| The mesh acts as primary filter stoping big bits getting to whatever air filter you have fitted.
When modifying the mesh you might find the air fuel ratio needs some adjustment, but that depends variables such as what type of air filter you are using.
Generally speaking if you get more air into the engine you need more fuel to go with it to get a benefit. All depends where you are when you start, e.g. OK, lean or rich, even then some spooky stuff can happen, i.e. the opposite of what you might expect. e.g. on my bike I expected it to be rich because of an air restriction in the way of the front cylinder bellmouth but when tested it was lean.
Maybe because these bikes don't have any sorted of MAF sensor or lambda sensor controlled trim? Would be interested to know what determines the amount of fuel the injectors are "told" to throw in? TPS, water temp (below a cetain threashold?), engine RPM?? Not very sophisticated compared to a modern 4 wheeler??
The air/fuel ratio can vary between the front and rear cylinder, the air filter set up can influence this as well.
With the changes made to my bike the next move would be a power commander, or an FIM ECU to set the fueling as near to the ideal for each cylinder as possible.
Ray.  |