Hi also from SF Bay Area

[Maddevill]

Hi,
I am helping a friend with his roadracing program and convinced him that a dirt bike is a great way to train and stay in shape for the off season. Last year we found a 99 KX125 and he has been learning on that. Saturday we picked up a 2000 KX250 for cheap. Never raced, apparently trail ridden. Has a few issues but started and ran decent. Some noticeable piston slap at idle and compression is down. Even so, he came back wide eyed about the power. So, at least we'll be doing a top end. Going to look at the crank when we get it apart. I heard about the thin nicosil from Kawasaki so will probably have Millenium recoat the jug. I'd be interested in hearing about any other tips and tricks for this bike.

Thanks all

Maddevill

[umberto]

Hi Maddevill, welcome to the site.  If you get a chance, post some pictures of the bike and let us know what's already been done.  Has the suspension been redone for your friend's weight and riding style?  If not, that would be the place I would start.

Here is a guide on how to post pictures using Imgur, which is a free site.

http://www.kxriders.com/forums/index.php/topic,16965.0.html

[sandblaster]

Hey Maddevill.
Go completely through the suspension...
Inspect and replace all the bearings, seals, ect.
Get the forks and shocks revalved and sprung for the rider weight.
Nothing will make you faster then getting the suspension set correctly.
Millennium is my personal favorite for plating and machine work.
Wossner piston and rod kits are available for that bike.
Personally I would go through the engine and replace every bearing, seal, oring, spring, bushing, and washer, due to it's age.
Then if you really want more power look at raising the cylinder .040", cutting that much off the top of the cylinder deck, slightly modding the cylinder porting, re-jet the carb, then hang on to your britches....

[Foxx4Beaver]

Hey Maddevill.
Go completely through the suspension...
Inspect and replace all the bearings, seals, ect.
Get the forks and shocks revalved and sprung for the rider weight.
Nothing will make you faster then getting the suspension set correctly.
Millennium is my personal favorite for plating and machine work.
Wossner piston and rod kits are available for that bike.
Personally I would go through the engine and replace every bearing, seal, oring, spring, bushing, and washer, due to it's age.
Then if you really want more power look at raising the cylinder .040", cutting that much off the top of the cylinder deck, slightly modding the cylinder porting, re-jet the carb, then hang on to your britches....

+1, go through the entire bike.