Onour rear-wheel dyno, the KTM 450 SX-F produced 54.8 hp at 9,500 rpm and 34.6 pound-feet of torque at 7,400 rpm—impressive numbers to carry its light, CW-measured 234 pounds around the track. Adjustthe clearances of each valve to the recommended manufacturer specifications. When tightening the locknut, be sure to hold the screw with a screw driver at the same, applying slight anti-clockwise pressure to allow for a little tightening due to the locknut. Once the locknut is tight, check the clearance again to make sure. 479 Location: Finland. 2007 exc and 2008 exc, same price an so on, I'd seriously think of taking the older one. Not that the new engine is bad, but the old is superb in terms of reliability. If it is used for adventure riding and not for serious racing I think the older ktm's are very hard to beat. #11. Thehigher compression makes for a more explosive power band or bigger "hit" This is better for racing mx/motoard. 540 kit 97mm piston (actually 530cc) factory kit (list $890) or aftermarket piston (:1 pistons) and overbore cylinder ($450) 550 kit (543cc) 98mm piston and sleeved/plated cylinder (available in 11:1 or 13:1 compression) Greetingsto all, Recently i experienced the weirdest issue while riding my 2006 KTM 450 exc, the bike started as normal the morning of the ride , 3 miles from where i left the bike bogged down when given the slightest throttle.It starts right up but will literally sound like it wants to die when applying throttle. Excellentbike, by that year all the issues were long worked out and the engine is bullet proof. If you have a rad fan the only other thing I would ride for slow KTM450 SMR Drivetrain. - Competition-proven 450 cc single-cylinder engine- SuperMoto-tuned gearbox- Engine maps tailored for each gear- Traction and launch control. The beating heart is the real The2006 and 2007 are very close to the same bike, xcw has allot less wires and a 2007 will typically sell for a little more all else being the same. Between those 2 bikes I'd pick the one that is in the best condition while considering the difference in the 450 vs 525s power delivery. #9. KTMs simple strategy: Take last year’s off-road-only 450 EXC, which won Best Enduro in CW’s Ten Best Bikes balloting, and make it street-legal. This is what 2024KTM 450 SX-F First Ride Review. Tests. 2024 Husqvarna FC 450 First Ride Review. Racing. 2024 Triumph Racing SuperMotocross (SMX) Team First Look. Racing. 2024 BarX Suzuki SuperMotocross Team 0Qjx2.