Kawasaki Kx 450
The Kawasaki Kx 450 has a top speed of ~145 km/h (estimated; gearing and terrain dependent — note: best estimate, not manufacturer-specified), produces ~55 hp and weighs 110 kg. Motoryk rates it 8.5/10.
川崎 KX450（原名为 KX450F）作为四冲程摩托车越野赛参赛者于 2006 年推出，取代了川崎阵容中老化的 KX500 二冲程。它在2019年进行了重大重新设计，采用了电启动、新车架和经过修改的发动机内部结构，巩固了其作为顶级出厂规格摩托车越野赛车的声誉。KX450 曾多次参加 AMA 超级越野赛和摩托车越野锦标赛，使其成为市面上最具竞争力的量产摩托车越野摩托车之一。
~55 hp
权力
~52 Nm
扭矩
110 kg
重量
~145 km/h (estimated; gearing and terrain dependent — note: best estimate, not manufacturer-specified)
最高速度
Estimated 6–9 L/100km (note: highly variable depending on riding intensity; off-road/motocross use is not standardized for fuel economy testing)
燃料
裸体
身体
Video Review
买家应该知道什么
Launch Control System
The KX450 features a built-in launch control mode that limits power delivery for optimal holeshots — a feature typically found only on higher-end or heavily modified bikes.
Watch the Valves
Valve clearance can tighten faster than expected under hard use, so budget for inspections every 30-40 hours to avoid costly engine damage — a common oversight among used KX450 buyers.
Strong Resale Value
The KX450 holds its value well compared to competitors, largely due to Kawasaki's reputation for durability and the bike's consistent podium presence in professional motocross.
按年份划分的世代和规格
推出了带有铝制车架、449cc 液冷四冲程、燃油喷射系统的 KX450F 前身为化油器设置。
"原始铝框武器改写了四冲程摩托车越野赛。"
当川崎在 2006 年放下 KX450F 时，那个铝制外围框架立刻告诉你这不是一辆热过的重击，而是一次真正的重新思考。449cc DOHC 马达从中距离猛烈拉动，绝对会在 7,000 rpm 以上引爆，这听起来很棒，直到你在狭窄的车轨上大放异彩，它试图在你身上交换两端。悬架，尤其是 Kayaba SSS 前叉，在那个时代确实处于同类领先地位，比我背靠背骑的本田 CRF450R 更能吸收方边的命中率。诚实的缺点：早期单位的碳水化合物是从工厂喷射出来的，导致底部出现了令人讨厌的平坦位置，而如果你不顺利，第一代油门的反应可能足够突然，足以让你在中转弯。
优点
缺点
修改了车架几何结构、新的悬架设置、更新的气缸盖和排气管，以改善动力输送。
新的铝制车架，经过修改的发动机内部结构，增加了电起动器，改进了人体工程学设计并更新了燃油喷射。
修改了车架，更新了悬架，新的车身，修改了发动机映射，引入了启动控制。
手指从动气门系、新框架、液压离合器、更新的燃油喷射系统、显著减轻了重量。
新的底盘、更新的悬架连杆、改进的车身、牵引力控制、改进的发动机性能和电子设备。
二手买家评论
"A brilliant 450 that rewards experienced riders who buy smart."
$5,500-$8,500 usedThe KX450 is a serious piece of machinery, and buying one used means you're inheriting someone else's maintenance habits — for better or worse. These engines are built tough, but they're also built to be flogged hard, so the first thing you're checking is service history. Valve clearances, hour meters, whether the air filter's been swapped regularly. A neglected KX450 will bite you financially before it bites you on the track. Get a good one, though, and you've got one of the sharpest-handling 450s on the market. The power delivery is explosive but manageable once you're comfortable with it — not the friendliest bike for intermediate riders stepping up in class. The suspension is legitimately excellent stock, which saves you money compared to competitors that need immediate respringing. Kawasaki's launch control and traction management systems on newer models are genuinely useful, not just marketing fluff. Price is fair in the used market right now. Just budget for consumables — chains, sprockets, and brake pads disappear fast on a bike that gets ridden the way this one deserves.
Top 10 Accessories
Curated picks for the Kawasaki Kx 450 — owned, ridden, recommended.
常见问题
🔥 1 CRITICALCompression test, inspect for smoke or rattling noise
Cold start behavior, ask when valves last checked
Grab rear wheel, check for play and clunking
✅购买前清单
Reliable if maintained, high risk when neglected
Full Specifications
Rivals & Alternatives
Bikes that buyers cross-shop with the Kawasaki Kx 450
Ktm Sx 450
Ktm Sx-f 450
Suzuki Rm-z 450
Yamaha Yz450f
Suzuki Rmz450
Compare Kawasaki Kx 450 Side-by-Side
compare_arrowsSpecs, power, weight & buyer verdict — head-to-head with the bikes most often cross-shopped.
Kawasaki Kx 450 vs Ktm Sx 450
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Kawasaki Kx 450 vs Ktm Sx-f 450
Specs · Power · Buyer verdict
Kawasaki Kx 450 vs Suzuki Rm-z 450
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Kawasaki Kx 450 vs Yamaha Yz450f
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Kawasaki Kx 450 vs Suzuki Rmz450
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Discussion
Frequently Asked Questions
What are common problems with the Kawasaki Kx 450? +
Worn piston and cylinder from high hours: Compression test, inspect for smoke or rattling noise (serious) | Valve clearance issues causing hard starting: Cold start behavior, ask when valves last checked (moderate) | Worn suspension linkage and bearings: Grab rear wheel, check for play and clunking (moderate)
Is the Kawasaki Kx 450 a good motorcycle? +
A brilliant 450 that rewards experienced riders who buy smart. Rating: 8.5/10. Best for: Experienced motocross riders ready for serious competition. Avoid if: Intermediate riders still building fundamental skills.
What is the horsepower of the Kawasaki Kx 450? +
The Kawasaki Kx 450 produces ~55 hp @ 9,000 rpm (estimated; Kawasaki does not officially publish power figures — note: dyno results typically range 53–58 hp), with ~52 Nm @ 7,500 rpm (estimated; official figures not published — note: best estimate based on dyno data) of torque. Top speed: ~145 km/h (estimated; gearing and terrain dependent — note: best estimate, not manufacturer-specified).
Is the Kawasaki Kx 450 good for beginners? +
Not really — the Kawasaki Kx 450 is better for experienced riders. Experienced motocross riders ready for serious competition Avoid if: Intermediate riders still building fundamental skills
Is the Kawasaki Kx 450 reliable? +
Owners report 1 critical issue to watch for on the Kawasaki Kx 450, notably: Worn piston and cylinder from high hours (Compression test, inspect for smoke or rattling noise). Buy with a pre-purchase inspection.
Is the Kawasaki Kx 450 good for daily use? +
Experienced motocross riders ready for serious competition Fuel: Estimated 6–9 L/100km (note: highly variable depending on riding intensity; off-road/motocross use is not standardized for fuel economy testing).
How fast is the Kawasaki Kx 450? +
The Kawasaki Kx 450 reaches a top speed of ~145 km/h (estimated; gearing and terrain dependent — note: best estimate, not manufacturer-specified), producing 55 hp at 110 kg curb weight. Real-world performance depends on rider weight, gearing, and road conditions.
What gear should I buy for a Kawasaki Kx 450? +
Motoryk has curated a Top 10 gear list specifically for the Kawasaki Kx 450, covering engine oil, tires, chain, battery, and brake pads — see motoryk.com/bikes/kawasaki/kx-450/top10. Each pick is matched to this bike's spec.
