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(X3 Big Mo Full Exhaust, ECU flash, and Adjustable Clutching) Part #: 15-201

ECU programming - If using BMP ECU re-flash option proceed to step 1. If purchased with Bikeman Flash Device proceed to step 2.

Component list:

  • Assembled Big Mo muffler
  • Big Mo mid-pipe
  • Big Mo outlet manifold
  • 3” V-band clamp (qty 2)
  • Bikeman hose guide bracket
  • Muffler brackets (qty 2)
  • 3 Bikeman Magnetic clutch weights

Tools required:

  • Spring puller – BMP-USP
  • Adjustable 3/8” drive torque wrench
  • Adjustable ¼” drive torque wrench
  • Standard / metric mechanics toolset
  • Torx socket set
  • Scissors

1.     Locate and remove the ECU in the passenger compartment behind the driver’s seat and ship labeled ECU with your name and address to:

Bikeman Performance,

920 Pine St,

Saint Croix Falls, WI 54024

for flashing. There are 2 bolts that hold the ECU in place. Unbolt the ECU. Unplug the 2 ECU connectors. Using your thumb, press in the locking tab while lifting the locking lever of the connector with thumbs and index fingers. Connectors should slide apart easily. Do not force. Once returned from Bikeman, reinstall the EC. Skip step 5.

2.     If using the Bikeman Flash device follow instructions included with the flash device.

3.     Clutching – Install the Bikeman Clutch kit using the settings 1-2 for Desert/Trail riding and 1-0 for Sand Paddles

4.     Muffler shroud removal - Remove the 5 Torx bolts that retain the rear plastic muffler shroud and remove the shroud.

5.     Muffler removal - Unbolt the 4 bolts that attach the bottom of the muffler to the muffler mount. Remove muffler to turbo outlet pipe springs. Remove stock muffler assembly.

6.     Muffler mount removal – Remove the 4 bolts that hold the muffler mount to the frame. Remove muffler mount.

7.     Cat heat shield removal – Remove the bolts that hold the cat heat shield to the frame. Slide heat shield out towards the back of the vehicle (save for future use).

8.     O2 sensor removal - Remove factory O2 sensor (save for future use).

9. Heatshield removal – Remove the heat shield from the stock turbo outlet/cat pipe and install it onto the new Big Mo turbo outlet pipe.

10. Turbo outlet/cat pipe removal – Remove V-Band Clamp. Remove outlet/cat pipe (save gasket and clamp for later use).

11. Turbo outlet mid-pipe brace removal – Remove stock exhaust brace/hose guide bracket and replace with Bikeman hose guide bracket.

12. Big Mo turbo outlet pipe install – Align Big Mo outlet pipe and install V-band and gasket on the connection between mid-pipe and muffler, tightening it to just before movement is not possible.

13. Install Factory O2 sensor into Big Mo mid-pipe.

14. Heatshield reinstall -

15. Big Mo muffler mounts install – Install BMP muffler mounts loosely where stock muffler mount was located using same bolt holes.

16. Big Mo muffler install – Install Bikeman muffler into BMP muffler mounts loosely, keeping bolts 1 turn from being tight.

17. Big Mo mid-pipe install - Align V-band connection between Big Mo outlet pipe and Big Mo mid-pipe and install V-band loosely. Align V-band connection between Big-Mo mid-pipe and Big Mo muffler and install V-band connection loosely. The muffler should line up with mid-pipe easily but due to some variations in frames, brackets on the muffler may need to be adjusted (this is not likely). At this point, V-band connections between outlet pipe, mid-pipe, and muffler should be tightened to just before movement is not possible.

18. Torque V-band to 80 in-lb.

19. Torque Big Mo muffler body to muffler brackets to 40 ft-lb.

20. Torque muffler brackets to frame to 40 ft-lb.

21. Verify exhaust has adequate clearance from anything that can be damaged from heat. Radiant heat can cause damage even with an air gap present.

22. Turn on ignition (do not start) and wait 30 seconds.

23. Turn off the ignition and wait 60 seconds.

24. Turn on the ignition and start the vehicle.

25. Drive the vehicle for 25-50 miles and re-torque V-band and Muffler mounts.

26. Have fun and enjoy your new Bikeman Exhaust system!

27. Go online and let everyone know how much of a difference it makes because you have purchased the best system available!

(If you would like your stainless exhaust header and mid-pipes to get a golden color to them, let the vehicle and exhaust fully cool down then wipe the exhaust down with WD-40.)