2001 yzf426 front fork leak

Either repair any VISIBLE leaks from wherever u see it leaking from, if no visible leaks its the master cylinder. PS, I assume u mean the leak is brake fluid & not vacuum.

Hi i have a 2001 yzf 426 i got it with 3 bent valves so i replaced them and the pistion rings but still no compression but think my timing is right

It's possible you may have leaked some oil, but first things first, clean the heck out of them and ride it around again to see if you are STILL leaking oil. If you have to top them up, there's a few methods out there, one guy I knew used a meter stick to measure the oil in the forks, but if you are going to be in there, you might as well drain the oil and start over with the correct amount of fluid. I hope this helps a little. Good luck.

Bruno

are the forks leaking oil? is there air pressure in the forks? Start by draining the forks and putting in the correct ammount of the proper oil, and getting the air pressure right then see how she rides. Other things to check, front wheel bearings, worn triple tree bearings.

The oil seal on the sprocket shaft has probably gone bad. Remove the sprocket then clean the shaft to aid in removing the old seal. A screw driver and small hammer is used to pry the outer edge of the seal inward. Realize that you will butcher the old seal in the process of removal. The only other way to remove the old seal is to pull the engine and split the center case.

it sounds like your fork seal has failed,it wont affect your brakes but will make your front suspension feel a wee bit "soggy"and will affect your handling,i would suggest getting the seal replaced as evetually the oil from the faulty seal will contaminate your brake pads that will affect your braking performance,replacing the seal,sooner rather than later ,would be a wise move..hope this helps...cheers

Your dealer will have one or try a Chiltons manual. There is no inspection checklist per say. What is the problem with your front end? Take the bike up to 50mph, take your hands off the bars and give one side of the handle bars a quick tap, if your front end (neck bearing) is loose you will experience a wobble which depending on the severity will increase meaning you have to tighten the big nut on the frame neck. The service manual will show you the proper way to perform the fall away test which will help you get the front end adjusted properly. If you just want to change the fork oil thats easy, just put a jack under the front end to lift the front tire clear of the ground then release the drain plugs (be careful not to strip them) and let all the fluid drain out. lower the jack and compress the forks to remove all remaining fluid. Lift the front end up again Then reinstall the drain plugs, remove the big bolts from the top of each fork and pour in the required amount of hydraulic fluid to each fork and replace the caps. These front ends are pretty simple and almost maintenance free. If it looks like you have a hydraulic leak coming from the top of the sliders just double check that its not excess grease from the neck bearings leaking down onto the top of the sliders (the bottom part of your forks where the tubes move up and down into. Many bikes come into our shop with possible front end leaks that are neck grease which especially on days will work its way down your forks making it look like the front end is leaking. Buy a factory HD manual which shows you step by step the procedure for taking the forks apart for seal replacement, fall away tests etc.

Yes the leak is causing uneven pressure on the front of the bike! The pressure in the left fork is greater then the right fork and will cause shaking of the front end!
Replacing seals and oil to the right fork will fix the shaking!
Hope this helps!