2011 KTM SX 350 F, This lightweight yet powerful 4 stroke can hang with the 450s and handle like the 250s!!2011 KTM 350 SX-F It was engineered to attract both racers and recreational dirt bike riders seeking a happy-medium between the agility and high-revving performance of a 250F and the brute power and versatility of a 450F. After spending a day at the controls of it at Southern California s fabulous Pala Raceway, we are impressed with the hybrid qualities of this unique off-road motorcycle. ENGINE As the nomenclature implies, the 350 SX-F uses a liquid-cooled 4-stroke single-cylinder engine. The piston slides 57.5mm inside the 88.0mm cylinder bore which equates to exactly 349.7cc of combustion volume placing it right in between that of a 250F and 450F machines. Fuel is compressed to a ratio of 13.5:1, which is the highest measurement of any KTM off-road bike and signifies the potential VideosOur Sponsor 2011 KTM 350 SX-F First Ride Video Click to view video Watch the the 350 SX-F in action as we tear it up at Pala Raceway in our 2011 KTM 350 SX-F First Ride Video. for serious engine performance across its 13,000-rpm rev range. Other hot-rod techniques include the dual camshafts driving the four titanium valve-equipped cylinder head. Similar to the 250 SX-F, the 350 uses a dual-pump engine lubrication system. It also employs a balance shaft which acts as a water pump and camshaft drive thereby reducing engine vibration while helping to maintain petite engine dimensions. Also shared between models is the Keihin electronic fuel-injection system. The system makes use of a single fuel injector that sprays into a 42mm throttle body. There is no fast idle or choke/cold-start knob and the system automatically meters fuel/air ratio based on atmospheric conditions. Spent fuel is passed through a stainless-steel header (without a head pipe-mounted external resonator) and a long aluminum muffler. 2011 KTM 350 SX-F First Ride The 350 SX-F features a liquid-cooled 4-stroke 349.7cc single with a 88 X 57.5mm bore/stroke and the highest compression ratio amongst KTM off-roaders at 13.5:1. The FI system is powered directly by the AC generator and capacitor (attached to the throttle body). As soon as the battery-powered starter button is pressed enough electricity is generated to power the fuel-injection system. While there isn t a conventional kick start lever, it is available as a PowerPart accessory, though we wonder why you d ever consider its fitment with the convenience of a handlebar-mounted push button electric start. Additional PowerPart accessories come in the form of a Map Select Switch and User Setting Tool that allow the rider to adjust engine mapping on the fly with the handlebar-mounted Map Select Switch a first for the motocross bike world or with your computer via the User Setting Tool. Power is transmitted to the 110-series Bridgestone M70 rear tire t
