Piston ring -POLINI- Aprilia SR DiTech LC, SR Sport, Cagiva City, Progress, Derbi Aceno, Atlantis, GP1 LC, Hunter, Paddock ST, Predator, Garelli Noi Matic, Honda Bali, Camino, SJ, SFX, Dio, SP, SR, Dio ZX, PX, Shadow, Vision, Vision Met in, X8R, Kymco CX

Piston rings are wear and tear parts of every engine. At least when the compression is down and you feel the power no longer coming in, the rings should be replaced.