Tunning tips for CR 500 -99

[Risveden]

Can someone tell me some god tunningtips and how they works for the CR 500 -99 engine?

 

[dubious]

Buy Eric Gorrs book - Motocross and offroad performance .
A great source of info besides a service manual.
Also try Cr500riders on the web.
Your question is quite vague, so you'll have to do some research.
There's lots of info out there if you look!!
Good luck!