Just when you thought everybody was covered on this topic.
From personal experience.
Tapping the threaded holes for the front cam chain adjuster is miserable. So don't be like me and don't be lazy. Pull the airbox, pull the coolant line and take your time.
I didn't and seriously wish I would have. (made this otherwise 2 hour project 5 hours and lots of stress).
I'm only 4k miles from home on a work trip. (probably not the best time to be doing this type of work).
using a co-workers rental condo landlords standard tool set.
I installed APE Racing units. And the guys at APE racing are fantastic.
However, he did recommend installing the manual cam adjusters at TDC. I'm not 100% why? But that's what I did.
also important to note: a short wrench might be required or a crows foot to tighten the locknut on the forward cylinder.
I had neither and this only made the job that much harder.
Otherwise my "Sounds like a connecting rod coming through the side of a motor" cam chain noise at 37k is finally gone. Jeez that was a noise I didn't like hearing.
also from APE Racing, "Don't make this adjustment out to be more than it is.
Finger, yes finger tight, then back off 1/4 turn on the adjustment and lock in place). That's it you are done."