Post by: Stusmoke on July 04, 2012, 12:35:22 PM
Now after replacing the head gasket and base gasket on my 2001 honda CR125r, it is now urinating fuel out of the carby overflow valve. Atleast I believe it to be an overflow valve. I never even touched hte carby when doing my work its just completely random it wasn't doing this before. I'm getting the feeling its cos its not going to the cylinder. THe engine wont start either hence my inference of not reaching the cylinder.
Thanks for any help guys. Its gonna be something so stupidly simple that slipped my mind.
it was definitely NOT doing this before
Post by: msmola2002 on July 04, 2012, 01:16:48 PM
give it a sharp hit and see if it stops, if not pull the bowl and make sure there is nothibg in the seat, or the rubber tip f theneedle is in good shape
Post by: Stusmoke on July 04, 2012, 02:29:00 PM
Post by: Stusmoke on July 05, 2012, 04:08:01 AM
So its gotta be something in the fuel system somewhere. I'd rather hear some suggestions before I go tearing the carby apart though
Thanks everyone I appreciate the help
Post by: TMKIWI on July 05, 2012, 08:15:14 AM
It is good practice to clean the carby after every rebuild.
Post by: Stusmoke on July 05, 2012, 08:55:25 AM
Strip the carby.
It is good practice to clean the carby after every rebuild.
I did a basic teardown of the carb today but something else is that the genius who had the bike before proooobably never cleaned the air filter in the filters life. So I washed that today. But it also wasn't pushed down properly and the intake was a little exposed so its a safe bet somethings gotten clogged. Anyway I've got my detailed manual and a fair bit of spare time so tomorrow is carby teardown. Should be fun
Post by: Stusmoke on July 09, 2012, 07:59:32 AM
Well I cleaned the begeezus out of the carby, everything was all sweet there no need to replace anything. It was relatively clean too. I also uncovered the source of that scratching sound I mentioned when you twist the throttle? The spring collar was stuck down around where the throttle cable hooks up and wasn't inside the spring anymore.
To the issue at hand: Backfired.
Its getting fuel at least, so thats a level up for me but when I installed a new spark plug yesterday in an effort to solve what I thought was a lack of spark issue, it backfired on me. Atleast I assume the loud CRACK noise that it made that almost made me shat my pants and fall off the bike was backfiring.
So whats the thoughts fellas? Incorrectly timed Ignition?
Post by: cnrcpla on July 09, 2012, 03:28:27 PM
Post by: 2T Institute on July 09, 2012, 10:38:07 PM
Post by: Stusmoke on July 10, 2012, 11:01:27 AM
When I was taking the cylinder off, I noticed the line from the ignition coil/stop switch was a little exposed in that it didn't have rubber insulation around it. So with that in mind, I remembered a few things that seemed insignificant at the time. First, I got my cousin to hold to spark plug by the rubber pieces out of the way of the cylinder head to guard against the fumes igniting. The first spark and he jolted something chronic. It must've been a pretty serious whack. The next ones after that were extremely weak and barely noticeable even when holding the sparkplug itself. When I checked it today, there was no spark whatsoever.
With this in mind, is it possible that either the ignition coil itself is dodgey and having intermittent faults or could it be that the wiring attachments are loose?
Thanks guys, I appreciate taking the time to help me out.
Post by: nom de guerre on July 10, 2012, 12:20:13 PM
Post by: Stusmoke on July 11, 2012, 08:50:02 AM
I've checked everything: exhaust valve mechanism, carby everything that could've POSSIBLY gone wrong while I was taking the cylinder off. I didn't touch anything else and it was definitely working fine before.
What could've possibly gone wrong in the time that I was doing my stuff? It must be something brutally simple that I've missed.
Post by: Stusmoke on July 13, 2012, 02:02:10 AM
Anyone got any ideas?
Post by: msmola2002 on July 13, 2012, 03:17:36 AM
So, if you have spark then - there are only 2 possible explanations.
1) Fuel (or lack thereof)
2) Timing of spark.
To rule out 1), invest in can of aerostart/start ya bastard/ether in a can. Spray liberally, kick. If it does not at least pop or something, 2) is looking to be a good option. If it pops and farts and bangs and sounds vaguely like running, you have a fuel issue.
For number 2
Quote
Buy timing light, dial gauge and spark plug adaptor report back when you have those.- This guy, he knows. The proper way to troubleshoot an issue like that is proper tools! Find TDC and go from there.
Post by: 2T Institute on July 13, 2012, 12:12:26 PM
*bump*
Anyone got any ideas?
having the plug ungrounded and kicking the engine over is great way to find out how much 'smoke' is contained in the CDI box.
Post by: SachsGS on July 13, 2012, 03:02:16 PM
Be very careful when using ether around 2Ts.The ether will sometimes ignite in your crankcase and blow out the crank seals.
Post by: Stusmoke on July 14, 2012, 02:03:19 AM
I looked at the ignition coil and its terribly rusted on the exterior. After I scratched away at it for about 10 minutes it still was getting very weak spark. I remember seeing some rust on other inconspicuous places on the bike too that shouldn't really be there. So my guess is the bike got completely sunk at some stage and thats why he rebuilt the engine from the ground up. Anyway my point is if the coil is as rusted as it was on the outside whats it gonna look on the inside?
But I'm no expert so I'd like to know: If it sometimes sparks and sometimes doesn't even though its grounded, getting very weak spark when it does spark and sometimes giving a massive jolt, is the ignition coil to blame, or the spark plug wire? possibly both? I also checked the ICM and none of the prongs were dodgey. I checked all the wires along the connections too everything looks fine. Just an intermittent fault somewhere along the line.
Post by: 2T Institute on July 14, 2012, 05:54:59 AM
Post by: Stusmoke on July 15, 2012, 07:38:01 AM
Post by: msmola2002 on July 15, 2012, 08:55:30 AM
http://www.jaycar.com.au/productView.asp?ID=QM1500
Post by: scotty dog on July 15, 2012, 12:55:02 PM
Post by: Stusmoke on July 16, 2012, 09:05:40 AM
100? bollocks.
http://www.jaycar.com.au/productView.asp?ID=QM1500
I stand corrected. I just did a quick google search and the cheapest one was $125. Alright I'll pick one up tomorrow I guess and see what the spark plugs doing. Thanks
Yea I paid about $20 for my multimeter, have fun Stu, sounds like fun not
Yeah I'm so psyched
Post by: 2T Institute on July 17, 2012, 01:50:45 PM
Post by: ford832 on July 18, 2012, 01:57:03 AM
Don't have one, and I'm looking at 100 minimum to buy one. No point really, I'd rather just take it to a mechanic. Before I do, any other way of testing?
It may not help.Speaking as a mechanic,my $700 meter decided to commit electronical suicide today so it wouldn't have helped to bring it to me
Get the best you can afford.Accuracy is everything.
Post by: Stusmoke on July 18, 2012, 08:41:07 AM
Don't have one, and I'm looking at 100 minimum to buy one. No point really, I'd rather just take it to a mechanic. Before I do, any other way of testing?
It may not help.Speaking as a mechanic,my $700 meter decided to commit electronical suicide today so it wouldn't have helped to bring it to me
Get the best you can afford.Accuracy is everything.
Managed to snag one for $15 bucks accurate to a .5%. Personal opinion? POS. But its expensive considering I'm only going to use it once.
now that I've got it, how do I use it? Its got a whole heap of symbols I recognize from last years physics but can't properly remember cos I was really caught up in the not paying attention thing.
Some advice would be great, thanks guys.
Ford, love the avatar
Post by: SachsGS on July 18, 2012, 04:38:22 PM
Post by: msmola2002 on July 18, 2012, 11:15:13 PM
You can never have too many tools.There is nothing worse then not being able to do something because because the correct tool is not available.
Agreed, I never ever begrudge spending money on tools.
Yeah sure I get the immediate buyers' remorse and self loathing and hatred for spending money (cos I am an uber tightarse) but after a little while it goes away and dammit, I am happy with my shiny blingy tools
Post by: Stusmoke on July 19, 2012, 07:55:34 AM
Do you want to fix the bike or just think of reasons why you can't do things ?
Do you want to help me out or just be a pain in the neck? Seriously if you're not here to offer advice, go away. It's pretty simple. I am actually doing year 12 at the moment so I don't have alot of time on my hands. And oh yeah... Theres that bit about me not knowing what I'm doing and would rather take the time to be certain than fry my whole ignition system.
You can never have too many tools.There is nothing worse then not being able to do something because the correct tool is not available.
You have no idea how many times I've seen a bolt that needs a big ass driver piece and gotten annoyed. Damn its frustrating
But I'm trying to keep the budget as low as possible. Hell if I had the money at my finger tips I'd go on a badass shopping spree and get a whole workshop setup. But its not a possiblity at the moment. Folks will retire in a few years and need to save money. I don't have a job. Needless to say budgets gotta keep bare minimum.
Post by: 2T Institute on July 19, 2012, 11:20:26 AM
Do you want to fix the bike or just think of reasons why you can't do things ?
Do you want to help me out or just be a pain in the neck? Seriously if you're not here to offer advice, go away. It's pretty simple. I am actually doing year 12 at the moment so I don't have alot of time on my hands. And oh yeah... Theres that bit about me not knowing what I'm doing and would rather take the time to be certain than fry my whole ignition system.
I would like to help but your so rude and unwilling to do even the slightest thing to help yourself. So hard to justify the time when someone just expects and demands. Please spare us the hard luck stories as anyone with a career and kids will tell you Yr12 is a friggin breeze.Life only gets harder and more complicated. The bit in bold is a classic example of an unwilling attitude. Try some manners and humility
Post by: Stusmoke on July 20, 2012, 01:55:10 AM
Do you want to fix the bike or just think of reasons why you can't do things ?
Do you want to help me out or just be a pain in the neck? Seriously if you're not here to offer advice, go away. It's pretty simple. I am actually doing year 12 at the moment so I don't have alot of time on my hands. And oh yeah... Theres that bit about me not knowing what I'm doing and would rather take the time to be certain than fry my whole ignition system.
I would like to help but your so rude and unwilling to do even the slightest thing to help yourself. So hard to justify the time when someone just expects and demands. Please spare us the hard luck stories as anyone with a career and kids will tell you Yr12 is a friggin breeze.Life only gets harder and more complicated. The bit in bold is a classic example of an unwilling attitude. Try some manners and humility
First of all: You don't even know my bloody name, so don't go thinking you know all about my personality and attitudes.
I am actually GENUINELY CONCERNED about frying my whole ignition system, I'm not just being lazy. I don't recall saying year 12 was hard, do you? All I said was I was doing it at the moment. I don't even do homework. My point in saying that was I'm never at home during the day, well rarely.
Manners? When I'm asking for some help, I am NEVER rude to people who give GENUINE advice. I almost always say thanks to those who do or end my inquiry with a premature thanks. You're the only one being a jerk.
As for Humility, interesting word considering you can't even use the word 'your' in the right context
If thats an unwilling attitude, I don't suppose you'd have any issue with unplugging your computer, taking off the side panel, draining residual power and resetting your cmos? Or maybe you'd like to dissassemble your harddrive? Maybe put new thermal paste on your cpu? Reformat you're machine with a fresh copy of your operating system?
Once again: You don't even know my name, let alone know how much I love riding, how much I love bikes and my reasons for not wanting to get all the bits and pieces money can buy.
Please, if you're not going to help, just leave. Or personal message me with all your personal issues with me. Thank you
Post by: msmola2002 on July 20, 2012, 04:22:25 AM
As for Humility, interesting word considering you can't even use the word 'your' in the right context
Reformat you're machine with a fresh copy of your operating system?
Your. If you are going to call someone out for poor grammar, at least be correct yourself.
Post by: Stusmoke on July 20, 2012, 04:56:37 AM
As for Humility, interesting word considering you can't even use the word 'your' in the right contextReformat you're machine with a fresh copy of your operating system?
Your. If you are going to call someone out for poor grammar, at least be correct yourself.
Touche, well caught. Atleast I got it hte second time right?
In my defense, I was writing in a hurry cos I reeeeaaalllly needed to take a wizBack on topic: I hooked up the multi metre to the ignition coil as outlined in my manual. its reading was the same as when the test leads were 20 cm apart. I assume that means the resistance is either non existent or too much to measure? If resistance was high, would that account for the extremely weak spark?
Thanks
Post by: cnrcpla on July 21, 2012, 01:33:28 AM
Post by: Stusmoke on July 21, 2012, 08:42:24 AM
Did you sell your YZ? I'm wondering if you should have kept it
Nah I didn't sell it and a good thing too. When I get it running my folks will make me decide to sell one and I think it'll be the YZ if all goes well. I can flog it to my next door neighbor whos currently on a fooper and looking to get rid of it for a 250. Its due for some solid engine work too so If I can unload it before it screws up that'll be good.
Post by: cnrcpla on July 21, 2012, 09:48:34 PM
Quote
Nah I didn't sell it and a good thing too. When I get it running my folks will make me decide to sell one and I think it'll be the YZ if all goes well. I can flog it to my next door neighbor whos currently on a fooper and looking to get rid of it for a 250. Its due for some solid engine work too so If I can unload it before it screws up that'll be good.I see, well good luck with all of it, sorry I couldn't be a help with this, I don't know much about ignition systems and what not.
Post by: Stusmoke on July 21, 2012, 11:17:48 PM
QuoteNah I didn't sell it and a good thing too. When I get it running my folks will make me decide to sell one and I think it'll be the YZ if all goes well. I can flog it to my next door neighbor whos currently on a fooper and looking to get rid of it for a 250. Its due for some solid engine work too so If I can unload it before it screws up that'll be good.I see, well good luck with all of it, sorry I couldn't be a help with this, I don't know much about ignition systems and what not.
No worries mate, thanks for your post.
Post by: Stusmoke on July 29, 2012, 05:06:24 AM
Thanks in advance
Stu