49mm 90cc Big Bore Cylinder Kit & Head For RR Alu En-ro Mo-rd Track RK6 50cc LC 2T

49mm 90cc Big Bore Cylinder Kit & Head For RR Alu En-ro Mo-rd Track RK6 50cc LC 2T

• Capacity Jump: 49mm bore lifts displacement to 90cc for quicker takeoffs and better passing power on liquid-cooled engines
• Wear Guard: Hardened bore coating fights scuff marks from elevated piston speed while keeping friction low
• Head Matched: Cylinder head comes pre-fitted to work with the larger bore size, saving you from having to source one separately
• Parts Bundle: Gaskets for both base and port included, letting you finish the rebuild without extra shopping trips
• Direct Swap: Bolt pattern and port locations mirror the factory setup, so you can install it using standard hand tools only