How much oil should be added to the front suspension of CFMOTO 650MT?
2 Answers
The front suspension of CFMOTO 650MT requires 150 milliliters of oil. How to choose suspension oil: Motorcycle suspension oil should not only have good temperature adaptability and a high viscosity index but also a low freezing point. For motorcycle suspension oil used in China, the freezing point should not be lower than 40. Within the operating range of the motorcycle suspension, the oil should have minimal vaporization loss. When the suspension oil comes into contact with air, it must possess oxidation stability and resistance to oil-air mixing. The suspension oil must remain absolutely clean, free from dust and impurities. Replacing suspension oil: For motorcycle hydraulic suspensions, it is essential to regularly check for oil leaks and ensure the suspension oil is sufficient. The oil should also be replaced periodically, generally once a year. Before replacing the suspension oil, follow the sequence to remove the handlebars, front wheel, fender, and brake caliper. Loosen the fixing screws on the upper triple clamp and steering stem, then move the fork tubes back and forth before slowly pulling them out. For motorcycles equipped with front fork dust covers, first remove the dust cover and front fork cover bolts, taking care to prevent the bolts from springing out due to the spring's force, which could cause accidents. If dealing with an air-pressurized suspension, before loosening the bolts, press the valve core by hand to release the air inside, then remove the spring washer, spring guide, front fork spring, and move the fork tubes. Finally, pour out the old suspension oil from the front fork, add new oil as specified, and move the fork tubes up and down several times to expel any air mixed into the suspension. Finally, reassemble all parts in order.
I just changed the front fork oil on my CFMoto 650MT, and it felt quite straightforward but required attention to detail. The manufacturer recommends adding about 180ml of specialized fork oil per fork, preferably SAE 10W type. I did it myself—first bought a bottle of Motul fork oil from the bike shop, measured it precisely with a measuring cup, avoiding overfilling or underfilling. Too much oil makes the suspension stiffer, leading to a rough ride, while too little weakens damping and causes instability at high speeds. The steps involve disassembling the fork leg, draining the old oil completely, cleaning the interior, and then slowly injecting new oil with a syringe. Remember to wear gloves to stay clean, and after filling, check the seals for leaks. The precise 180ml per fork is crucial for handling balance, and after refilling, the test ride felt noticeably smoother. It’s cost-effective and convenient—the oil itself isn’t expensive. If you plan to do this, don’t forget to check the owner’s manual for year-specific details.
