Yamaha YZF-R125 - Recent Questions, Troubleshooting & Support - Page 6

I am pretty sure you have a bent shift fork or two. You can't find neutral because the fork has the gears in the wrong place. Hard to say on the failure to start. It is probably tied to the shift lever stopper and/or torsion spring not indexing the shift drum in the proper position. The repair is not recomended for the home mechanic. The engine comes out then gets a total teardown to get to the bad forks, etc. Please rate my answer. Thanks.

you need to take this up with the manufacturer not for this forum

it is usually on the frame at the side where the handle bars are, just under neath them where the bolt is, should be a long nyumber, like mine starts with JC20 :)

Starter solenoid jammed. Locate it, near to the start which connects to the negative battery lead. Give it a tap with a hammer (seriously) this frees up the insides. Start the bike. If it still clicks. Check the earth strap going from the starter to the bike frame. Clean it up with emery paper or a wire brush, check other earth leads and do the same.

The starter might have worked itself loose, check the mounting bolts and for any rust inside the slots (if rusted you will need a new one).

If that still does not work, bump start the bike and take her for a run. Get back home and wait a few minutes, try to start it, if the cranking is slow, then new battery time.

on many bikes a rectifier is similar to the attached photo. alternating current(AC) is produced by the flywheel and stator, which is put though a series of 6 diodes, to allow electrons to flow one way only.
Producing DC current, to charge the battery. This DC current must also be put through a regulator, so the battery doesnt overcharge.

you mean to say that you want to service the bike by yourself
1st of all see when was the bike last service at how much Km.
if it was long time then 1st of all better replace Engine Oil & Oil Filter better go through Instruction manual for better understanding of your bike Engine it's working & every dimension for a hazard free trouble free ride just visit your nearest authorized service station.

During break in, everything breaks in. Valves need to be adjusted,bolts loosen(check your engine mounting bolts),steering neck bearings need to be adjusted,carbs need tuning,etc. 600 mile check ups often include changing the plugs along with the oil. You need to go over the whole bike with a fine tooth comb, it's probably a motor mount bolt.

Hi.

Try putting in gear with the rear wheel off the ground (use a stand and secure the bike safely). If it does the same, then check if there is spark when you put in gear, in that case the problem is electrical, it is the kick stand switch. There is a safety kick stand switch that will turn off power off, that is faulty or stuck, test is done jumping the switch.


Here service manual and wiring diagram.

Here a free manual for the R1S.

If the

The truth is the whole problem could be the battery, you've been starting it up but you may not have been giving the battery enough time to recharge, this time when you cranked it there wasn't enough juice to crank the engine and give you a hot enough spark to fire the engine. Put a charger on the battery and make sure it's fully charged then try it, it should start. Note: charging batteries put off sulfuric acid fumes, make sure you have enough ventilation.

check ur chain ya nob

You will not go wrong with a Yamahauler, they last forever and are the number 2 maker of scooters and street bikes and dirt bikes, forget the junk Chinese bike, very poor quality and parts are hard to get..

http://www.wemoto.com/bikes/Yamaha/YZF-R_125____YZF_125R/08/
The above site has extensive parts lists. The selection boxes on the right margin will get you to names, pictures, numbers and prices (albeit British)
Start with crankshaft bearing kits or similiar.

The site below has exploded view diagrams and names of the parts in all categories of the bike.
Cheers.
http://www.bikebandit.com/houseofmotorcycles/2008-yamaha-motorcycle-yz125/o/m17114

all of the Yamaha scooter line and indeed all there bikes are very good machines, they are reliable with no significant problems, as far as engine life goes as long as the oil is changed on a regular basis with synthetic or synthetic blend motor oil it will last in excess of 50,000 miles, the price seems a bit high, $1300.00 would be a fair price, suggest u offer that and see what happens.

Place the bike on a stand or crate so the front wheel is off the ground. Give the front tyre a whack with a rubber mallet and listen for the rattle. Move balance of bike forward so rear is free of ground and repeat on rear tyre. Your bound to find some more rattles. Periodical maintenance should include test tighten all bolts, nuts and screws, because that's what holds you above the ground!!
Cheers.

Hello, From my experence with most Motorcycles the Color Code is Not Easily Available to find like most Cars (under the Hood or in the Door Jam). I have Noticed on "All" Harleys and Some *** Bikes there is a "Label" with the Paint "Color Name" under the Fuel Tank. Also All Motorcycle Dealers have a "Paint Code Book" that lists All of the Painted Parts with the Colors by: Year, Make and Model. For Example: in 1997 Harleys used "States Blue Pearl" and in 2002 Harleys used "Luxury Blue" and 2005 Harleys used "Rich Sunglo Blue" & "Chopper Blue". So if you can't find a "Paint Label" on your bike? you shoud be able to call you Local Yamaha Dealers Parts Dept. and give him your: Year, Make & Model and he can tell you over the phone the Name of the Color of you Paint. Also "PPG" who is one of the Largest Mfg's of Automotive Paint also has a Computer listing of most Motorcycle Paints and can mix some up for you. Look in you local phone book under Automotive Paint Suppliers. Thanks Azharleybob

mighta gotten a few of the connections wet hit each plug in with a blow dryer for just a few seconds to dry em out

Well try Wemoto.com in the internet or use Google search engine.
If you know a bike wrecker nearby your area, check with them, you might find a good stator and at cheaper cost.

Google it or go to dealer and ask it is free to ask.

make sure the battery terminals are done up tight...& also the power terminal on the starter selionoid!!!

It is listed in the manual.
Here is the link for your manual.

http://ymenvom.nl/manuals/M3RV-8A.PDF

page 35 lists your spark plug type and the proper gap.