That's a really unique motor......never heard of a piston without a gudgeon, how does that work?
Aluminium or Teflon buttons that essentially rub the cylinder wall.
Wow interesting design......thought i had seen it all after holding a NR750 oval piston with twin rods and 8 valves per piston.
Sorry I re read what I wrote. It has gudgeon pins but not the actual CLIPS or spiral lock setup. It just uses those buttons to fill out the extra space.
A little.. not much more to me though haha. Why not just run clips?
Guessing its a point of difference along with the zero risk of the clip coming adrift and scoring the bore.
I think they are VERY common in Drag engines as there is way less risk of dropping a circlip into the sump. Esp when fast engine build turnaround is critical.
That makes a lot of sense.
