Maybe I missed it(too much reading) ,but did you say if the timing is wrong, when he checks it, that he is going to have to remove the cam chain from the cam to change it. It sounded like you said to move the cam without saying remove the chain(that would just keep the timing the same). Maybe you could clarify that important part.
2000 400ex 11:1 Wiseco,stage 2 Hotcam, WB R4 full exhaust,WB rev box, K&N/OW, 450r carb, no lid, +2 a-arms,Works shocks,GForce axle,chrome stem,fat bars,250r hood, brake blockoff, ASV clutch lever, race cut fender.
2003 Cr250 White plastics, V Force 3 reed cage.