Well all chains are maintenance free for the life of the chain when you think about it... lolAnything touted as "lifetime" or "maintenance free for life" would be extremely suspect to me.
My Kawasaki C10 had screw tappets. Not that bad to check and adjust. You will recall that muscle cars of the hot rod era had solid lifters. The hydrolic lifters would "pump up" at high RPM. That was then and this is now. No reason that hydrolic lifters could not be used in a medium sized non high reving bike like the Honda Pacific Coast, IIRC, used.The obvious solution - short of a shaft - is to go with a belt.
It's been done on many lines, and Harley adopted it across the board. It takes engineering to get the power shaft on the same line as the swingarm pivot, to keep tension uniform or near...and the excuse I keep hearing is, they have to limit rear-suspension travel...
Yeah. I believe that like I believe the rot about hydraulic tappets.
The BMW G450X had a countershaft sprocket that is mounted on the swingarm pivot. The swing arm pivot runs through the center of the output shaft. The chain slack never varies with swing arm travel.The obvious solution - short of a shaft - is to go with a belt.
It's been done on many lines, and Harley adopted it across the board. It takes engineering to get the power shaft on the same line as the swingarm pivot, to keep tension uniform or near...and the excuse I keep hearing is, they have to limit rear-suspension travel...
Yeah. I believe that like I believe the rot about hydraulic tappets.