Flapper Mod
pic courtesy of Sir
James & Andy B (www.hondahornet.co.uk)
Very simple to do:
1. Remove the seat & left side panel | |
2. Remove the 3 screws that hold the airbox lid on | |
3. Remove the hose from the vaccum switch & plug the hose with suitable sized screw or bolt. You can then tuck the hose behind the intake air temperature sensor that is attached to the airbox directly behind the vaccum switch. | |
|
I believe this was done by Honda for no other reason than to keep the noise down for EPA testing! The induction roar is howlin' mad now especially at freeway speeds & the bike no longer has a surge of power at 5500 rpm, but it is not because you are losing horsepower it's because it is making the power curve more linear & producing better power below 5500 rpm so when the power picks up at 5500 rpm you no longer feel it as an increase since the power flows much more smoothly now. |
Since this mod is so simple I strongly urge any of you to disconnect & plug the vacuum line & try it for yourself. If you don't like it then put it back on... |
Where this type of testing gets tricky is in the fact that dyno testing will only give you full throttle acceleration results & mods like this may hinder a full throttle run, but be beneficial to a partial throttle roll-on etc... That is when you have to weigh out which you need more. Most people don't ride their streetbikes around pinning the throttle to the stop & if they have to give up some WOT acceleration in return for better lowend or midrange roll-on acceleration or throttle response they usually will. |