MrStompy wrote:Hello
when i bought my bike from SCM (kogarah) they invited me to a maintenance course.
When i went to this course a mechanic was pointing out a heap of cheap mods to a hayabusa to increase power/performance. Most of these mods were to do with the polution gear etc that when removed or changed would assist in horsepower gains.
And to think... some people pay money to go along and hear this sort of wisdom being dispensed...
My ZX9 was a half-finished trackbike when I got it, and the exhaust port breathers had been short-circuited together. I plumbed the vacuum chamber and its associated hoses back in as a test when I was chasing excessive fuel consumption gremlins, and noticed exactly three-fifths of sfa of a change in either power or throttle response, so I left it in there.
Unless you're chasing tenths of a single horsepower, removing the exhaust air-injection system is pointless unless you're looking to double or triple the amount on unburnt fuel your bike shoots out the back.
If the Z750 has a paper filter, swap it over for a foam one, fit a full race exhaust system (the Z1000 has the same exhaust port diameters as 2000-and-onwards ZX9's, so ZX9 race exhausts a direct fit... this is likely to have implications for the Z750) for the weight saving as much as the power gain and if you still have to fiddle after that, do something about the twin-piston sliding-pin front calipers.