Rear bolts holding them into the frame and stock passenger foot pegs plus heat shields that are not included in the 4-4 pipe set.
I use 1/2" heat/oil braded hose I cut in correct lenght and open up. Wrap it around the connecting pipes between 1-2 and 3-4 pipes. Cut lenght so each side will gel too halves to fit. Strap it together with a black nylon strap or 2.
Stock is complicated to get on. The homemade easy afterwards when pipes are fitted. Remember that you need to lower rear to get fron to hook onto the head spigot. When raising rear it will lock.
- Do not hammer on pipes at front when a pipe or 2 have glided off spigot a little!! , Lower rear and slide on at front.
Hammer on them will not move them when the spigot angle work as a self locking device.
In correct position here you can strap a luggage strap around 2 pipes or all 4 so they will not slide off.
Easier to do one side first, then the other.
It needs some fiddling to get it to fit the frame hole with the long bolt.
It differ bike to bike and maybe head will affect too.
My K6 needed the pipes to sit as deep as possible at front while my K2 did not. I used same pipes.
I had to lower rear and let pipe slide off the spigot a little.
No 2 need to be trickled inside of the sidestand.