I think I do understand, and do need your belt link.
My engine plate does sit on two rails for sliding adjustment. I have four bolts that penetrate down thru the engine plate and pull up two cross bars that grab the engine rails bottoms. At the rear is a long ½” bolt for adjustment. Just working out were the jackshaft can be installed with the hardware I have ( to cheap to buy new clutches). Placing the jackshaft up front is best I'm sure, I was hoping to shorten chain length. I can always install tension idlers if I need to.
Can I go out of spec and install a longer belt? If I can, it may be easier to install the jackshaft. I will have no trouble setting the alignment of the clutches, I made a tool for that. The distance between pulleys is my concern now. Keeping it Yamahas 10.63 is hard with the space available.
Thank you and please send the belt info.
RDomke@Comcast.Net