Just about everything, following is some differences between the 450 SX and 450 EXC.
The EXC is a 6 speed with a dry weight of 252 lbs, compression of 11.9:1, electric start and is street legal.
The SX is a 4 speed with a dry weight of 231 lbs, compression of 12.5:1, kick start (09 450 is e-start I believe) and is not street legal.
the engine power and the seat height
Yes they just made it street legal because everyone was just converting them illegally anyways.
Got this off of KTM talk, 44HP for a 450 exc.
No, 93-97 ktm 250-360 exc will fit it, not much else. found out the hard way on my 96 ktm 360exc
The KTM 530 EXC is designed primarily for enduro racing and features a focus on lightweight performance and agility, making it suitable for a range of off-road conditions. In contrast, the KTM 530 EXC-R is a more refined version that typically includes additional features aimed at enhancing durability and comfort, such as a larger fuel tank and improved suspension settings. Both bikes share similar engine specifications, but the EXC-R may offer enhancements for more aggressive trail riding and competition use. Ultimately, the choice between the two depends on the rider's specific needs and preferences for off-road riding.
ask at a ktm shop
The 2004 ktm 450 EXC has 48Hp
im a 200 plus person and my 380 topped out at 98 and that was pushing it hard. That is all stock parts
Rent a Ktm Bike with endurobikes.co
The main difference between the KTM EXC and EXCF models lies in their engine types and intended use. The EXC models are typically two-stroke bikes, known for their lightweight and high-revving performance, making them suitable for enduro racing and technical trails. In contrast, the EXCF models are four-stroke bikes, offering more torque and stability, which makes them better suited for longer rides and varied terrain. Additionally, the EXCF models often include features that enhance comfort and versatility for longer-distance riding.
Stock 04 250 EXC has29 hp.
52