DT125R FORUM

Might be looking at a dtr 1999, but it failed its mot and 1 of the reasons are "Front Brake component is fractured Caliper slider boss" Just wondering what this means, does it mean it needs a new caliper?.. TIA

Iv'e recently bought reeds online and the listing clearly said dt 125 lc mk3 reeds, but when they turned up i took my old ones out to find out that mine have 2 petals and the ones that I got sent have 3, so i suspect they're actually for a dtr not an lc, if i bought a dtr reed block would they fit in my bike?

@jens-eskildsen I found a video on YouTube of the same bike doing the same problem and in the video he unplugs a green connector coming from the cdi unit and it sorts its self out so it went to my bike it ran like shit unplugged this green connector and it runs fine, I was watching a cdi replacement video from carmo electronics and when he was putting the new cdi in they left the green connector disconnected so I'm not sure what it's meant to do

I've now uploaded the videos on YouTube links in the original post

@calum definitely no kink in fuel line, we've defiantly messed about with the float to see if that made any difference and I think my dad set it correctly, in the videos we took the filter off cause we were constantly taking the carb off but when I test rode it we put it all back on, we set the plug gap and after I filled it up turned the fuel tap on the on position instead of reserve and that defiantly made it last much longef but it still ends up doing the same thing

@calum yeah we have the manual, the carbs all set correctly, we drained the fuel and put fresh fuel in it and I managed to ride it to the petrol station and fill it up so its not bad fuel

4 months ago me and my dad bought a 1987 DT 125 lc ypvs, really nice condition, well looked after and very original, we cleaned it up got it running and it was all good, since then it's been sitting in my shed waiting for my 17th birthday, I'd taken it up the road before but it had never really been properly ridden since we owned it, the bike runs perfectly when it's been sitting for a while and it's cold but it seems that after about 2km of riding it bogs down, afterfires and dies and we can never seem to get it running properly (I have a video of it doing this and of it running how it should) we've cleaned the carb countless amounts of times changed the plug, swapped the coil there's defiantly fuel getting to the carb, we have a receipt for an engine rebuild, before we bought it, by a respected bike mechanic in my area from a couple years ago and the bikes not done many miles since then so I wouldn't like to think it's anything internal such as the rings or seals, when the bike runs as it should it feels amazing, its got good acceleration, it starts 1st kick and it's really smooth, the only thing I can think of is the cdi but I don't know much about what they do and how to test them, its got a strong blue spark that has a solid tick sound when it does.

This is when it boggs and after fires
this is when it runs