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BoondocksUtah3

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About BoondocksUtah3

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    TT Newbie

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  • Location
    Utah
  1. I tried this post in the vintage forum, but have not received any responses beyond "you can find old stock carbs on ebay". I know. Not looking for an old carb, I am looking for someone who has put an aftermarket carb on this bike. Thanks, BoondocksUtah3
  2. Thanks, but mostly interested in anyone's experience with an aftermarket carb.
  3. My son has a 1987 YZ125. The bike runs pretty well, but the throttle slide is worn and loose inside the carb housing. This causes a rapid "fluttering" of the engine in mid-range when the slide is only partially up and can rattle. My searches have shown me that used slides are hard to come by. So........ what aftermarket carbs have folks put on this bike and what tuning issues did you encounter if any. We live at 6300' if it matters. Thanks ahead of time for any help. Eric
  4. All food for thought in the future. I have opted to go with a $260 rebuild to keep the bike stock. Thanks
  5. Thanks all. Will check them out....
  6. Hello all- Posted this in vintage but got no response, so here it is. My son has a 1987 YZ125 that just lost its rear shock--oil everywhere. Unless someone can point me to an aftermarket replacement or what other models are swapable, we are in for a rebuilld. I understand Race-Tech has parts for the rebuild and can do the work as well. Is there anyone else out there that also does this type of work? Thanks
  7. Hello all- My son has a 1987 YZ125 that just lost its rear shock--oil everywhere. Unless someone can point me to an aftermarket replacement or what other models are swapable, we are in for a rebuilld. I understand Race-Tech has parts for the rebuild and can do the work as well. Is there anyone else out there that also does this type of work? Thanks
  8. You Da Man! Just got back from a ride with the petcock in the reserve position. No problems, no stumbling, no stalls. Thanks a bunch! Eric
  9. I went for a ride yesterday after posting. Bike started fine. Did fine in first at low throttle getting off my property. It then died as I pulled out onto pavement and accelerated. I was going fast enough to bump start it, but it died immediately after starting. I stopped and restarted it and took off. It ran a little rough at first but then was fine for 2-3 minutes. Stopped at a stop sign and it stumbled again on acceleration but did not stall. Got it into fourth and opened the throttle almost fully open. It ran fine opened up, and on the rest of the trip. maybe 20 minutes or so it only stumbed twice more, and only on acceleration, and it never died. A few cranks on the throttle and it picked up and ran smooth. These are my thoughts--if its having trouble getting fuel how come it runs fine with the throttle open? Is the vacuum stronger on the diaphragm during acceleration? If so, and the diaphragm has a small leak that might explain why it runs okay when you are not asking it to accelerate? Thanks for your response Todd.
  10. Hi all- Have been through the archives but still need a bit of help trouble shooting this. Just bought the bike. It sat for 12 years. Drained and cleaned the fuel tank, then filled the tank and let the new gas drain through the carb for several minutes. Bike started right up, but would only idle with the choke halfway on, and might stall coming to a stop. Pulled and cleaned the carb (I couldn't get the pilot jet out so I just sprayed carb cleaner and air through it. Everything looked fine, but replaced what o-rings and gaskets I could. Replaced carb and bike now idled great with choke fully open. Now though the bike will hesitate and nearly die during accelleration, though not always. In a twenty minute ride with moderate amounts of shifting, it might do this four times. If when it happens I hold the clutch in and cycle the throttle, it will start running fine again and I can be on my way. Archive searches pin point the following: bad stand switch, bad run switch, loose CDI connectors, or air leak on one of the carb boots. What about bad gas? BoondocksUtah3