![]() The Rato CG250 engine uses rocker arm of cast iron and tappet of aluminum alloy capacitance discharge ignition system and electric. For smaller upgrades replace the stock air filter with a Performance Air Filter for this engine. The Rato CG250 (RW167FMM) is a 229.2 ml (13.9 cu-in) single-cylinder air-cooled 4-stroke internal combustion vertical motorcycle engine from Rato CG-series, manufactured by Chongqing RATO Holding (Group) CO., LTD. Mechanics Note: If you increase the size of your stock carb jet you will want to improve your air flow both in and out of the engine. These are pretty easy to replace and a must if you want to upgrade your engine's performance with performance parts or upgrades. ![]() This is a Carburetor Pilot Idle Jet #40 for the CN250 CF250 GY6 250 172MM engine. This is a Carburetor Idle Jet #36 for the CN250 CF250 GY6 250 172MM engine. This is a Carburetor Idle Jet #35 for the CN250 CF250 GY6 250 172MM engine. If you don't your engine can sieze on you. If it is 50 degrees colder you would increase your jet size at least one step up. When the air is colder it requires bigger jets because cold air is more dense. You will want to go down one (1) jet size for every 1750' to 2000' you go up in elevation. At 4000' feet you will have lost about 12% of your power output. CG 250cc PISTON SET FOR 170FMM HONDA DIRT BIKE AND HONDA CLONES : Clutch Assembly 6 column / 7plates for Honda clone CG250cc : Flywheel / Magneto Rotor for CG150cc -250cc ATV, Dirt Bike & Go : 19.95. You will loose about 3% in power for every 1000' in elevation. Motorcycle Cylinder Kit Piston Gasket Kit Set Suitable for Honda CG150 CG175 CG200 CG250 refitted enlarged cylinder. When you are dealing with elevation you will want to rejet to prevent your engine from siezing and requiring a rebuild. 67MM Big Bore Refitted Water Cooled Cylinder Set Piston Ring Top Engine Parts Gasket Kits For Honda CG250 250cc CG 250. If you upgrade beyond small adjustments you will want to install a Performance Exhaust to handle the increased combustion and minimize back flow issues.Īltitude can play an issue in scooter performance. For smaller upgrades replace the stock air filter with a Performance Air Filter for this engine. This is a Carburetor Idle Jet #34 for the CN250 CF250 GY6 250 172MM engine.
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