Honda CRF 250R (2004, 2005) Evolution Exhaust System

Honda CRF 250R (2004, 2005) Evolution Exhaust System

The Akrapovic EVOLUTION system for the Honda CRF 250R will satisfy the needs of all professional MX riders. It is designed to increase performance at the adrenaline-pumping top of the rpm range. The system also conforms to FIM regulations on exhaust system noise levels for MX competition. And of course it also conforms beautifully to the lines of the Honda. For 2005, the Honda delivers even more power than the 2004 model. PERFORMANCE Measurements of the Akrapovic EVOLUTION exhaust system on the HONDA CRF 250 R: Power: the power curve shows the character of the Akrapovic EVOLUTION system, with the greatest power increase coming in the range from 8000 rpm on, and extending into the overrev range, which will be very useful for experienced riders. Max. power of 33.6 HP is delivered way up at 11000 rpm. A power increase is also visible between 5400 and 7000 rpm, and from there to 8000 rpm the stock and Akrapovic curves more or less overlap. Torque: the torque curve is similar to the power curve, with the biggest increase coming at the top of the rpm range, and extending into the falling area of the curve. The range from 5400 and 7000 rpm is also better filled by the Akrapovic exhaust system than the torque delivered by the stock exhaust. CONFIGURATION max. rear wheel power HP / rpm (measured on SuperFlow Cyle Dyn) CONFIGURATION PERFORMANCE stock AKRAPOVIC max. increased power 32.4 / 10400 33.6 / 11000 1.2 / 11000 CONFIGURATION header tubes collector link pipe material TITANIUM - TITANIUM tube shape CONICAL - FLARED interference crossover tubes - lambda sensor - header tube inner sleeves STAINLESS STEEL header tube flanges LASER CUT S.S. header tubes - collector connection link pipe - muffler connection - WELDED collector / header tube - link pipe connection muffler inlet cap /outlet cap FREE FLOATING + SILICON SHILDED SPRING TITANIUM / TITANIUM muffler metal interior TITANIUM muffler outer sleeve TITANIUM muffler clamp 1x CARBON-FIBER OFF ROAD muffler bracket - noise damper - heat shield CARBON-FIBER OPTIONS link pipe noise damper muffler bracket heat shield Description Akrapovic EVOLUTION components (header tube, link pipe) are made of titanium elements. The header tube is conical, while the link pipe is flared. The components are attached with a free-floating joint secured with silicon-shielded tensioning springs. The muffler-link pipe joint is welded. The muffler is made entirely of titanium, and is attached to the frame using an Akrapovic Offroad carbon-fiber clamp. The Akrapovic EVOLUTION system also comes with a carbon-fiber heat shield. - - - - weight comparison (kg) noise measurements (db / rpm) possibility of periodic service without removing A.E.S. legal for street use stock 2.86 stock Technical specifications of Akrapovic exhaust systems and related products subject to change without notice. ADDITIONAL DATA AKRAPOVIC RACING EVOLUTION stock - RACING difference stock - EVOLUTION - 2.11-0.75 AKRAPOVIC 98 / 5500 98 / 5500 oil YES NO oil filter YES 2

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

Bike Photo 4

Bike Photo 5

101748 (P-HF2) CARBON-FIBER CLAMP FITTING PARTS 102535 (H-H2MET1) HEADER TUBE 102436 (P-43) INNER SLEEVE 102528 (P-F19) FLANGE Schematic 102234 (P-S2) SPRING 102122 (P-HF55) CAGE NUT 101960 (P-ST1AM) STICKER 102534 (M-TTH2M1) FULL TITANIUM MUFFLER 101650 (P-MCTM3) CARBON-FIBER CLAMP 101976 (P-KP1) ANTISEIZING GREASE 102541 (P-HSH2M1/A1) CARBON-FIBER HEAT SHIELD 6

32,5 30,0 27,5 STOCK EXHAUST AKRAPOVIC EVOLUTION EXHAUST Diagram / Chart 25 24 23 25,0 22 WhlPwr 22,5 21 EngTrq 20,0 20 17,5 15,0 12,5 5000 6000 7000 8000 9000 10000 11000 12000 13000 EngSpd RPM (Sorted) 19 18 17 7