Calum i dont think so you said that,not him,

CalumCalum 8 Jun 2019, 14:38
I had this when my CDI went faulty.

Jgb19830 13 Jun 2019, 20:56
@Calum disconnected the power for 30 seconds then reconnected... Think that's sorted it https://youtu.be/HNQbJ4AxNEU

gonna try that,but i dont think so hah

[Ckline]

PS: the youtube video i watched without sound.

[Calum]

Yes, thanks for searching haha!

[Ckline]

@Calum update cleaned the conections and ,opened and cleaned the Electronic in the servo, now the servo do a eratic movemente, like 4 times almost a clean test but only like 1 cm UP and down on the oposite side.

[Calum]

Your battery charged and not failing?

[Ckline]

yep full charged,i talked with a japonese guy that opens cdi and servos eletronics etc, he told me might be the potenciometer from the servo, if its broken the resistor( of potenciometer) the cdi send the right voltage but the potenciometer dont "translate" and the servo rotor dont know his right possition,Sems legit. Gona check it with the multimeter , it needs to make 0.93V to 2.37V !

[Ckline]

Btw its the white/red wire that delivers the voltage,

and today i will check evrething with another dtr from a friend,wish me luck!

[Calum]

Beyond my comprehension haha!

Keep us posted!

[Ckline]

Update¡! The servo is faulty, the cdi is ok, tried with another servo from another bike, but what gets faulty its the potenciometer, bahhh if you get one with the same specs Just need to weld it and done!

[Ckline]

@Calum done! Fixe the ypvs, resuming.. All the worng and default moves from the servo was cable/potenciometer problem, if you dont have one to sustitute, try clean and try all the continuity for all the cables from the servo, i had 1 bad cable{Black White} and a dirty potenciometer. Now evrething works fine.

[Calum]

Oh happy days.

Nice one bud, thanks for keeping us posted.