RK Upgrade Kit Aprilia RS4 125 & Replica 11-17 (new shaft 5mm hole)

RK chains recommended OE upgrade chain and sprocket kit Contains: Sprocket Rear RK-B3301-60 JTR25 Afam 92220 | RK GS428HSB-136 Gold Heavy Duty Chain | RK Chain and Sprocket Kit Box | JT Front Sprocket JTF277.13

RK Xtreme Upgrade Kit Aprilia RS4 125 & Replica 11-17 (new shaft 5mm hole)

RK chains Xtreme OE upgrade chain and sprocket kit Contains: RK Chain and Sprocket Kit Box | RK 428KRO-136 O-Ring Chain | JT Front Sprocket JTF277.13 | Sprocket Rear RK-B3301-60 JTR25 Afam 92220

RK Standard Kit Aprilia RS4 125 & Replica 11-17 (new shaft 5mm hole)

RK chains OE grade chain and sprocket kit Contains: Sprocket Rear RK-B3301-60 JTR25 Afam 92220 | RK Chain and Sprocket Kit Box | RK 428SB-136 Chain | JT Front Sprocket JTF277.13