I'm not sure how this works. Is it an electrically operated solenoid controlling air pressure to open a spring tensioned valve?
its alot of hassle, thats for sure...but the possibilities of having unlimited cam variations built into one motor and having it change with driving conditions is pretty sweet
Sure would be nice to not have to worry about timing belt/chain maintenance. I had to replace the OEM auto cam chain tensioner on my FZ-09 with a manual one. Even though Yamaha has release 3 or more revisions of theirs, they still fail in ridiculously short periods of time. The APE manual tensioner I put in takes a lot of the concern out of it, but it adds yet another maintenance issue to remember to deal with.
Yea, the odd thing is some of them are good. My buddy has the exact same bike - 2014 FZ09. His is fine. My was noisy. If you take a look at FZ09.org you'll see some people have been through all three of the OEM revisions so far. Some have their original. If Yamaha had actually recalled it and it didn't cost anything to replace I would have gone OEM.
Koenissegg has a running engine. They have been doing this for some time. Currently it's on I believe a Audi station wagon that they milled the head and installed these types of valves. They stated they are durability testing it and staffers drive it every day and so far it's working well. They had an oscilloscope showing the valve lift and it's cool to see a square profile
