dave2292 Posted May 11, 2011 Posted May 11, 2011 Hello again, not sure if anyone remembers me but anyway my dt125r will not start, ive tried evrything that i can think off. the 3 main things the bike needs which are spark fuel and compression are there, it just will not start. what happened was, the bike was running absolutely fine. with the ypvs jammed open because the pulley was snapped so i had to wedge to pulley in a stiff position so it wouldnt move. i bought a new pulley and fitted it, reconnected the servo, switch igniiton on and the powervavle would not do that check thing where it makes a zip zip noise or whatever. okay so i kicked it over and revved it to 7k to see if it would start working which it did not (it also started making a wierd clicking noise). then the bike died. so i made sure the powervalve was in jammed open position and unconnected the servo, tried kick startin it and it wouldnt start and hasnt since. list of things ive tried not in order (maybe more just cant remember) 1.changed coil 2.changed spark plug 3.changed ht lead 4.changed fuel 5.cleaned carb 6.checked and cleaned reeds 7.checked stator,flywheel and all that crap/which is fine (maybe the timing is out, not sure, im not sure?) 8.checked piston and rings, which are fine basicaly the engine is fine, fuel is getting through, and it has a perfect strong spark. what else is there? any help would be appreciated, thank you.
paule230 Posted May 11, 2011 Posted May 11, 2011 Hello again, not sure if anyone remembers me but anyway my dt125r will not start, ive tried evrything that i can think off. the 3 main things the bike needs which are spark fuel and compression are there, it just will not start. what happened was, the bike was running absolutely fine. with the ypvs jammed open because the pulley was snapped so i had to wedge to pulley in a stiff position so it wouldnt move. i bought a new pulley and fitted it, reconnected the servo, switch igniiton on and the powervavle would not do that check thing where it makes a zip zip noise or whatever. okay so i kicked it over and revved it to 7k to see if it would start working which it did not (it also started making a wierd clicking noise). then the bike died. so i made sure the powervalve was in jammed open position and unconnected the servo, tried kick startin it and it wouldnt start and hasnt since. list of things ive tried not in order (maybe more just cant remember) 1.changed coil 2.changed spark plug 3.changed ht lead 4.changed fuel 5.cleaned carb 6.checked and cleaned reeds 7.checked stator,flywheel and all that crap/which is fine (maybe the timing is out, not sure, im not sure?) 8.checked piston and rings, which are fine basicaly the engine is fine, fuel is getting through, and it has a perfect strong spark. what else is there? any help would be appreciated, thank you. Have you fitted the valve correctly? Sounds like it may have been connected incorrectly the way you say the servo is no longer working.
dave2292 Posted May 11, 2011 Author Posted May 11, 2011 Have you fitted the valve correctly? Sounds like it may have been connected incorrectly the way you say the servo is no longer working. well ive never taken the actual valve out myself so im not sure whether it was fitted correctly, but im pretty sure the valve spins a full 360. ive just got it in the same position i had it before i started playing with it again. which is jammed open:)
Moderator Airhead Posted May 11, 2011 Moderator Posted May 11, 2011 Maybe the PV is jammed...gunged up! with the cables disconnected can you move the pulley by hand?
dave2292 Posted May 11, 2011 Author Posted May 11, 2011 Maybe the PV is jammed...gunged up! with the cables disconnected can you move the pulley by hand? yea the powervalve moves fine, im not really fussed witth it at at the moment, i only mentioned it because it was what i was doin when the bike died and never started after.
Moderator Airhead Posted May 11, 2011 Moderator Posted May 11, 2011 so it was actually running and then made a clicking noise??? take off the exhaust and see if you can see damage to the piston / rings
dave2292 Posted May 11, 2011 Author Posted May 11, 2011 so it was actually running and then made a clicking noise??? take off the exhaust and see if you can see damage to the piston / rings yea it was running fine, then i fitted the new pulley , re-connected the servo, PW wouldnt work , then started making a wierd clickin noise, a plastic kinda of clcik thought. ive allready checked the piston and rings, and there fine.
dave2292 Posted May 11, 2011 Author Posted May 11, 2011 can you do a compression test? aint got the tool but done the thumb thing, seems fine. and i feels the same amount of compression it had before it stopped working
Moderator Airhead Posted May 11, 2011 Moderator Posted May 11, 2011 i'm out of ideas If you have good compression and good fuel and a good spark I suggest you leave the plug out overnight to evaporate any fuel in there, then re-fit and if possible get a couple of people to give you a good shove to bump start it.
dave2292 Posted May 11, 2011 Author Posted May 11, 2011 i'm out of ideas If you have good compression and good fuel and a good spark I suggest you leave the plug out overnight to evaporate any fuel in there, then re-fit and if possible get a couple of people to give you a good shove to bump start it. thats what im like, ive done that too, left it overnight 3 nights in a row and done the same thing plus other stuff every day since haha. and ive tried bumping it to, just wont start haha
dave2292 Posted May 11, 2011 Author Posted May 11, 2011 Try a new plug. allready got a new one, mite get another new 1 but dont think it will make a difference
2 Wheels Posted May 12, 2011 Posted May 12, 2011 Power Valve could be rotated wrong and is now totally blocking the exhaust,,,,if so bike will never start Exhaust off and make sure you have the PV wedged in the open position. Where is his plastic clicking noise comming from ?
dave2292 Posted May 12, 2011 Author Posted May 12, 2011 Power Valve could be rotated wrong and is now totally blocking the exhaust,,,,if so bike will never start Exhaust off and make sure you have the PV wedged in the open position. Where is his plastic clicking noise comming from ? yea its wedged in open position, and im not quite sure where the clicking was coming from, i thought maybe it was the gears in the servo clicking? because the clicking only happened when i re-connected the servo and had the bike running.
Moderator Cynic Posted May 12, 2011 Moderator Posted May 12, 2011 yea its wedged in open position, and im not quite sure where the clicking was coming from, i thought maybe it was the gears in the servo clicking? because the clicking only happened when i re-connected the servo and had the bike running. Plasticy clicking was most likely the servo gears protesting. Have the pipe off to check everything is where it should be.
dave2292 Posted May 12, 2011 Author Posted May 12, 2011 Plasticy clicking was most likely the servo gears protesting. Have the pipe off to check everything is where it should be. ye ive dis-connectin the servo now anyway, and yea i have donde, its all in the rite position
paule230 Posted May 12, 2011 Posted May 12, 2011 Servo will make clicking noise if its not set up correctly and is trying to work, the valve shouls only turn about 1/4 turn. The fact that it only wont start since you've touched the ypvs def' points to that as a problem. Like someone has already mentioned it could be blocking the exhaust port completely. Do you have the instructions on how to set it up?
dave2292 Posted May 12, 2011 Author Posted May 12, 2011 Servo will make clicking noise if its not set up correctly and is trying to work, the valve shouls only turn about 1/4 turn. The fact that it only wont start since you've touched the ypvs def' points to that as a problem. Like someone has already mentioned it could be blocking the exhaust port completely. Do you have the instructions on how to set it up? i never set it up, it was set up before i bought the bike, i just disconected the wires on the servo. and reconnected them when i bought and fitted a new pulley.
2 Wheels Posted May 13, 2011 Posted May 13, 2011 PV can be put in 180deg the wrong way round,,,,,,,,,,yes you can spin it 360deg but it might be in back to front,,,,,if ya know what i mean,,,,,,,,Have a look and see ! So you had PV wedged fully open,,,,,bike ran fine Then you conected servo,,,,,,bike started clicking and stoped,,,,,,,hasnt started since ? Now you have servo disconected and PV wedged open again,,,,,,,,,bike wont start The only thing i can think of is,,,,,,,,the PV may have been all carboned up and sticking,,,,,,then you conected servo but it couldnt turn cause it might of been stuck,,,,,,,the extra load on the servo cause it couldnt turn might have blown something. At the back of the bike, below the seat left side, there is a little white conection box. Is this where the clicking is comming from ??? I forget what this box is called but if its clicking then it is goosed and the bike will not start. Stuck servo might of blown this box. What is happening now when you try to start her ??????? Ignition on,,,,give her a kick,,,,,,,,,,,,,then what ????? In Good Detail ! ! !
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