A few instances of VHT members' accidental misinterpretation of the proper cam chain adjustment procedure for the DOHC 450 have come up recently, and it seems they have been caused by the visual of a moment from a those guys in Houston video showing the adjustment. It's interesting that no words were spoken in the video directly describing the very moment that caused this misunderstanding, because when those guys in Houston misinforms people about adjustment specs or proper procedure they usually accompany it with discussion about why they think it's "better" despite the often-significant deviation from the FSM. No, in this case they simply said "alright, that's it, you just tighten it back down again, it's an automatic cam chain adjuster" - except they didn't just tighten it back down. They only tightened the tensioner lock bolt finger-tight immediately after saying to tighten it back down, the very lock bolt they needed a wrench to loosen only a half minute prior.
I'm not posting their video, but you can view the segment in question here.
To be completely clear, this is the correct procedure:
First, position the crankshaft at 90° past LT on compression stroke, then loosen the tensioner lock nut, then loosen the tensioner lock bolt. The spring-loaded adjuster will tension the chain. Then, without moving the crankshaft, first tighten the tensioner lock bolt to secure the adjustment position, then tighten the tensioner lock nut to secure the tensioner lock bolt.
I'm not posting their video, but you can view the segment in question here.
To be completely clear, this is the correct procedure:
First, position the crankshaft at 90° past LT on compression stroke, then loosen the tensioner lock nut, then loosen the tensioner lock bolt. The spring-loaded adjuster will tension the chain. Then, without moving the crankshaft, first tighten the tensioner lock bolt to secure the adjustment position, then tighten the tensioner lock nut to secure the tensioner lock bolt.