Dan
I’m the one that got APE (American Performance Engineering) to make their
manual cam chain tensioner way back when the OEM tensioner was causing so much grief in 2009. There is no oil passage to the cam chain tensioner to block off, it is a mechanical design without any hydraulic interaction. If you decide to install the APE manual cam chain tensioner, it will work just fine provided you, or your mechanic sets the tension properly. This is not a set and forget type of device. Usually the people who run these are engine builders for the performance and racing crowd. The engines are ran hard, then torn down fairly often.
The FJR has a different mission from the track bikes, and most likely will never see the near redline demands so common on the race track. Dependability and hands off longevity for the street is the design goal for this automatic tensioner. Yamaha’s original unit had its weakness redesigned out of it with the subsequent updates through the years, and has proven itself reliable. I successfully ran my APE unit for 5 years before I went to the blue dot, and then the current green dot OEM version. In my mind Yamaha did their job in supporting their customers with their updates. You should not have any grief with the current green dot unit, as it most likely will last the life of the bike.
Now get the bike in good shape and put some (s)miles on it; start supporting your favorite tire manufacturer.
Brodie