DT125R FORUM

Forum patched and updated. Fixed some database corruption issues which was having a knock-on effect with emojis so hopefully they're working now.

Hey All! Due to personal circumstances I will be needing to suspend the DT125R Forum for an indeterminate amount of time. This is an advance notice to say that at some point, in the not to distant future, I will be switching off this forum. My intention is to relocate the forum/database hosting as the current situation is no longer economically viable. It is unclear at the moment as to what the future will be for this forum, but rest assured it will be back online in the fullness of time. I appreciate each and every one of you that contributes to this forum so there is a BIG thank you from me. Take care & keep smoking! Calum

Hi I always wanted to have wr200 or a Lanza very difficult to find and end up with dt200R. Your bike looking great.

Sorry, I think I didn't explain it well. The most times I tested for spark it was completely in factory condition. I tested each switch individually like two times and I checked all connections and replaced bad pins already. Then I just bypassed the interlock (only with the old CDI) as a last test to check if there is another issue since I didn't got any spark. I also checked the schematics like 10 times to understand the interlock. And it basically just pulls the blue yellow cable to the CDI to ground or open and it locks or unlocks the starter motor via relay depending the switch conditions. The zeeltronic manual mentions stop switch mode: high level stop. So grounding it should bypass all switches for sure. Regarding the mechanics I would also exclude that since it was running well and turned off like you hit the kill switch. Two more things I just remembered: I remember getting one or two times a single spark during all testing and if I remember correctly I was getting it in the moment when I released the starter button. So I thought maybe the starter motor or relay could cause issues like ground shift or something? And with the old CDI I got a really tiny spark when I removed the spark plug cap then holding the wire close to the engine block. It was barely visible and I couldn't get one longer than 0.5 - 1mm. That was also a reason I decided to buy the zeeltronic. But I didn't want to test this again with the new CDI since they say clearly to use a resistor cap to prevent EMC issues.

What specifically do you mean by cut? The Tachometer is mechanically driven on the DTR. So you need to replace the tachmeter cable back into the gearbox and the clocks. If you mean the lights etc, then there are many wiring diagrams already uploaded to this forum. Workshop manual is pinned: https://training.dt125r.co.uk/files/Yamaha_DT125_Workshop_Manual.pdf [image: 52172141696_84e3b69382_b.jpg]

It sems to have potential, even if I still have a bad carb, and PV and ignition are just based on butt dyno. Riding with a friend today I realized how slow his bike seemed, he was keeping up fairly well before, but now I felt like I was puttering around for him to keep up I have had a creeping feeling that maybe the reeds were damaged, and not the carb, so I pulled them out and checked them today, but they were fine. (VF4 clone for CR125 with DIY Polini 0.35mm petals). Can't wait to try another carb on it, feels like I have done a million mods and adjustments on that POS carb by now.. I was not so familiar with the PWK's before, but by now I know them in and out BTW, temp was perfect during the ride.

Also don't forget to change bulb in light cluster for an led Kind regards