This uses 5/16 steel plate.
Yamaha xt500 old style adjusters or stock snail adjusters.
The backing plate is optional for extreme riding.
Very easy to make, no axle width issues... same as stock +/- a tad
i'm posting 15 pics so hold up on comments till #15 is posted please
Done.. I might build this one.
Your ideas keep getting better and better!
I wish I had a plasma table or a water jet. This would be easy and quick to produce.
Very nice concept. However...
There will be some serious bending moments around the bolts depicted for assembly. While you can get bolts with good shear strength the mild steel they pass through might deform into the open slot ways. I would suggest welding the three pieces into one monolithic assembly for off-road durability.
2003 TW200 "Betty Boop"
2006 TW200 "Mr.Gizmo”
Neglected 2-Smoker Hanger Queens:
1981 KDX175 Enduro
1982 YZ250G MX
There is no shear effect, or close to zero.. The upper and lower flanges stop all movement up and down of the entire assembly, in addition the flanges from the stock swing-arm go into tight slots, - they as well stop all vertical movement, the assembly can not move forward as it's blocked by the end of the slots and the end of the recess in the stock swing-arm. The TW does not have reverse so rear movement is not an issue unless your being pulled out by the back wheel but the frame would crack before those bolts (look up some shear values for common bolts). The two main plates are shown as welded anyway (whitish beads in drawing). The third backing plate is actually optional for extreme lateral forces and will not be needed in my calculations ever. If there where high shear forces we would have grooved axles and snails. The friction of the plates at their opposing surface areas at proper torque almost reduces the shear (if there where any) to zero anyway. Meaning that, calculated without the slots, flanges, and the end of swing-arm recess stopping forward movement the friction of the plates under the torque of the bolts is enough to hold firm. Considering that the two bolts are in the end of the slots there movement is contained as well. If anything is going to move it would be the axle in it's slot. That's the same risk we deal with today with little to no issues if properly torqued. So an accident waiting to happen? Sure they can be welded but the plan was for it to be removable. If it was welded one plate would be enough.
I hope you see how shear is contained and the bolts play little to no part in vertical or forward movement.
Last edited by JerseyJeeper; 03-15-2017 at 10:11 AM.