Advice needed on CRF250R Valves

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Joined
Dec 25, 2010
Messages
1,012
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58
Location
Burgersfort - Limpopo
Bike
BMW R80GS
I recently bought a 2004 CRF250R for my son. apparently the valves were done recently by Honda. Need some advice on following please :
Does the timingChain adjust itself? If not how and on what intervals to do it?
What needs to be done on the valves and on what intervals?
What to listen to in the engine to try and be pro-active
 
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