Warning

Special engraved Akrapovic verification code on the muffler inlet cap.

News

06 February 2012

Błażusiak is the new SuperEnduro world champion with Akrapovič:

With a perfect haul of points, Taddy Błażusiak won... >>

06 February 2012

Enduropale du Touquet: Leok second in sand and snow:

This year the spectacular beach race in northern F... >>

06 February 2012

KTMs tested in Valencia for Moto3:

Nine 250 cc four-stroke motorcycles for the Moto3 ... >>

SLIP-ON EXHAUST SYSTEM for the YAMAHA YZF-R1 (2004 - 2006)

For the 2004 Yamaha R1 we present a basic version of the Akrapovic SLIP-ON exhaust system with two mufflers and two link pipes. We have also developed an extended version with an optional Y- connecting tube. The basic Akrapovic SLIP-ON system allows the use of the stock catalytic converter. The version with the optional Y- connecting tube extends past the point where the catalytic converter is located, so that the catalytic converter is removed. There is no major difference in performance between the two systems. However, they both outperform the stock system in both power and torque. The system is intended for riders who do not wish to make major exhaust system modifications. In addition to the Slip-On (open) also Slip-On EC Type approval and Slip-On SP Series systems are available.

Performance

Measurements of the Akrapovic SLIP-ON system on the YAMAHA YZF R1 (without optional
Y-connecting tube and muffler insert):

Power & Torque: performance measurements were made on both systems. The difference is minimal, with the advantage going to the option with the optional Y-connecting tube, which is slightly better in the middle of the rpm range. There is also a slight difference at the top end, but this does not affect the riding characteristics. Despite being only a first-stage tuning component, the system adds quite a bit of power to the stock engine figures. The standard option without the Y-connecting tube puts out 159.6 HP at 12800 rpm. The option with the optional Y-connecting tube was measured at 159.4 HP at 12700 rpm. The torque curves of the two options are also very similar. There is a significant increase over the stock torque curve, especially above 6000 rpm.