Universal Parts Lower Starter Motor | 49cc - 125cc 4-Stroke

Restore reliable starting performance to your vehicle with this Universal Parts Lower Starter Motor . Designed as a direct replacement for horizontal 4-stroke engines found on youth dirt bikes, pit bikes, and ATVs, this unit drops in with factory bolt-hole spacing and delivers consistent cranking torque from the first turn of the key. Key Features Direct Replacement Layout: Form-fitted for lower-mount configurations where the starter mounts underneath the engine block/carburetor. 12-Tooth Drive Sprocket: Precision-machined gear ensures clean, positive engagement with your engine's starter chain or flywheel setup. Robust Internal Windings: High-grade copper coils and heavy-duty brushes deliver consistent cranking torque and dependable cold starts. Simple Bolt-On Installation: Built to factory sizing tolerances for a straightforward swap without modification to engine cases. Vehicle & Engine Compatibility Fits a wide variety of Chinese-manufactured off-road vehicles utilizing horizontal 4-stroke powertrains (lower-mount configuration only): Engine Displacement Common Applications 49cc / 50cc, 70cc / 90cc, 110cc / 125cc Select pit bikes, youth dirt bikes, go-karts, and ATVs from TaoTao , Coolster , SSR , Apollo , Roketa , and Kazuma Technical Specifications Mounting Position: Lower (underneath carburetor/crankcase) Bolt Hole Spacing: 68mm center-to-center Drive Gear Teeth: 12 Internal Splines: 22 Operating Voltage: 12V DC MPN: 877 Mechanic's Installation Tip: Before removing your old starter, disconnect the negative (-) battery terminal to eliminate short-circuit risk. Inspect your starter chain and tensioner for excessive slack or wear. Ensure the engine ground wire connection is clean and tightly secured — a loose or corroded ground is the leading cause of intermittent starting issues and low cranking power. CRITICAL FITMENT CHECK: Small 4-stroke engines use either an "Upper Mount" (above the cylinder) or a "Lower Mount" (underneath the crankcase) starter. This is a lower-mount unit. Physically verify your engine's mounting position and confirm the 68mm bolt-hole spacing before ordering. California Prop 65 Warning: www.p65warnings.ca.gov