DT125R FORUM

@NINJA thank you mate I will give that a go tomorrow, I have been through the carb, checked the reed valves and cleaned everything out with brake cleaner then the air line. I found a bare wire that had been nipped exposing copper. It was one of 2 wires coming from the coil, I thought I'd found the problem until I finished and quickly learned on my way home that there's no difference atall, nits so confusing as a few days ago I was on it and downhill it was fine, it was actually screaming how it should, but I have tried it downhill since then with no luck and a max rpm of about 6-7000rpm

@NINJA ahright thanks mate, I will double check the compression now because I'm not 100% certain on those figures, but thank you for your help mate, I now have some ideas of where to start looking

@NINJA thanks mate, I will go through everything on the list, but my bike did have a full engine rebuild just before I bought it, and since then it's had 1 piston, then it overheated due to a broken thermostat which warped the head, so the head got skimmed and a new piston fitted while it was in bits. So I believe the engine to be in ahright nick, even so I did do a compression test last week and come back between 90 and 100? If this was a car I would be worried but I believe it should be around this figure I just couldn't find an exact figure

@d3cme pretty sure my bike doesn't have any electronic limiters left on it, as it has been de-restricted for atleast a year and has only started to play up about a month ago. I have my powervalve turned and stuck open yet the bike has no power atall and really struggles to pull me on the flat nevermind up hill. It will rev the clock noproblem in neutral but once riding, it splutters and coughs at around 6000rpm to 6500rpm then it pulls well up until around 7000rpm then splutters like it's bouncing off a limiter, this really has my head baffled, I'm a mechanic, I work on cars day in day out but I just can not find a single thing wrong with this bike

@NINJA my bike has only just started doing what it's doing, I removed the limiter atleast a year ago and it's just started spluttering about a month ago, I was out on it yesterday and downhill i managed to get the bike to rev to 9or10 thousand, which it has never done for atleast a month now so this is leading me to believe it's something stupid restricting the power and rev's

@NINJA what do you mean mate? The cdi is my problem?

@Calum is the reed switch the little white block inside the speedo clocks? If so that's wrapped up inside the speedo unit, my bike has a full dep pipe. But you mentioned cdi unit, do you think this could be my problem?

@NINJA thanks mate, I have had the bike in bits once again, I've been through the wiring the lot and as far as I can tell it all looks good, the little white block thing is popped out and wrapped up but still tucked inside the speedo unit, so this is leading me to think the fault lies elsewhere

@NINJA what video? I have tried a few on YouTube. I

@NINJA thanks

@Calum I have yes, all I need to know is how to electronicly de-restrict my 2002 plate dt125r it's doesn't quite say on there, my bike has about 6 wires coming from the back of the speedo

@Minia thanks alot mate, I will have a good look. Much appreciated

My bike revs fine in neutral but when riding it's really slow, I have power valve constantly open, it's slow to 6500 rpm then splutters up to 7000rpm, then pulls well until 7500 then splutters like mad, any help would be appreciated as I am out of ideas

@declan is it green and black nomatter what year or model?