Top 20 2010 Yamaha yBR 125 Questions & Answers

Remove the speedometer, remove the housing. The bulbs are in deep recesses accessable from the back.

Hy a have a 2007 yamaha yber 125 it starts first time but then cuts off after 10 seconds anyone know what this is am struggling

Is it a cable tacho or electronic? If you have done any work around that area, check you haven't unhitched any wiring to the tacho, also check your fuses. If cable tacho (mechanical) check cable hasn't snapped. Always make sure cable is well lubricated specially after riding in wet conditions.

obvious that those guys do not have a clue take it to an accredited bike shop that has experience on yamaha bikes I suspect that it is in the carby if it has a carby or in a sensor if efi yamaha engines start well and perform well

Depending on the age and use the machine has had, the problem would quite possibly be worn engagement cogs on the gears. I would be considering a rainy day mechanical project, or a trip to my local repair tech to find out a cost estimate.

Use a test light and check the power wire, if you have power at horn terminal check the earth side of the horn grounds. If no power at horn terminal check horn switch for power.

I'm making sure I'm thinking about the right vehicle. Honda dirt bike right? Either way sounds like a fuel deliver problem. Your losing psi and speed up. First thing I'll check is the fuel pump at idle then at higher rims.

Do a leak down test on the fuel tank and tap the carb the float in the bowl could be stuck thus over flowing fuel

Sarah, You haven't given nearly enough information for us to be able to make an informed diagnosis of the problem. We need to know what wires you're referring to and where you're connecting them to.

ring Yamaha dealer they will tell you what the codes mean.

how much free play you got on the clutch lever ? 3mm max !! or do you mean it just wont select at all what ever ? mite have bent the selecter fork ! remove clutch cover while the bike is leaning over on opposite side so oil stays in ! look and operate gear lever !

Most modern motorcycle are self adjusting this is something that should be done by a mechanic if it is a manual adjuster. If its to loose it could jump a tooth or worse the chain could come off all together. If to tight will damage the adjust.

It still may be the bulb. There are with some bulbs 2 or 3 circuits and 1 may be burned out. Next in line is a flasher unit and finally a fuse to check. Do both left and right turn signals not work? Sounds like the flasher unit. Unit is often set up under the seat. good luck.

find the drain bolt under the engine and remove with a large bowl to catch it , once done then remove filler cap and refill and you either have a dip stick on cap or a sight glass on the side of casing to tell you when full !

You first need to establish if the system is fused ??

bAD EARTH SOMEWHERE??

What's it dropping to? How old's the battery? Did you make sure battery has a full charge? Did you have the battery load tested? Did you check the cables and associated wiring for clean connections?

CAUTION: Adjust the oil level in 5 mm (0.2 in) incre- ments or decrements. Too low oil level causes the front fork to produce a noise at full rebound or the rider to feel some pres- sure on his hands or body. Alternatively, too high oil level will develop unexpectedly early oil lock with the consequent shorter front fork travel and deteriorated perfor- mance an characteristics. Therefore, adjust the front fork within the specified range. Standard oil level: 90 mm (3.54 in) Extent of adjustment: 80 ~ 120 mm (3.15 ~ 4.72 in) From top of outer tube with inner tube and damper rod fully compressed without spring.

One of those wires is potentially for the light bulb inside the tach. Find that one first. The black should be ground, and the red should be coil, but, how many coils do you have? Mine had 4, and it was the one on the far right that worked the tack, Check it out.

The facts mentioned does convey that the engine is not tuned properly and so lack in performance.
I would request that the fuel settings be checked and corrected with a proper tuning of the fuel /air mixture.
The spark plug must be removed and checked as it will indicate the performance. It should be clean and not sooted . If not replace plug, set the correct gap. Now check the timing of the spark and set it .
The spark intensity and a correct fuel mixture will give you a good cold start and good performance.