dtr_125

Right got the bike stripped down. Its a yamaha dtr125 1994 model with powervalve. but wont fire up, its got fuel in and theres a spark but heres the problem. Theres a spark when the ignition is not on but stops when ignition is live. So ignitions on and all lights, temp guage and powervalve works but theres no spark, then cut the ignition and theres a spark and it fires up for afew secs then dies again. Had this problem before it got stolen where the spark would sometimes stop and to start it you had to flick the ignition on while kicking it over. Could this be something simple ignition coil? or would a whole rewiring be needed? Also the nuetral light stopped working jsut before it was stolen which im sure is something inside the generator or gearbox that is causing this? That can be solved later but atm i need help on the sparking issue to get it running propely??

do they sell Xenon Bulbs for the dtr125, or what code is the normal H7, H4 ect??

i doubt it will be this but if you have had to redo the wiring there maybe a problem with the ignition mine was the same, i have to kick it and turn the key to the "on" at the same time as kicking and it fires up firse time but if i dont theres a spark ect but wont fire.

hi got it sorted now i took the generator cover off to change the sprocket and just thought id give the wires a wiggle and they started workin again so put abit WD40 to clean out any moister and done the trick.

cheers nice one i just didnt want to have to get a new gasket and stuff if it had fluids in ill go give it a go now

ye but wouldnt you have to drain any fluids like on the other side theres the gearbox oil, wasted to know if you could take the sprocket off without taking the cover off if i would have to drain anything, and the chain if jammed between the sprocket and the swingarm

hi there i have took the back wheel off to change the tyre but as the bikes been stode for afew weeks now i thought id start it just to give it a run but i forgot to put it in nuetral as the light do'nt work and whn it i kicked it over the the sprocket turned and got the chain stuck, is it easy to get the front sprocket off without taking the left side engine casing off as i dont really want to drain any fluidsg unless theres a easier way??

very long time since last replybut i onlylive 10 miles away so usually go up there 1-2 a week might hav seen ya jsut dont know it lol

awhile back i had a problem with all the electrics as the back indicator had been smashed so didnt work then everything stopped working, discovered that all the wires under the seat had melted together( shorted out from indicator i think) so after hours and many lenths of wire fixed all the wires so everything works fine now, horn, alarm, lights ect. the problem now is the neutral light and oil light dont work anymore, iv looked at all the rest of the wires under the seat and headlight but there all fine, could it be anything to do with a relay or something, or whatever detects its in neutral from the gearbox? thanks 4 anyhelp in advance

long time since last post but thanks for help, i took top end off and piston rings were nackered so changed them and polished all the carbon off the head and piston and also put a 17 teeth sprocket on front and now it is better then its ever been will reach 70-75 and will go off the clock downhills not even red lineing no problem. before it wouldnt hit 55 even downhills then would cut out (rings i think loosing the compression) just run it in and is sweet as a nut thanks

i had same problem but i jsut waved a magnet infront of it and its been fine ever since

this is because when the engine is on tickover the lights are powered by the battery but when you rev more power is going thought the battery to charge it so the lights get slighly more power, totally normal but cant help with the manula sorry

im wnating to get sum yz upsidedown folks for my dtr but i wanteed to know how the speedo drive conectedtothe wheel. whould this fit a yz 426 rim?

i have a dep rear pipe and am gona buy a front pipe in next few few weeks but want to know where can get jets from at the same time, i looked on net but cant find em and also wht wht size ill need ti upgrade from standard

i have cleaned out the exhausts and also cleaned the spark plug and set the oil pump as it was giving to much oil thought and the accelaration has improved but top end still at around 58-60 then as soon as it hits 60 the revs just bog and die, i tryed lookin up the exhaust port to see how the powervalve was set but couldnt see it, the pistion seemed really shiney on the surface didnt look clogged, how can you tell is it is coked or not? cheers

i rang a yamaha dealership colin appleyard and they said it may be a faulty ignition barrel so ill have to take mine off and see what the connectors are like as im not sure what year the barrel is as the ones iv looked at have different connectors for different years

i dont usually abuse it only got it to 80 twice to c whts it could do usually stay around 65 but its been built from different years so the clocks say 6000miles but engine might have done alot more, im not very mecanically minded is a rebuild sumert you can do yourself or best in the shop?

dtr125 with a dep silencer, when i got it last october up till the topic about starting problems last month it would do around 70 easily and at a push 80,but since then when it hits 60 the revs jsut stop even downhill with the wind wont go above 60 and thts in 5th still dosnt go faster in 6th jsut lower revs ne1 hav any ideas? cheers

there is a spark when the ignition is off but then when the ignition is turned on the spark goes thn come bk when turned back off, but to start u gota turn the key as u kick and it will start and stay running but if i turn it off with the key and leave it for 10 seconds it wont start and u gota turn kill switch to off thn kick the started 1'ce thn tunr kill switch back on thne kick and turn key and it will start and since then the indicators have stoped workin do you think this is related and more importantly any help with it, owt at all, any ideas jsut say cheers

the same thing happened again so took the carb off again and the bottom was filled with blue coolent again then notice the carb has a crack in it so the coolent has been leaking into the bottom of the carb so a new carb required

does any1 know what the best exhaust is for top end out of the following DEP Big One Gianelli Nikkon look at pics and info on .. http://www.dtr125.net/tuningpartsf.htm

i know these are very hard to find i couldnt find a second hand oneandhad 2 buy brand new which cost nearly £160 so hers a real bargain if anyone is lookingfor 1 http://cgi.ebay.co.uk/dt125r-servo-power-v...1QQcmdZViewItem

i took the carb apart and the bottom was filled with blue water, i dont know much about bikes so not sure how or what its from but it runs brillient now, at a guess id say it was 2 stroke oil as thats blue but not like water so must have got water in the carb somehow but thax 4 the help people

with the front dep pipes been chrome are they known/bad for rusting easliy with mud and water ect directly from the front wheel??

so it is lol cheers