Honda CRF 450 R (2003) Evolution Exhaust System

Honda CRF 450 R (2003) Evolution Exhaust System

Akrapovic Evolution Exhaust System The Honda CRF 450R is a well-tested mud-lover. Its characteristic street-bike style aluminum frame makes it a one-of-a-kind among motocross bikes. The 2003 model also features this frame, along with a host of improvements over previous models which will be enthusiastically received by riders. With all of its new features, the 2003 Honda CRF 450R has kept right up with the strong competition in its bracket. GOAL Since we already developed an Akrapovic EVOLUTION exhaust system for the 2002 model, it was a logical consequence that the 2003 model would find its way into our development department. The Akrapovic EVOLUTION system for the 2003 Honda CRF 450R is a product which adds even more to the performance package of this bike. With this system you will show your appreciation for the quality and potential of this high-tech machine. ABOUT AKRAPOVIC EVOLUTION SYSTEMS The Akrapovic EVOLUTION system sits at the very top of our product range. As the flagship of the Akrapovic line it appears in both the Road and Offroad series. The EVOLUTION system from the Offroad series differs from the Road version primarily in its exterior appearance, while the use of materials and technology are essentially identical. The use of lightweight exotic titanium and the principle of conical tubing are the basic characteristics of EVOLUTION systems. And of course the popular EVO also sits at the top of our performance range. The main difference is the shape of the muffler, which was specially designed for off-road motorcycles. The Akrapovic sticker, which displays the origin of the exhaust system, is also different for the Offroad series. In order to satisfy the specific demands of off-road conditions, the muffler is made entirely of titanium and designed to be as lightweight and compact as possible. The attachment of the muffler to the bike is performed with the help of an Akrapovic carbon-fiber muffler clamp, which is double-strength i.e. wider for the Offroad series. The header assembly is also made entirely of titanium. The header tubes are conical, as is the link pipe, as is characteristic of EVOLUTION line systems. The link pipe is welded to the muffler, while it is connected to the header tube with a free-floating connection secured with a high-quality silicon-shielded tensioning spring. weight comparison stock AKRAPOVIC difference 3.25 kg S.S. titanium stock - S.S. stock - titanium - 2.56 kg - 0.69 kg max. rear wheel power 48.3 HP / 8400 RPM 49.6 HP / 9260 RPM 3.3 HP / 10000 RPM* noise measurment 98 db / 4500 RPM 98 db / 4500 RPM 0 db / 4500 RPM legal for street use *MAXIMUM MEASURED POWER DIFFERENCE NO NOTE: the instructions must be followed during installation (the fitting for attaching the spring must be mounted correctly due to the position of the spring. Attention must also be paid to the set-up of the link-pipe bracket, and the proper installation and set-up of the clamp with the washer and rubber damper). Measurements of the Akrapovic EVOLUTION system on the Honda CRF 450R: power growth in the high end of the rpm range and a straight curve for acceleration and increased power are what you can expect from the EVOLUTION system for the Honda CRF 450R. The motor does not have less power between 5000 and 7000 rpm with the use of our system as it seems from a quick glance at the chart, but puts out exactly the same amount of power at slightly higher revs. The stock system gives you the same power at ca. 200 rpm lower than with our exhaust. After that it s a different story. From 7000 rpm on the Akrapovic EVOLUTION system comes into its own. The huge jump over the stock power and the wide power band at the top of the range will convince all doubters. Maximum horsepower of 49.6 HP is reached at 9260 rpm, while max. increased power of 3.3 HP is delivered at 10000 rpm. torque below 5000 rpm the torque receives an explosive increase with our exhaust system, followed by a slight drop in comparison to the stock system. At most 500 rpm more is required to obtain the equivalent torque. From 7000 rpm on the Akrapovic EVOLUTION system delivers an increase in torque simultaneously with the boost in power. It should be emphasized that the delivery of torque is essentially linear from 5000 rpm right to the top of the torque curve at 7500 rpm. The aluminum frame of the Honda CRF 450R goes extremely well with the titanium construction of the Akrapovic EVOLUTION system. It makes for an interesting aesthetic set-up, which in combination with the huge stocks of performance on tap offers a great amount of pleasure while riding. To make the package complete, there is the unmistakable sound of the free flowing exhaust gases from the Honda one-banger. Technical specifications of Akrapovic exhaust systems and related products subject to change without notice. NOTE: The Akrapovic EVOLUTION exhaust system for the HONDA CRF 450 R 2003 conforms to motocross regulations on the noise levels of exhaust systems and is therefore intended for motocross use. It is also intended for SUPERMOTO competition under the condition that it conforms to the requirements for exhaust system noise levels given in the SUPERMOTO regulations for a particular race. For the US market systems come with an approved spark arrester, which is also laser engraved on the muffler. Description 2

Exhaust Photo ANTI-SEIZING GREASE CARBON-FIBER MUFFLER CLAMP 3

Bike Photo 4

Bike Photo 5

P-MCTM3 CARBON FIBER CLAMP P-HF2 HANGING FITTING ASSEMBLY P-S1 SPRING Schematic P-33 INNER SLEEVE P-HF21 HANGING FITTING ASSEMBLY P-ST2AM STICKER M-TTH4M2 FULL TITANIUM MUFFLER P-KP1 ANTISEIZING GREASE P-F6 FLANGE H-H4MET2 HEADER TUBE Product code: 6

101650 (P-MCTM3) CARBON-FIBER CLAMP 104419 (P-SA010) SPARK ARESSTER 101748 (P-HF2) HANGING FITTING ASSEMBLY Schematic 101935 (P-S1) SPRING 101925 (P-33) INNER SLEEVE 101961 (P-ST2AM) STICKER 104001 (M-TTH4M3A) FULL TITANIUM MUFFLER 101873 (P-F6) FLANGE 101976 (P-KP1) ANTISEIZING GREASE 101733 (P-HF21) HANGING FITTING ASSEMBLY 101078 (H-H4MET2) HEADER TUBE Product code: 7

50 45 AKRAPOVIC EVOLUTION EXHAUST STOCK EXHAUST Diagram / Chart 45.0 42.5 40 40.0 WhlPwr 35 30 37.5 35.0 EngTrq 25 20 5000 6000 7000 8000 9000 10000 11000 EngSpd RPM 32.5 30.0 27.5 8