Bike lacks power

[Oisin]

Would a pinned powervalve create a loss in power and acceleration? Just wondering thanks

[Calum]

Depends where you pin it.

So it's not a clear cut answer.

On an unrestricted CDI a pinned powervalve would be detrimental to performance.

On a DTRE/X Ignition, a pinned valve will allow you to rev past 9K.
On a CDI where the ignition is severely retarded past 8K then it will be a loss of power all round.

If the CDI allows power up the higher revs, but, like the RE/X ignition, retards the powervalve, pinning it open will allow you to get that upper power, sacrificing low end.

It's not clear cut. For optimum performance, set it up properly and leave it alone.

[Darty]

Just on ride ability, I feel it’s slower over all with turning the PV off essentially,

That’s where a good expansion pipe really helps,

[Oisin]

@Calum yea I ok and how do u tell if the cdi is restricted? I have a DT 125r 2005

[Calum]

Well if the bike lacks power, that's usually a good indication that the bikes restricted.

[Oisin]

@Calum haha I get yea. And how would one unrestricted it

[Calum]

@Oisin You tried searching?

https://dt125r.co.uk/topic/578/derestricting-guide