Two Wheels Better

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Number of posts : 4768
What do I know about the oxygen sensor that isn't there? I'd say it's missing. Someone should search for it. But seriously, folks! It's not a must-use item and the system will simply default to full rich.
Remus headers for K100-16V (Motronic 2.1) K1100 (whether Motronic 2.1 or 2.2) and K1200 (Motronic 2.4) used a capped bung for the use (or non-use) of an O2 sensor. If any early Remus header was supplied without the threaded bung then it was meant for pre-Motronic bikes such as 8V K100 or for those not desiring to use the signal from an O2 sensor. The threaded bung hole has been in Remus production for fifteen-plus years.
As I said, the system will simply default to full rich, perhaps not a bad thing if performance improvements are expected, such as when removing catalysts, opening up airboxes/less restrictive air filters, and such.
Frank Stevens from BMW once told a group of the assembled, when queried yet again about the dreaded lean surging from Motronic 2.2 R1100 & Motronic 2.4 R1150 Oilheads in the early days, "You wanna get rid of the surge? Unplug the O2 sensor!"
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1970 R60/5, OZ '77 R75/7-R100, '85 K100, '87 K75C, OZ '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R, '04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-Polizei - Beemers owned still or sold.