May 2004

First horsepower gains with a modded airbox

After double checking my bike's performance against another GTS1000, it was discovered I had an HT fault, not a head gasket problem, although I did find I had a coolant fan switch fault later. Below is a curve with the airbox off and with the airbox on.

After doing the essentials, I noticed that the holes into the airbox were mighty small compared to say a a well fed 250cc four stroke, so I removed the top lid of the airbox and I got a bit more horsepower than this.


The green line is what I ended up with after putting back the stock lid and air filters. Not a bad gain for a little work with a holesaw,
and the blue line is the unmodified bike's rear wheel horsepower plot.