The is a staple in the world of 250cc twin-cylinder motorcycles, famously known as the Chinese-manufactured "clone" of the legendary Honda Rebel 250 (MC13E) engine. This parallel-twin engine powers a vast array of popular cruisers and commuters, including models from Lifan , Kinroad , Keeway , and GPX .
Inline 2-cylinder, 4-stroke, air-cooled (or liquid-cooled in some variants). Displacement: ~233cc to 250cc. Compression Ratio: Typically 9.2:1 to 10.8:1. CDI (Capacitor Discharge Ignition). Electric and/or Kick start. 2. Core Maintenance Schedule
Typically carbureted (PZ30 Keihin or similar), though modern variants may use EFI. Weight: Approximately 40kg (net). Essential Maintenance Schedule 253fmm service manual
Since this engine is a direct descendant of the Honda Rebel 250, the Honda CMX250 Service Manual
Because this engine is used by many brands, you can often find the applicable service manual by searching for "Honda CMX250 Service Manual" (as the 253FMM is a direct clone) or through specific Chinese manufacturer portals like for related vehicle types. like valve clearance or a wiring diagram for a particular bike model? terrain vehicle atv-22 250cc - Scooter Dynasty The is a staple in the world of
To ensure longevity, the manual outlines critical service intervals: Engine Oil Change: Every 500 km (initial) to 2,500 km depending on usage. Valve Clearance Adjustment:
Below is a drafted feature overview based on standard service manual requirements for this engine type. Displacement: ~233cc to 250cc
| Specification | Value | | --- | --- | | | Single Cylinder, 4-Stroke, OHV | | Bore x Stroke | 72mm x 72mm | | Displacement | 249.6cc | | Compression Ratio | 9.0:1 (Standard) | | Spark Plug | NGK D8EA or Denso X24ES-U (Gap: 0.6-0.7mm) | | Idle Speed | 1400 RPM +/- 100 | | Oil Capacity | 1.3 Liters (with filter change) | | Valve Clearance (Cold) | IN: 0.06mm, EX: 0.08mm | | Primary Drive Ratio | 4.055 (73/18) |