Short Description

Premium SR70 47MM water-cooled cylinder kit, high-performance big bore upgrade set for SR50, SR70 2-stroke liquid-cooled scooters. Featuring 47mm bore size and professional water cooling structure, it delivers excellent heat dissipation and stable high-load performance. Effectively boosts engine displacement and power, ideal for engine overhaul and racing modification.

Long Description

This SR70 47MM water-cooled cylinder kit is a professional big bore performance upgrade part specially designed for Aprilia SR50 and SR70 2-stroke liquid-cooled scooter engines. Different from ordinary air-cooled cylinders, it adopts optimized water circulation cooling structure, which efficiently takes away engine heat during high-speed and long-time operation, avoiding overheating, power attenuation and cylinder burning.

The cylinder is made of high-strength cast iron liner with high hardness and ultra wear resistance, perfectly adapting to modified high-power operation. Precision machined 47mm bore size ensures accurate fit with matched piston, piston rings and full gaskets, maintaining excellent engine compression. This complete kit thoroughly solves common faults such as engine power shortage, oil burning, air leakage and overheating failure caused by aging original cylinders. It is the best choice for daily maintenance and displacement upgrade of SR series scooters.

Product Specifications

Key Features

• Professional water cooling circulation design, excellent heat dissipation, anti-overheating
• High-hardness cast iron cylinder liner, ultra wear-resistant for long high-load operation
• Precision 47mm big bore machining, effectively upgrade engine displacement and power
• Tight tolerance matching, stable compression, no air leakage or oil burning
• Complete supporting accessories, one-stop engine rebuild solution
• Perfect fit for SR50/SR70 water-cooled 2-stroke scooter engines
• Solves overheating and power drop issues for modified and daily riding