Problem: - The standard Tiger 1050 has a twin inlet pipe entering the Airbox with the R/H end banked off.  The one hole on
the lefthand side is 40mm, this is feeding 3 x 46mm throttle bodies!   Even worse, this one 40mm hole is tucked up
against a frame member.  So when you whack the throttle open at low speeds asphyxiation takes over.  My old Africa Twin
was much the same.  However because Big Traillie's have the same aerodynamics as a Basking Shark, at speed you get
a Ram effect.  Therefore my guess is that the Airbox entry can be made small and inefficient to meet stringent noise
regulations.   I have read that the 1050 Speed Triple uses both inlets and it makes more power than the Tiger.
Tiger 1050 Tuning 2 - Airbox
Step 2: - Fit a K&N Airfilter.
I  fitted the K&N to the
standard Airbox together
with the Remus exhaust  
and Triumph Off Road tune.  
To be honest I don't think
the K&N makes much
difference on it's own.
However with a modified  
Airbox I am confident that
the K&N provides a
worthwhile performance
Step 1: - Remove the Tank
and airbox lid .  Then
remove the rubber Airbox
entry pipe and cut out the
blanked of end with a
modelling knife (See
picture on right).  Refit the
pipe and reassemble the
Do the modifications work?  After the modifications when you run the Tiger at a standstill and blip the throttle the engine
revs more freely.  On the road here should be more induction noise but I can't say I have noticed.  The Air Mass sensor,
Lambda probe and ECU (With Triumph Off Road Tune installed)  All combine to ensure the modified engine continues to
run sweetly.

I ride 150 miles a day to work so I have good terms of reference.  With the Airbox modified the Tiger picks up quicker from
say 40-50mph behind a car in 6th gear.  Initial acceleration is noticeably more eager.  My Tiger will immediately pull 30 feet
or 10 metres ahead of a standard bike.  Most of the gain is in the first few seconds.  I am pleased with these modifications
so far.
Step 3: - Cut the mid section out of
the entry pipe.
When I performed the 18,000 mile service I decided to cut
out the mid section of the airbox entry pipe.  (See the photo
on the left).  The Tiger feels friskier and runs well.  I also  
fitted new NGK Iridium plugs and cleaned the K&N Airfilter.
New plugs always make a bike run better.
If you would like to contact me please email -