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

@Yaya97422 Vert/noir

Hi Strike, sometimes the O ring on the float valve seat can leak ... maybe check this.

Ok long speech coming. Have purchased 2002 dtr as non runner po said it cut out and wouldnt start again. Ripped it apart had frame swingarm powder coated fitted new yamaha piston and rings small end bearing after slight hone was no play on conrod so left the bottom end alone found the spark plug that was fitted didn't spark before strip down. Have new rad and pipes powervalve rebuild kit fitted. All new cables throttle clutch powervalve speedo tachometer. Full rebuild kit for carb with stock jets and set to stock settings. I cleaned all plugs and electric connections led indicators and rear stop tail light fitted (indicators don't work correctly flashing like hazards not turn signals waiting for resistors and led dash bulb) reed switch is taped up and pushed underneath the light housing. 2002 reg but think frame is 2000 (could be wrong) barrel/cylinder is 3mb 56.4mm piston kit installed was same as removed. Top hat is not yamaha branded but 3bn and is same as 3mb no squish restriction band. Cdi is 3rm 30 1xv powervalve is setup using Allen key in hole and viewing exhaust port. Pre mix was 150ml in 5litres shell vpower fuel. Pump was bled off im using yamalube 2stroke semi synthetic in pre mix and oil tank bolted infront of the fuel tank right hand side. Once running will run off the 5litres of premix then pure fuel into tank as it was just to ensure lubrication on start up with new piston. Bike can't move from the spot it's in for a couple months now so have time to get this sorted but can only run it on the bike stand im using. It starts with the stand down or up has new motobatt battery. The little white relay under seat next to coolant expansion tank is buzzing away when running think thatll need replaced. The oil light is illuminated and stays on when ive had it running. Went off when selected 1st gear. Long arse explanation but thought give as much info as I can. Bike will eventually kick over and fire with choke on I had to screw in all the way the throttle stop screw (idle adjuster?) To keep it running with choke off. Soon as touched throttle it died and cut off. Been adjusting both fuel screw and idle but it just won't idle correct rev up basically run correct anything I do. I've removed jets again today cleaned with last of brake cleaner and compressed air line. Going to get brake cleaner tommorow check for air leaks around inlet rubber and airbox rubber ( but that's before the carb so shouldn't make any difference and it's siliconed) the seal behind flywheel. It has new br9 plug no thermostat fitted but have genuine 1 ready to be fitted gaskets are genuine yam. New seals on kickstart sprocket clutch arm gear selector shaft Apart from this im lost. Any help greatly needed. Please help. Tia

Fingers crossed it sorts it out for you

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