2007 Yamaha yZ 125 - Answered Questions & Fixed issues

The problem sounds like your idle jet is clogged. This sounds hard but its really quite easy if you have basic tools and talent. You need to remove the carburetor, pull the bottom off and look for the very small jet that is up inside of the carburetor. Now you will see the big jet at the bottom and next to that you will see what looks like a tube up inside that tube is a small jet with a small screw driver you can remove this. Now use some car cleaner and cover you eyes and spray untill you see the cleaner come out the other end. That is the quick fix if you want to get carried away just rebuild the whole carb the kit is very cheap. But to just get it going do the above its been done that way for years... Good Luck

dont worry its a 20 amp (yellow fuse) in a box beside battery that has blown just change it for a new one. in the little box it should have some spear. dont worry happens often. well to me anyway lol

Take off the clutch's pressure plate (number 8) and check the springs (number 9) behind the the bolts (number 10).Also slide out the pushing rod (number 22) and its ball (number 21)http://partstream.arinet.com/Image?arik=s4v92978S7HV4vH84i3c&arib=YAM&arim=JMhloO8LxE2SkB6h4D15_Q2&aria=KqPb43rX1aEiFk1QqfzQYA2&ariz=2&ariv=http%3A%2F%2Fwww.babbittsonline.com%2Fyamaha-motorcycle-parts

Clutch cable or lifter brokenRide Safe Bike-Doc

These are pretty easy if these are stock forks,,, you can actually do it without losing any for oil. I used to do it all the time in the dealership. DO NOT remove the fork caps yet,,just loosen the cap about 2 turns. Remove the forks from the bike, Secure them, one at a time in a vertical position, I had a LARGE vice sitting on the floor. You want to remove the cap now and hold onto the fork leg so it does not slide down real fast!!!! Ease it down until the spring shows, remove the spring almost all the way until all the oil drips off the spring, remove it and lay it somewhere clean. Slowly lower the leg into the slider, remove the seal protector, Look at the fork seal, there is a snap ring that holds the seal in, carefully remove it. Take a 4mm drill bit (.160"+-) and drill two holes in the top of the seal, 180 apart. I had a "hook" tool I used to work the seal out. Once its out, slide it up and over the tube, CLEAN the fork tube!! CAREFULLY oil the new seal and carefully work it over the tube, slide it into place and work it down, now with a FLAT drift tap a little at a time until you can install the snap ring fully seated!! Raise the tube, install the spring and cap. Once the tubes are installed in the triple clamps you can fully tighten the caps! Repeat for the other one and reinstall. TAKE YOUR TIME!!

18 to 20 ft pounds.

I am not a expert so asker beware, but it might be that the clutch pads might be worn out or the pressure plate might be a little loose

You have a failed bearing in the case for the kick starter. check manuals.. can access on-line. Good luck Jerry

Can it be air inside that cannot escape something must be unmounted or turn loose maybe otherwise it will not fill ? Its like so its must be deflate of air thats locked

needs new spark plug, or bad electrics.

if you have no compression could be a number of things , bad rings , bad valves broken rod , it will lockup if you try to start it my guess it to rebuild it before you throw a rod and then you have junk

clean the carb out !

From what I found it looks like it is a 96'

you takin the mik as there is one feed pipe

seized piston, cracked internals no good whatever it is

Check your oil for metal particles. Is your oil level correct? You may have ground the innards to death.

Just a thought, check to see if there is any obstruction in the airbox or air filter, and that the air filter is installed properly.

You don't " get a cylinder cleaned ". Who ever says that doesn't know what he is talking about. I assume the engine is a two stroke. The gas/oil mixture should be 32 to1. That means 4 ounces of two stroke engine oil to one gallon of gas. If the scooter has an automatic oil pump be sure there is oil in the oil tank. It should automaticly pump the engine oil at the proper rate. If this is an older scooter, you could remove the cylinder head and de-carbon it and then check the exhaust port to be sure the port has not been made smaller due to carbon build up. The port should be about 1/2" tall and 1" wide. Also check and clean the air filter. If it is a new scooter is it still under warranty?