Exhaust decoke

 

Remove the exhaust silencer endpiece by removing the nut inside. The end section then pulls off and teleases the tube tree inside.

Remove the trlube tree. Scrape any of the sticky deposits you can reach from inside the silencer and inside the end cap. Clean the tube tree I find DPF cleaner works but paraffin also helps. Its a nasty disgusting job however you do it.

Reassembly is the reverse but note the rope seal in the recess at the end of the main silencer (in the groove where the end piece fits) and do not damage or remove it as you clean! Secondly the silencer never seals onto the down tube and exhaust always leaks here. I seal the joint with Curil or Vital copper RTV- but silicone would also work.