HONDA CRF 250R (2008-2009)
DESCRIPTION The Akrapovic Racing and Evolution complete exhaust systems are the flagships of our product lines. They are designed for competition-oriented MX riders who demand maximum performance from their exhaust systems. With their production quality, engine performance improvements and modern Hexagonal muffler design they satisfy the requirements of all riders. The systems are designed for two markets; in the US they are available with an approved spark arrester, and for the EU and other non-us markets they come with a noise damper. New for 2008 is additional chamber that helps to reduce noise emission and provides better power and torque at low rpm range. max. rear wheel power HP / rpm (measured on Dynojet ATV) CONFIGURA- TION PERFORMANCE stock AKRAPOVIC max. increased power 34.3 \ 11170 36.2 \ 12100 2.4 \ 12150 CONFIGURATION header tubes collector link pipe PERFORMANCE Measurements of the Akrapovic EVOLUTION system on the HONDA CRF 250R (without muffler inserts): Power & Torque: The Akrapovic Evolution and Racing systems deliver a performance increase throughout the entire rpm range. It is most pronounced in the bottom and the top of the range. The systems deliver increased torque similar to the power increase. Max. increased power of 2.4 HP was measured at 12150 rpm, while max. power of 36.2 HP was measured at 12100 rpm. CONFIGURATION The twin-pipe Akrapovic Evolution system uses titanium tubing and the twin-pipe Akrapovic Racing uses stainless steel tubing. The tubes for the header assembly are flared to provide improved exhaust gas flow. The systems individual components - header tubes, collectors and link pipes - are attached using sleeve joints held together with siliconshielded springs. The link pipes, which are welded to the mufflers, are extremely short. This system includes pair of HEXAGONAL mufflers. The mufflers have in case of Evolution titanium inlet caps and perforated inner sleeves, in case of Racing stainless steel inlet caps and perforated inner sleeves. The outlet cap is made of carbon-fiber for evolution and composite polymer for Racing system. The outer sleeves are made of titanium for the Racing version. For the Evolution both options of the outer sleeve are available - carbon-fiber and titanium. The mufflers are attached to the frame using Akrapovic offroad carbon-fiber clamps. Evolution system also includes a carbon-fiber heat shield. material TITANIUM / STAINLESS STEEL/ interference crossover tubes NO (CHAMBER) lambda sensor NO header tube inner sleeves S.S. CNC machined header tube flanges S.S. laser cut header tubes - collector connection link pipe - muffler connection muffler metal interior - WELDED TITANIUM / STAINLESS STEEL collector / header tube - link pipe connection muffler inlet cap /outlet cap muffler outer sleeve SLEEVE JOINT + SILICON SHIELDED SPRING Ti - composite polymer \ S.S. - Carb TITANIUM or CARBON \ TITANIUM muffler clamp CARBON-FIBER OFF ROAD muffler bracket - muffler insert EU - heat shield Carbon-fiber US - catalytic converter NO - TITANIUM / STAINLESS STEEL/ tube shape CONICAL - CONICAL weight comparison (kg) noise measurements (db / rpm) possibility of periodic service without removing A.E.S. stock 4.13 stock ADDITIONAL DATA AKRAPOVIC difference racing evolution stock - racing stock - evolution 3.00 2.6 1.13 1.53 AKRAPOVIC 94 / 5000 94 / 5000 oil YES oil filter YES legal for street use NO Technical specifications of Akrapovic exhaust systems and related products subject to change without notice.
EXHAUST PHOTO
BIKE PHOTO
BIKE PHOTO
SHEMATIC HONDA CRF 250 R Complete exhaust system/racing line S-H2MR6-VT P-F19 FLANGE P-43 INNER SLEEVE P-HF125 FITTING KIT P-S2 SPRING P-MCTV2 CARBON FIBER MUFFLER CLAMP LEFT M-V00202TL TITANIUM MUFFLER LEFT L-H2MR5 LINK PIPE V-EC57 END CAP SET H-H2MR5 HEADER TUBE P-VST3PO STICKER P-HF125 FITTING KIT V-EC58 END CAP SET MUFFLER REPAIR KITS REPACK P-RPCK24 M-V00202TR TITANIUM MUFFLER RIGHT P-MCTV1 CARBON FIBER MUFFLER CLAMP RIGHT P-HSK2M1 CARBON-FIBER HEAT SHIELD SLEEVE P-RKS83VT26
SHEMATIC HONDA CRF 250 R Complete exhaust system / Evolution line S-H2MET6T-VT P-F19 FLANGE P-43 INNER SLEEVE P-HF125 FITTING KIT P-S2 SPRING P-MCTV2 CARBON FIBER MUFFLER CLAMP LEFT M-V00205TL TITANIUM MUFFLER LEFT L-H2MET5T LINK PIPE V-EC57 END CAP SET H-H2MET5 HEADER TUBE P-VST3PO STICKER P-HF125 FITTING KIT V-EC58 END CAP SET M-V00205TR TITANIUM MUFFLER RIGHT MUFFLER REPAIR KITS P-MCTV1 CARBON FIBER MUFFLER CLAMP RIGHT P-HSK2M1 CARBON-FIBER HEAT SHIELD REPACK SLEEVE P-RPCK24 P-RKS83VT26
DIAGRAM / CHART STOCK EXHAUST AKRAPOVIC COMPLETE TWIN EXHAUST 35 25 24 30 23 WhlPwr 25 20 22 21 20 19 EngTrq 15 18 17 5000 6000 7000 8000 9000 10000 11000 12000 13000 EngSpd RPM