| Author | Message | ||
     Doerman |
The belt runs across three pullies. Front sprocket, idler pulley, and the rear sprocket. The belt is always taunt. As the suspension works its up and down motion, the belt will experience slack and taunt on the top part and bottom part depending on if it is an up or down motion. This would send forces on the taunt side of the belt. Forces that would be intolerable to the wheel bearing and/or the front sprocket bearing.These forces are only avoided if there is no offset between the pivot point and the shaft for the front pulley. By visual inspection, there seems to be an offset. Obviously, bearing failure does not happen, so how did the Buell engineers avoid this? Chain driven bikes are avoiding this by specifying a slack in the chain. Just curious. Thanks... Asbjorn | ||
| Diablobrian |
They Actually designed the tensioner so that through the travel of the swingarm belt tension remains constant because the planes of motion keep the belt at the same tension. There was a Fuell article explaining the details of it far better than I am with pictures. I'm sure someone has a link to it. | ||
| M1combat |
I believe that Fuell article indicated that there was only .010" difference in belt path length between fully compressed and fully extended. | ||
| Blake |
Constant path length final drive for sure.  "Taut". Also FYI: This would best fit in the "Drivetrain - Final Drive" KV topic. |
