Type: Single cylinder, 4-stroke with air-cooled, and clutch operated by hand. Bore×Stroke: 52.4×55.5 mm. Compression Ratio: 9.0:1. Max Power: 6.5 kW/7500r/min±375r/min.Rated Power: 5.6 kW/7500r/min±375r/min. Max Torque: 8.0 Nm/5000r/min±250r/min. Primary Reduction Ratio:3.722. Gear Ratio:2.833/1.706/1.238/0.958. Lubricant: SAE15W/40-SE, 4-stroke gasoline engine oil. · For HONDA CRF50 / CRF70 / XR50 / XR70 / Z50 / Z50R / CT70 Mini Trail / Z50 / Minitrail Monkey / XL70 ST70 / QA50 / QR50 / CL70 / SL70 / 70 Passport / ST 90K2 / ST 90K1 / CS 90 / SL 90 / ZB 50 /. · Please note this is not a guarantee, if you are unsure, please ask your local dealer. Feedback is very important to us. It is impossible to address issues if we do not know about them! Faction is our ultimate goal. We work hard to earn your trust and future business. A If you receive a defective item, you may return it or ask for a discount. Due to time zones, our reply to your questions may not be immediately. If it's non-workdays, please kindly be patient and wait till Monday. The item "4Stroke CDI Motor Engine Pit Dirt Bike For Honda CRF50 Z50 125cc Single Cylinder" is in sale since Saturday, March 20, 2021. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Engines & Engine Parts\Complete Engines". The seller is "szmarket2018" and is located in Rowland Heights, California. This item can be shipped to United States.