SPOON PROGRESSIVE SPRINGS For HONDA S660 JW5 51400-JW5-001Brand SPOON Series Name PROGRESSIVE SPRINGS Product Descriptions Since S660 has already been set low in STD, we will sacrifice stroke if we lower down more than necessary. Therefore, SPOON has developed a lowdown spring that does not sacrifice the stroke and further improves the high turning ability of S660 within the scope of safety standard compliance. Cornering performance and straight running stability are improving, but by setting the thrust up