Warning, you must,must,must have the  "Triumph Off-Road" tune installed on the ECU before removing the Cat.  In the UK they do not use an exhaust gas analyser during the
annual MOT, if they did I would have kept the Catalytic Converter.
Tiger 1050 Tuning 3 - Removing the Catalytic Converter
The Cat is easy to access
with the silencer and link
pipe removed.  The only
specialist tool I needed  
was a 400mm long 10mm
HSS drill purchased from
With standard Catalytic Converter, a bit like
stuffing a sock in you mouth then going for a run.
With Catalytic Converter removed - See Tigers
do have Tonsils
With holes drilled, ready to chiesel out
I found a video on You Tube explaining how to remove the Catalytic converter from the Tiger.  The Cat sits under the gearbox.  I left the pipes in place and I
did not even remove the Lambda probe.  Click on the link below:
Link to Markjrobbins' excellent Tiger Cat
Removal Video
First I used the long 10mm drill to make a series of holes in the CAT.  Even though the CAT is made of honeycomb metal it is tough to drill and the drill tipl
will get very hot so it needs regular quenching in water.   After the holes were drilled I used a long screwdriver which I ground to a sharp blade as a chisel to
break up the remaining material.  I kept starting and revving the bike to eject the waste followed by more drilling and bashing.  Once you have removed one
large piece it gets easier but it is difficult to break off the first large piece.  I ran my Tiger with no silencer with the cat removed and it is not that noisy,  With
an open pipe it is not as loud as my sons Ducati 749 with Termignoni silencers!  With the silencer back on I feel the Tiger is a bit louder but not enough to
turn heads in a built up area.  At a steady 80 I can just hear a slight increase in noise.   One week later I rode Brands Hatch for the 3rd year in a row, they
measured my exhaust at 98db at 5,500 revs.  Hard to believe that the noise level is raised by only 1db from previous years even though my Tiger has a big
hole where the catalytic converter used to be.  I'm not complaining.

So what difference does it make?  Well I don’t need a Dyno run to feel the increase in power, from 4,000 revs the bike pulls stronger, it is still perfect
around town and I can accelerate from 2000 revs in 6th. The Tiger is now very eager so I  need to slip the clutch more on mini roundabout's and around
town because the pickup is instant.  If I give the Tiger full throttle in third the front wheel will lift which never happened before.

At Brands Hatch the 1 litre Fireblade's, R1's and GSXR's are still  quicker on the straights.  My Tiger will stay with them in 2nd, 3rd and half way though 4th,
as the Tiger just starts losing acceleration they just keep going.  I was definitely more able to hang with them this year.

I love this modification. What more can I say.  Thanks to MarkJRobbins
If you would like to contact me please email - webmaster@adrianmolloy.com