well was searching online for a service manual and came across these 2 from this website called
Motocross and My Life in General ? MXGuy.com. it has them for 2000-2001 honda cr250r and 2002-2003 honda cr250r. Hope this helps you guys out I know it has for me.
2000-2001 Honda Cr250R Service manual 2002-2003 Honda Cr250r Service Manual
He also has some for 2004 KX250F & RM-z250 Service Manual, 2006 Kawasaki KX250F Service Manual, 2006 Kawasaki KX450F Service Manual, Honda XR400 Service Manual, 2003 Yamaha YZ250F Service Manual, 2002-2003 Honda CRF450R Service Manual.
This site has helped me out allot when tuning my bike and I hope it will help some of you too.