Can't reach top speed

[erionmustafa]

@SpookDog i havent done anything to it but you or someone else in the forum told me that its not restricted it has a 3NC-00 CDI i think its the unrestricted one

[Calum]

Is it revving out 100km/h isn't brilliant, but then my DT doesn't do much more than that and that's fully tuned 170. It's just a question of gearing...

Are you sure the powervalve is operating correctly? Trying just pinning it open and riding like that.

[erionmustafa]

@Calum my rpm metter is broken but i will try to pin it open and do another run ,
the speedometter is broken also im measuring it with go pro hero 9 im not sure how accurate it is

[erionmustafa]

@erionmustafa i have a diamond shaped power valve can you tell me what is that for

[SpookDog]

@erionmustafa

There are different shaped ends, some diamonds, some oblong. Don’t make any difference…

You need your rev counter and speedo if you want to do any kind of comparison to what’s ‘normal’ for a given model.

100kph is getting near the 70mph top speed for a normal, restricted dtr125…

[erionmustafa]

@SpookDog i will get them fixed when i can but i don't think it is restricted

[erionmustafa]

@SpookDog but i have a square cap that i can put in 2 positions idk which way to put it to align it after

[Calum]

@erionmustafa Take the exhaust off and align the powervalve flush with the port. That's probably your problem...do that and it should rev off the clocks and be nippy...after 6k+ RPM.

[erionmustafa]

@Calum its perfectly aligned there but im thinking that the valve motor is not turning it all the way open

[HOTSHOT III]

@erionmustafa Take the pulley cover off, go for a ride and get it to operating temperature, then check PV operation with the bike running, it should do this:

https://www.youtube.com/watch?v=Wo_bI40UyWE&t=72s

Also you could try disconnecting the cables and pinning the valve temporarily like @Calum said to see if that makes a difference. I once cut down a 4mm drill bit to 35mm as a "get you home" in case of servo or PV cable issues, it's the right diameter and length to pin the valve via the pulley and alignment hole in the cylinder and can't move with the pulley cover fitted. Handy thing to have with you when out riding anyway.

[erionmustafa]

Thanks to all the help offered i solved the issue it was the cables not turning the valve the right way it was closing instead of oppening , tomorrow im gonna do a topspeed test thinking of hitting atleast 120-30 kmh