How big is my dirtbike and what year

https://itstillruns.com/tell-year-kawasaki-kx-made-7612608.html

VIN:JKBKXFAC24A021390Vehicle:2004 KAWASAKI KX85-A

bring that number to a dealer, salvage yard or state office

First step, check, or get checked the valves!!!

go to www.bikebandit.com the have every dirtbike with a detailed diagram

here is a like where you can see blown diagram / parts and assembly catalogue,

http://www.motosport.com/dirtbike/oem.php?make=SUZUKI&type=DIRT&model=RM125&year=2008&groupId=68642

http://www.motosport.com/dirtbike/oem.php?make=SUZUKI&type=DIRT&model=RM125&year=2006&groupId=68569

regards

have you checked the reeds inside the induction side if they are corroded from sitting it will cause that problem, also check the spark plug, may just be a case of weak spark ,if still no good check the coila good way to test if it is a spark problem get a can of aerostart (wyns start ya bastard) and spary a little in carby, should start real easy. if so then spark is your problem. also just thinking check tat your exhaust has not collapsed inside itself or is blocked, that can cause no power too. hope i have been of some help.

If it's sat for 15 years, whether it's a dirt bike or a car, you should definately see if it runs first....

If it DOES run...then I would do some maintenance.

If it DOESN'T run, then it's wise to just check a few things first.

Water in the gas tank? Spark plug giving spark? Does it try to turn over? Is there oil?

If if seems effed, then just tear it down...it's cheaper to rebuild it in the long run, then to fix piece by piece, and end up fixing things that didn't need to be fixed.

I've never owned, ridden, or worked on a dirtbike. It's just all common sense.

The way I bleed bleed front and back breaks on any bike is with a big vet suringe(full of fluid) with a thin tube from it to the caliper nipple and push til the bubbles stop coming,works for me give it a go.