20 Most Recent
2008 Yamaha yZ125 Questions & Answers
Yamaha rxs 100 can anyone help its been fouling up
1) Is the choke stuck on? Solution: spray carb with WD40 and make sure it moves freely when you pull the choke on and off.
2) are you using the correct 2T oil? It may be that it is pumping too much oil through.
TIP: Take out plug and look at colour. if it is brown/tan it is ok. if it is white then there is not enough fuel going in. if it is black and sooty then there is too much fuel (choke stuck on) if it is black and oily wet there is too much oil (adjust the oil pump as per handbook)
3) Could be ready for a decoke. How many miles has it done? Solution: REDEX teaspoon down spark plug hole, turn engine on kickstart with ignition turned OFF. Wait a few mins and start up bike as usual,a few revs should chuck out loads of smoke and clear its guts out.
Yamaha yz125 2008
Have no spark on the
I don't have an exact for your model but resistance issue will be very easy to spot as when you test you will get usually zero as the reading if faulty
roughly speaking you would expect 240 - 380 and 720 - 1000 and 40 - 66 on the three pairs of wires coming direct from stator if you get zero as the reading on any of the 3 pairs then the stator is the fault... Rarely does the coil pack fault without impact or over heat but for the coil pack 0.08 - 0.10
let me know if you need clarification on testing ... Good luck!
2008 yamaha yz 125 carburator
You say it's flooding - is fuel coming out the overflows? If so, you might need to replace the needle and seat, but based on the age of the bike, I wouldn't think you would have to do that yet. Even with a bike that is raced, you can get many, many years on the needle without having to replace it - unless something damaged it. Inspect the needle and seat closely for nicks or imbedded **** in the sealing area. Also - I assume you set the float properly. This is an important step. Personally - I think the factory setting is too high - since about 2001 I have set the float 2MM lower than recommended. Otherwise you will have fuel pouring from the overflows on the faces of jumps or in the whoops.
If the engine is "flooding" - it could be down on compression which will make it run rich. Or you might just have to re-jet but I would only re-jet if the engine is fresh. You can also try running a B8ES pluf - it's a step hotte than stock and what I ran. Keep in mind that the ring in a 125 doesn't last long at all. There's only one ring. I would replace the ring before each race when I was running 125s - this happened every week during the season. 2-3 ring replacements per piston, 4-6 piston replacements per cylinder.
If you provide more info, I can give you a better answer on your exact problem - I don't know if I really know exactly what the problem is.
Scott
I am trying to figure
JYACEO5C6YA003794 is not a valid VIN. However, JYACE05C6YA003794 is valid. The letter "O" is never used in a VIN. Below is the info requested. :-)
I can't get spark from
There are a lot of tiny fuel and air passageways in the carburetor that must be kept clean it order for your scooter to run right. Carefully, take the carburetor apart. This can be relative easy. The carb has tiny passages that can get gummed up. Your bike will not run correctly if the carburetor isn't completely clean, so take your time. I use a gallon container of carb dip (you can get a gallon at your local auto supply store).
First, remove all of the rubber and gaskets or they will get damaged. After a 20 minute soaking in carb dip, I blow out the carb with compressed air. You have to get all the jets and the passageways clean. Be sure the jets are clear, especially the starter jet. Sometimes carb cleaner won't clear out these tiny jets. Use a guitar or a piano string, a strand of copper electrical wire, or a tiny drill bit pin vise. Be sure not to increase the size of the hole in the starter jet or you'll change the tuning. Carefully reassemble everything, checking for cracks in the rubber carb boots and the gaskets. Replace them if they are old and cracked. Be sure and remove all rubber and gasket material first or they could get ruined. Spray carb cleaner also works if you're diligent.
If you have an electric choke, check it to make sure it works. Check the resistance between the wires - you should see around 10 ohms or less. Measure the length of the choke assembly. Remove the choke from the carb and plug the wires into a 12V source for 15 minutes. The choke body should be warm. Measure the length again - it should increase by around 1/8".
Next, consider whether your exhaust pipe is clogged. This is especially a problem with older two stroke scooters. The unburned fuel/oil mixture builds up in the exhaust pipe along with carbon over time. If the exhaust pipe is clogged, your scooter will run terribly or not at all. It can be difficult to tell if the exhaust pipe is clogged. The easiest way to tell is to remove it and try starting your scooter. It will be a bit loud - two strokes will sound like a chain saw. If it runs with the exhaust pipe off, you know that is the problem.
put a meter on the kill switch to see if you get voltage across it and check the magneto i would think that the contacts have gone rusty clean them with some fine sandpaper
also if the bike has been standing for a long time(six months or more) then replace the fuel because when its old it loses some flamabilty
hope this helps
John
I need the tourqe specs
Hi and welcome to FixYa, I am Kelly,
Cylinder nuts= 22 ft-lbs / 264 inch lbs
Head nuts= 20 ft-lbs / 240 inch lbs
If you had to change any crankcase studs the stud torque is 9.4 ft-lbs. / 112.8 inch lbs
Thanks for choosing FixYa,
Kelly
Just wanted to know how
ATF is normally about 12 weight. You can use it if that weight works for you.
I'll let someone else handle the how much part of your question.
I need to know the
I don't have the factory manual for the 83, but if the bolts are M8 x 1.25, the torque specs are 30NM. The oldest YZ book I have goes to 96, I checked for 96 to present is all the same. That is the standard torque for a fastener that size. Good luck!
Hi guys, can anyone let
It may be pop riveted, I know on the WR the plastic guard is fitted in Australia, not Japan, and they use what is called a rivnut, which is like a rivet but leaves a thread to screw into.
So if it looks like a pop rivet, it may be.
How do you check your
On a MX race bike like that you really don't check them just replace the oil regularly - every 2-3 hours ride time would be OK but if you can afford it then more often the better
Just double check with your local Yamaha shop for exact amount to refill back in to be certain is correct amaount but it will be approx 650mL
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