marko727

I don't really know how should powervalve be positioned. Could it be that the powervalve wont let my revs go past 7000 rpm?

Hello there. I don't know what else to do so I'm posting here to get some help. I bought a Yamaha DT125R, 2001 version. Everything seems to be really okay, except it wont rev over 7000 rpm with third or more gear. First two gears go into red area of rev meter. It sometimes revs over 7000 rpm when standing still in neutral, but then falls back to exactly 7000 rpm. Some of my electrics did not work, like the horn and blinkers, so I removed the light to see what's going on. I think the previous owner made a mess there, but got them working again. I read something about a "reed switch" which restricts rpm-s to go over 7000 rpm (?). I opened the speedo and saw it had a cut wire going into it (white with a black stripe) and there was a switch mounted between that wire (wire itself headed into speedo with other 3 wires, but only 2 wires went into light bulb of speedo, the other 2, including the cut one, went to white and oblong plastic thingy which had a glass cover on it and two little pinchcocks in it). I removed the mounted switch (not the reed switch ?) as it was doing literally nothing. But then I found out I must not cut the reed switch wire (if it is that wire?) and went desperate because it was already cut. What can I do to remove that RPM restriction? I should say my speedometer cable is broken, ordered a new one from a local Yamaha dealer (that can't be the problem, right?). I cleaned the carb, cleaned the air filter and put some special air filter oil in it, changed all the oils and the problem remained so I'm guessing it's electrically restricted. Any kind of help is REALLY appreciated! Thanks!