jdunnihoo

Thanks for all the help. Will still see hwat I can do about trying to get the slide free, but if anyone has a part number or model number for the Mikuni, I will pick one up. Thanks everyone Jarrod

Update: Could not get at it. Stuck and is seriously wrenched in there. Would say that the previous owner had forced it, realized it and sold it. No worries. Cut throttle cable. Spring and needle fine. Slide is jammed in the old carb and I can't find an effective way to remove it. Does anyone know the part number or where to order a new carb? Will order a new cable and carb. If slide is seperate from the carb, does anyone know a part number? This will be the easiest way to do it. Looks like the previous owner really wrenched on that carb some. Jarrod

I have a pic if it will help. Thanks for some advice, as it looks so stuck that I was going to cut it out and replace everything from scratch. Not wanting to be so drastic, but with the spring and cable still attached it's a bit of a pecker, for sure. Will start the saturation and gentle tapping now

Thanks. Yes, water cooled version. This bike only existed for 2 years in the USA in a water cooled version. At least from what I can tell here and there. I will see if I can't find something to plug the hoses and remove the carb. I'm not new to two strokes, mostly lawn and garden equipment and outboard motors. Can't recall something so picky about an air leak, but this seems solid and as mentioned spraying WD40 on seals has not helped any. Will post when done.

Also should note that I tried to spray WD40 into as many "leaky spots" as I could find and no change. Will post more as I can Jarrod

Thanks for help everyone. Took the top of the carb off, where throttle enters carb. Looks like the slide is stuck and I can't force it... not trying to anyway so I don't ruin it. Would remove carb, but since these are rare in the USA, I am unfamiliar with a carb that looks like the coolant flows through it. If I am interpreting it correctly, the coolant actually gets pumped through the carb before entering the block. Is that correct? If so, why? Can I remove the carb without dumping all my coolant?

Update #3: Still same spot. I feel like a broken record here, but since NO ONE has replied to ANY help posting of mine, I will try one last time before considering this forum useless. Since I have to start buying parts on a whim, please let me know best options: 1. Throttle spring 2. Carb slide 3. Throttle cable I know this forum doesn't share copyrighted works, but if anyone has a carb diagram or instructions on how to change the throttle cable, that would be brilliant. Bike runs at full throttle regardless of twist grip position. You can hear cable moving parts when grip twisted. Twist grip doesn't return on its own. Even if you don't know what is wrong, even if you have an idea, please post something. This has to be the most impersonal, non-helpful forum I have ever joined. No offense, but I can't recall joining any forum and posting an issue where someone didn't offer at least something. Thanks again, Jarrod

Hello all, First Yamaha for this guy. Bought neighbors DT50 for my young one to learn how to ride/shift. Kicks over and starts/runs fine. Instantly goes to full throttle. Also, tach doesn't work and has a a couple broken lenses/stalks for signals. Are these easy to still purchase? Are any of these easy fixes? It is still using the Autolube system, which is working. Should I keep using it or bypass for premix. All of my other smokers are vintage and use oil injection, but are all Suzuki. Is the Yamaha system as reliable? Other than that, the bike is in solid original condition with only 1411 US miles on it. What else can anyone share on the older DT bikes? Has a DG pipe replacing the stick pipe. Not sure if carb mods were done, but looks like this pipe has been ridden on for a while, so not too worried about running lean. Thanks all, Jarrod

Update #2. I ended up lubricating the throttle cable and no such luck. I still can't get the throttle to return to "home position". It will move and you can hear the mechanism working inside the carb, but it pretty much runs as if you have the throttle wide open, regardless of grip position. Throttle cable seems ok visually, but I may question the spring. I originally asked for manual pages, but it appears that is prohibited on this forum, which is really odd. In fact, a lot about this forum is not in-line with my BMW and Suzuki forums. Not even close. In any case, I seem to be getting some views on my thread, but if anyone has an idea, that would be greatly appreciated. Symptom: Bike starts and after a couple seconds it revs up to full throttle, regardless of twist grip position. Twist grip also doesn't return to default location. Related? Ideas? Third day messing with it and getting nowhere. I hate to take to a garage as I am sure the fix will not be too hard... if I knew what it would be. Thanks for anything that helps me out. Take care, Jarrod

Thanks for the welcome and vote of confidence. Sadly, as I play with it for the third straight day, I seem to be getting nowhere

Thanks mate! With luck, I hope to have this thing running right over the long holiday weekend

Hello all, First time Yamaha owner. I had already posted a topic in the help/repair forums, but was told by another member that it might help to say "hello" first. Name's Jarrod. I love the vintage Endurop bikes. I have an older Suzuki and a KE100. Something about the older bike gometry that I am fond of. I recently picked up a 1988 DT50 for some youngins in my family to learn to shift on. If anyone has any tips, help, two cents, comments from the peanut gallery, or any other advice from sages of old... feel free to pass them on. And if you know about DT50 throttles... check out my other thread Thanks all and take care, Jarrod

Update: Ended up picking the bike up anyway. The grip deffinitely won't return to starting position. Easy way to get into it? Have any repair manual pages to send over? Thanks for any help all,

Hello all, Guy down the street is selling a 1988 DT50. It's in good order. Everything works (lights, etc.). Starts on 1-2 kicks when cold but immediately goes to WOT within no time. He says he has had the carb off a couple times to try and "fix" it. If you mess with the "twist grip" portion of the throttle, it never seems to return to it's correct location. I didn't mess with it too much, but noticed the coolant lines go into the carb and then from carb into block, so didn't want to tear into it if I ddin't need to. If you can shift fast enough, it actually runs. Thought I would pick it up for a couple younger first time riders in the household. Thoughts or ideas? Jay