Can't reach top speed
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Just rebuilt it and cleaned the power valve mounted everything how it should be , but it doesn't go over 100kmh ,before the rebuild it barely did 80kmh . It's a 94 dtr 3mb engine
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That’s a 20kph bonus! You mustafa done something right
Jokes aside, I don’t remember your bikes history. Is it unrestricted or not?… -
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@erionmustafa i have a diamond shaped power valve can you tell me what is that for
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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…
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@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.
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@Calum its perfectly aligned there but im thinking that the valve motor is not turning it all the way open
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@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.
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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
and that's fully tuned 170. It's just a question of gearing...