Hello all I just bought a new yz450f and I got it in peices, I have a head that the previous owner, recently had redone by millenium. For some reason he have taken the valves out (I'm guessing because the intake cam seized.) Anyway I sent the head to Engine Dynamics and has the intake cam journal bored and now I'm left with trying to put the valves back in.
The "other guy" put all the valves and springs and retainers in the same bag. I know which valves are the exhaust valves but I can't spot any distinct differences in the intake valves. Is the middle valve supposed to be slightly longer than the other two?
The next problem is differences in springs how to tell? I've visually inspected them but can't spot the differences. Where should I use a micrometer to tell the difference?
And keepers I have a pile of them are they all the same intake to exhaust? As well as the retainers?
Any help is appreciated.