I recently moved, to Port Hardy BC, Canada, from Williams Lake, and when I started up my bike it wouldn't run right. It won't idle and when I give it some throttle it'll bogg out on me. I checked the spark and there wasn't a whole lot so I changed that, and it still isn't running right. It's a 1989 Yamaha yz125. I would appreciate any help anybody will give me. I also have email which is the same as my msn, it's Sp_232003@hotmail.com, which I'm on usually between 6 and 12:00 in the evening, or you can send me mail. Again, I will appreciate any help anybody can offer me.
hey was there a great change
hey was there a great change in elevation or temperature or anything like that from where you moved because if thats the case then your jetting is probaly way off. if it had been a long time since the bike was ridden was the fuel bad and are u sure u mixed it right if thats all good then its most likely your jetting and it sounds like a pilot jet
Yeah
Williams Lake was a really dry and hot place, and then I came here to Port Hardy and it was extremely humid, kinda tropical. No, my gas goes in it's own tank and the oil in another. My dad thinks it is just a carburator issue, another person thinks that I might have to rebuild the top end of my motor ie. piston, rings etc. And they also think the exhaust valve might need cleaning if the top end of the motor needs rebuilding, and lastly they think that my air filter needs to be cleaned with kerosene if it is dirty and after that is done I would need to massage foam filter oil into the filter then reinstall it.
ya with that big of a climate
ya with that big of a climate change your jetting is prob bad. jetting yur carb is extremely simple so u dont have much to worry bout. u can do it easily in half an hour
Update
My gas was extremely old, I mean extremely old ie. almost brown in color. So I changed the gas, checked the local shop for island carb settings and now I just have to clean the carb out very thoroughly, blow it out and adjust the idle and it should be in perfect order. Thanks tigmaster for your undetered help and in the future, if there's a problem, I know where to come. Quick question though, actually 2, in the carburator there were buildups of this yellow stuff where the float is, what is that? and finally there was also a build up of this kindof white stuff that would rub of very easily, it's an aluminum carb if that makes it easier.
The white stuff is a reaction
The white stuff is a reaction from the fuel and the aluminium. They don't mix well if left in contact for a long time, but drain the bowl and it's an easy fix. Climate change seems like a likely problem aswell but didn't you say you had a weak spark? Climate change won't affect that as far as I know.
Reply
Yeah, the weak spark was from the old spark plug that had been there since I had bought it, 3-4 years ago, so I put on a new one and it started up but it wouldn't run, and the rest is all above.
Update
And by the way, I just guessed as to what the bike actually was, I phoned around to people who had serviced it before and I found out that it is a 1983 DT100 Enduro
the yellow stuff is the resid
the yellow stuff is the residue left over from fuel that is allowed to dry up in the bowl. the best way to revent this is if yur not goin to be ridin yur bike the next day is to turn the fuel off an drain the bowl of gas. there should be a float drain screw on the bottom of the bowl. this will prevent that from ever happening again
Hey
OK thanks again!
I am near 80% sure its the cr
I am near 80% sure its the crankcase seal its a old bike defo might need a new one. I tought it was the jets too but it was not it was the crankcase seal.
dude yur obsessed with crankc
dude yur obsessed with crankcase seals. its not the crankcase seal so stop sayin it is. u have no idea wat the hell yur talkin bout so dont go sayin somethin random cuz u want to look like u kno wat yur talkin bout
stuntman00 i would not listen
stuntman00 i would not listen to him because im pretty sure he is just sayin stuff to look like he knows wat hes talkin bout but i definately kno wats goin on ive torn my entire bike and engine apart into every piece and have never been to a mechanic and never will
Well jettin is only a prob if
Well jettin is only a prob if you start messin with the jettin with stock jettin u should not have a prob with it. Thats what i think it is anyways and after all it is a old bike, if it was a new bike i would not be sayin crankcase seal. And things do wear on a bike you do know. A 17 year old bike now that could well be the crankcase. Everybody always thinks its the jettin at first but if you went messin around with ur jettin off ur bike more than likely it is the jettin. But im still stickin to my guns.
dude theres plenty of times u
dude theres plenty of times u need to change your jetting. almost every time u ride u theoretically need to re-jet. if u ride in the winter u definately need to re-jet from yur summer settings and if u get a new pipe or air filter u need to re-jet too. if u dont re-jet after u get a pipe then it was pointless in gettig the pipe if u dont use the power it has to offer. once again u shouldnt be afraid of doin stuff on yur bike and jetting is an important part of a 2 stroke
Hey
Ok, I just took the carb down to the shop, there was a bunck of junk in places it shouldn't be so their putting it in a bath over nite and blowing it out, and if that doesn't work, then I'm just going to keep tinkering.
Well if you really do ur jett
Well if you really do ur jettin after evertime u ride you really are a weirdo. Yeah if you found a load of gunk that was there it could be ur prob.
if your a man and ride a 2 st
if your a man and ride a 2 stroke then yur technically supposed to jet everytime you ride because of how much weather affects a 2 stroke i personally dont re-jet that often but i know when i need to re-jet and when i dont
make sure ur fuels just right
make sure ur fuels just right and ur spark is fine. if that doesnt work try rollin down a hill in nuetral pull the clutch in and shift down to first, i was in the forest once with my yz 125 my fuel was to lean so my friend went back to my camp and got a new spark plug for me we changed it out there and it still would not work so my step dad came out and took it up a prettty big hill put it in nuetral and then pulled in the clutch and hit first gear and he pulled the throttle all the way back and it started so u need a big hill and trust me pull that throttle as far back as u can. and if that doesnt work its gotta be a problem wit ur enginge or sometin
No
I think it's a problem with the carb. I already went down a big hill, and it would spark and everything but it wouldn't run, so I need to adjust the jetting some more and I need to adjust my throttle.
so does it start? if it does
so does it start? if it does what does it sound like and what color is the plug. your jetting shouldnt be that far off that your bike wont run even with as big of climate change as it went through it still should run
Yeah, no
It won't start, I have tried pouring gas into the head of the engine, I've held a lighter to the head and burnt all the gas out of it incase it was flooded, I have taken the carb down to the mechanic and have got the whole thing soaked in a cleaning bath, and then it was blown out and set to dry out. I have taken it apart and put it together more in the past week than I have taken it apart in the years that I have owned it, and it's extremely frustrating!
so are you sure it has a spar
so are you sure it has a spark and are u sure that its getting gas if you are then i would suggest a compression test the only things that can affect an engine are gas spark and compression so check em all out
I would also cheak the kill s
I would also cheak the kill switch cause they can sometimes be awfull trouble. You are way better of sending it away to get fixed you are prob doin more harm than good when you are taking it apart.
get a new bike i think that o
get a new bike i think that one has lost it after its a 1989 and if the people that had it before u didnt take care of it u know monthly inspections then u just might have to replace a lot of expensive parts and so it would be cheaper take less time if u just got a newer bike
hey i got a ? how much have u
hey i got a ? how much have u spent on that bike so far trying to get it fixed name the things uve cleaned and replaced and also tell me how much time uve spent trying to fix it. just curious, i thought that would be interesting to know so tell me
i would ignore what there say
i would ignore what there sayin sendin it in is stupid you can do the work yourself with no prob just any questions you have ask us and we will help u
INFO
Alright, I spent about 10.00 bucks on the plug, or whatever it was, and 6.00 on the carb cleaning and that is it so far, I think I should just take it in to a mechanic who knows what the hell he is doing, cause I sure as hell don't know what im doing, I adjust the jetting, I adjust the idle, and nothing workd, I have checked the spark, there is a whole lotta spark, I've checked the filter, and it's fine, I've checked the oil thinking that it's too old, and i put in new stuff. I've checked the pin and spring that screws into the carb for the throttle, and that seems to be fine. If I take it into a mechanic, he's going to tell me exactly three things, first he's going to tell me whats wrong, then he's going to tell me what parts I need, and lastly, he's going to tell me how much, and the offchance that nothing is wrong, he got it running and race ready, and all he wants is his hours pay for doing that. now you tell me, isn't that way the hell easier than friggin tinkering getting nowhere when all the while, this little almost insignificant piece is causing all the trouble and you've wasted the last x ammount of hours pulling your hair out, and if it was a broken part it's only going to cost like 20.00 bucks to replace? That guy talking about a monthly inspection for my dirtbike, he makes some pretty good friggin sense, he takes his bike in once a month the guy tells him how it's doing and what will go in the next year and how much it will cost. I've been working my ass off day shifts and night shifts, and someone who will take a look at my bike because I don't have the time and is going to tell me what it needs, sounds like a pretty good deal to me. Neways, I'm beat, I probably was rambling, sorry about that, it's past midnight now, im going to go get whatever sleep I can.
And Another Thing Before I Sign Off
I don't even know what questions to ask, I know the basics, but ask me to start getting into detail and I dont have a friggin clue
I agree with unbeatable racer
I agree with unbeatable racer if not that then just send it to the mechanic cause the longer you try fix it urself the longer its gona take ur mechanic to fix it from all the feckin around you have done with it. It dont matter if you cant fix ur own bike some ppl are just good at somethings and bad at others.
Yeah
That's exactly what I'm going to do, thanks for everyone's help, I'm deleting this post in the next 24 hours