triggs Posted September 20, 2010 Posted September 20, 2010 Hi all, my son has a DT50 MX 1986 model. after he has been driving for around 2 miles his engine starts to cut out. If he drops the revs for a couple of mins it runs ok again. Im stuck for answers, has anyone got ant ideas. PLEASE. Cheers Dave.
Moderator Airhead Posted September 20, 2010 Moderator Posted September 20, 2010 Could be a dirty fuel tap strainer, or it may even have a strainer inside the tank, bu look at the bowl one first. Also check the tank cap vent is clear. ...Paul
triggs Posted September 21, 2010 Author Posted September 21, 2010 I have recently replaced the bore and piston. And it was happening before I replaced it. It jerks and stutters then restarts and is ok for a couple of miles. It happens when the engine is both warm and cold, also when it is ridden gently. When it cuts out, Its almost like its running out of fuel. Dont know about when the clucth is pulled in, I will get him to try it. It has a standard exhaust and air filter
Moderator Airhead Posted September 21, 2010 Moderator Posted September 21, 2010 Hmm Dave you dont seemed to have adressed my post in any way? Remove the fuel pipe from the carb spigot, open the tap and run the fuel into something is there a good flow?
triggs Posted September 21, 2010 Author Posted September 21, 2010 Sorry about that. I took the fuel pipe off turned on the tap and the flow was good, do you think it could be dirt moving around in the tank?
Moderator Airhead Posted September 21, 2010 Moderator Posted September 21, 2010 Sorry about that. I took the fuel pipe off turned on the tap and the flow was good, do you think it could be dirt moving around in the tank? could be water in the tank and hence in the carb float bowl, try draining the float bowl.
triggs Posted September 21, 2010 Author Posted September 21, 2010 could be water in the tank and hence in the carb float bowl, try draining the float bowl. Ho Paul, I tried that one already, its got me quite stumped, i will drain the tank incase there is dirt in there, cant do it tomorrow afternoon, I will let you know what happens.
triggs Posted September 22, 2010 Author Posted September 22, 2010 Hi all, Thanks for your suggestions so far. Got the tank and carb clean now, took for a test drive and it still cuts out after about a mile, tried putting the choke on it made no difference also tried taking the petrol cap off, again no difference. When I pulled the clutch in it ticked over ok. When driving it starts a bit sluggish in every gear and all of a sudden takes off then like i say after a mile stutters and splutters and dies off, if you pull over for 30 secs she goes well again for a short period. He did run out of 2 stroke that is why I replaced the bore, However, I did bleed the 2 stroke. All the earths are good. Now im all out of options
triggs Posted September 24, 2010 Author Posted September 24, 2010 Thanks for all your help. I gave up and took it to the garage. I will post what was wrong when I find out. Thanks again Dave.
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