Arrow 73009MI Stainless Steel Racing Mid-Pipe – BMW C 650 Sport (2016-2020)

The Arrow 73009MI link pipe is the racing central section made of stainless steel for the Arrow exhaust system on the BMW C 650 Sport maxi-scooter from 2016 to 2020. It connects the headers to the Race-Tech silencer, also fits original headers, has a 50 mm inlet and a 60 mm outlet, and weighs 0.5 kg. It is not street legal: it is the track version. Product code 73009MI.

✓ Strengths

• Declared stainless steel – the Arrow technical sheet for this code states link pipe material: stainless steel.
• Measurements match the silencer – the 60 mm outlet corresponds to the 60 mm inlet of the Race-Tech 73512AKN silencer: the two parts are designed to couple.
• Also fits original headers – Arrow explicitly states this at the bottom of the model's assembly diagram.
• Or with Arrow headers – on the diagram, the link pipe is also connected to the 73010MI racing headers.
• Only 0.5 kg – this is the weight declared by Arrow for this code.
• Spring attachment – the part has a hook welded to the body for the retaining spring.

Technical specifications

Vehicle compatibility

The list is taken from the official Arrow spare parts catalog. Always check your scooter's model and year before ordering.

Performance declared by Arrow

These are the values Arrow publishes for the BMW C 650 Sport 2016-2020 and refer to the complete system, not just the link pipe.

Products listed in the catalog

• 73512AKN – the Race-Tech "Dark" aluminum silencer with carbon end cap, ECE approved, to which this link pipe connects
• 73009KZ – the approved catalytic link pipe, the street version of this part
• 73010MI – the racing headers, to complete the system upstream

Who it's perfect for

For those who take their C 650 Sport to the track and want the Arrow system in its most open configuration. This is the crossroads of the system: at the same point, Arrow offers two link pipes, and this is the racing one, without an homologation mark, while the 73009KZ is the street catalytic one. It's inexpensive, weighs half a kilo, and also mounts on stock headers, making it the part that allows you to try the Arrow system without replacing everything. Those who use the scooter on the street should opt for the 73009KZ instead.

Frequently Asked Questions

Is the Arrow 73009MI street legal?
No. On the official Arrow diagram for the BMW C 650 Sport 2016-2020, this code is indicated as a "racing link pipe" and does not bear the homologation mark, which appears next to the 73009KZ catalytic link pipe. It is therefore a part for track use.

What is the difference from the 73009KZ?
They occupy the same position in the system and have the same weight, but the 73009KZ is the approved catalytic link pipe, with the homologation mark next to the code on the diagram, while the 73009MI is the racing link pipe and does not have that mark. Both also fit original headers.

Does it fit original headers?
Yes. Arrow explicitly states this at the bottom of the model's assembly diagram: the 73009MI and 73009KZ link pipes also fit original headers. Therefore, you do not need to replace the headers to use this link pipe.

Which silencer does it pair with?
With the Arrow silencer for the same motorcycle: on the assembly diagram, the link pipe is connected to the 73512AKN, the Race-Tech "Dark" aluminum with carbon end cap. The link pipe's outlet is 60 mm and the silencer's inlet is 60 mm: the two measurements match. The silencer must be purchased separately.

What are its measurements and material?
Arrow declares the link pipe to be made of stainless steel, with a 50 mm inlet diameter and a 60 mm outlet diameter, weighing 0.5 kg. The body length, however, is not declared: on the technical sheet, that field is zero. There is no provision for a lambda sensor or CO sensor.

What changes in performance?
Arrow publishes for its system on the C 650 Sport 51 HP and 56.39 Nm compared to the 46 HP and 52.96 Nm of the stock system, with 4.41 kg less weight and 2 dB more noise (93 dB vs. 91 dB at 3,750 rpm). These are values for the complete system, not just the link pipe.