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30 August 2010
Bernhard Misses First Place by Only a Second:
It’s been a long wait, but Porsche factory driver ... >>
24 August 2010
Capirossi and Bautista Visit Akrapovic:
After their demanding racing weekend in Brno, both... >>
RACING & EVOLUTION EXHAUST SYSTEM for the YAMAHA WR 450 F (2007)
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The Akrapovic Racing and Evolution Exhaust Systems with their titanium oval mufflers are top of the line products for this motorcycle. They differ only in their selection of tubing material: the Racing uses stainless steel, and the Evolution uses titanium. The increases in power and torque can be clearly seen from dyno measurements and felt while offroad riding. The muffler includes a noise damper for the European market, and an approved spark arrester for the US market. Noise emissions of 94 db are within the new strict regulations. The header pipe features an additional chamber for a better response at lower rpm and for more top end power. You will also save on weight, when compared to stock exhaust systems.
Performance
Measurements of the Akrapovic EVOLUTION system on the YAMAHA WR 450F (with muffler insert):
Power & Torque: the Akrapovic Racing and Evolution systems provide the increased performance that top riders are looking for. Engine performance is increased throughout the entire rpm range. The power curve is steeper and smoother, and the increases are highest in the low end and top of rpm range. We measured max power output of 43.8 HP at 8001 rpm and max. power increase of 6.3 HP at 6780 rpm. The torque also gets a major boost, which will make riding smother and faster on the track.
Schematic
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SLIP-ON EXHAUST SYSTEM for the YAMAHA WR 450 F (2007)© 2010 AKRAPOVIC
