Ktm Sx 250
The Ktm Sx 250 has a top speed of Approx. 110–120 km/h (note: estimate; top speed is limited in motocross use and varies by gearing), produces Approx. 46–49 hp and weighs Approx. 102 kg. Motoryk rates it 8.5/10.
KTM 250 SXは、1990年代初頭からKTMのオフロードラインナップの基礎となってきた2ストロークのモトクロスバイクで、数十年にわたるファクトリーレースの開発を通じて継続的に進化してきました。モトクロス世界選手権での数々の優勝を通じて大きな信頼を獲得し、そのパワーデリバリーとハンドリングで250ccの2ストロークモトクロスクラスのベンチマークとなりました。このモデルは、アグレッシブなパワー特性と軽量シャシーでアマチュアライダーとプロライダーの間でよく知られており、4ストロークが主流になりつつある時代においても、2ストロークモトクロスの伝統を守り続けています。
Approx. 46–49 hp
パワー
Approx. 42–45 Nm
トルク
Approx. 102 kg
ウェイト
Approx. 110–120 km/h (note: estimate; top speed is limited in motocross use and varies by gearing)
トップスピード
Estimated 6–9 L/100km depending on riding intensity (note: highly variable in off-road/motocross use)
燃料
裸
ボディ
Video Review
購入者が知っておくべきこと
High Maintenance Demands
The KTM SX 250 is a high-performance 2-stroke that requires top-end rebuilds every 25-40 hours of riding. Always ask the seller for a maintenance log and when the last piston/ring replacement was done.
Strong Resale Value
KTM SX models hold their value well compared to Japanese competitors, often retaining 70-80% of market value after one season if properly maintained. Orange bikes have a loyal buyer base that keeps demand high.
Watch the Power Valve
The BOING power valve system is a known wear point — a sticky or dirty power valve causes noticeable power loss and flat mid-range response. Budget for cleaning or replacement if buying used.
中古購入者レビュー
"A brilliant, brutal machine that rewards preparation and punishes neglect."
$3,500-$6,500 usedThe KTM 250 SX is a proper weapon — KTM's two-stroke motocross flagship hasn't changed its aggressive personality across generations. That's exactly the problem and the appeal. Buy a neglected one and you're inheriting someone else's mechanical disaster; buy a well-kept example and you've got one of the sharpest 250s ever bolted together. The WP suspension is genuinely excellent when serviced, and that Kokusan-ignitioned motor rips with an urgency that'll embarrass plenty of 450s through the mid-range. It's addictive. Here's the honest part: two-strokes demand maintenance discipline. Check the powervalve — they gum up and owners ignore them. Pull the pipe and inspect the piston before handing over cash. Top-end rebuilds are cheap if you do them yourself, expensive if you've been neglecting intervals. Anything post-2019 benefits from the revised frame geometry, which calmed the notoriously twitchy handling without killing the fun. Under $4,000 you're gambling; spend a bit more for a documented, recent-season bike.
Top 10 Accessories
Curated picks for the Ktm Sx 250 — owned, ridden, recommended.
よくある問題
🔥 2 CRITICALCompression test, pull plug, look for scoring
Inspect reeds for cracks or warping visually
Remove cover, check valve moves freely by hand
Run through all gears, listen for grinding or jumping
✅購入前チェックリスト
Reliable if maintained, expensive when neglected
Full Specifications
Rivals & Alternatives
Bikes that buyers cross-shop with the Ktm Sx 250
Kawasaki Kx 250
Suzuki Rm-z250
Husqvarna Te 300
Gas Gas Ec 300
Gas Gas Ec 250
Compare Ktm Sx 250 Side-by-Side
compare_arrowsSpecs, power, weight & buyer verdict — head-to-head with the bikes most often cross-shopped.
Ktm Sx 250 vs Kawasaki Kx 250
Specs · Power · Buyer verdict
Ktm Sx 250 vs Suzuki Rm-z250
Specs · Power · Buyer verdict
Ktm Sx 250 vs Husqvarna Te 300
Specs · Power · Buyer verdict
Ktm Sx 250 vs Gas Gas Ec 300
Specs · Power · Buyer verdict
Ktm Sx 250 vs Gas Gas Ec 250
Specs · Power · Buyer verdict
More Ktm Sx 250 Guides
More from Ktm
View all Ktm models →Community Reviews
Discussion
Frequently Asked Questions
What are common problems with the Ktm Sx 250? +
Worn or seized top end (piston/rings): Compression test, pull plug, look for scoring (serious) | Reed valve wear causes poor low-end power: Inspect reeds for cracks or warping visually (moderate) | Power valve stuck or carboned up: Remove cover, check valve moves freely by hand (moderate)
Is the Ktm Sx 250 a good motorcycle? +
A brilliant, brutal machine that rewards preparation and punishes neglect. Rating: 8.5/10. Best for: Experienced mx riders wanting serious competitive edge. Avoid if: You want low-maintenance weekend trail riding.
What is the horsepower of the Ktm Sx 250? +
The Ktm Sx 250 produces Approx. 46–49 hp @ 9,000–10,000 rpm (note: estimate based on recent model years; KTM does not always publish official figures), with Approx. 42–45 Nm @ 8,000–9,000 rpm (note: estimate; official figures not consistently published) of torque. Top speed: Approx. 110–120 km/h (note: estimate; top speed is limited in motocross use and varies by gearing).
Is the Ktm Sx 250 good for beginners? +
Not really — the Ktm Sx 250 is better for experienced riders. Experienced mx riders wanting serious competitive edge Avoid if: You want low-maintenance weekend trail riding
Is the Ktm Sx 250 reliable? +
Owners report 2 critical issues to watch for on the Ktm Sx 250, notably: Worn or seized top end (piston/rings) (Compression test, pull plug, look for scoring). Buy with a pre-purchase inspection.
Is the Ktm Sx 250 good for daily use? +
Experienced mx riders wanting serious competitive edge Fuel: Estimated 6–9 L/100km depending on riding intensity (note: highly variable in off-road/motocross use).
How fast is the Ktm Sx 250? +
The Ktm Sx 250 reaches a top speed of Approx. 110–120 km/h (note: estimate; top speed is limited in motocross use and varies by gearing). Real-world performance depends on rider weight, gearing, and road conditions.
What gear should I buy for a Ktm Sx 250? +
Motoryk has curated a Top 10 gear list specifically for the Ktm Sx 250, covering engine oil, tires, chain, battery, and brake pads — see motoryk.com/bikes/ktm/sx-250/top10. Each pick is matched to this bike's spec.
