Even some systems on cars would pulse the injectors with a closed intake valve, the mixture just hangs around before being sucked in.
Some bikes must do that as there are no cam position sensors and there is nothing to tell between TDC on the power stroke or the exhaust stroke.
Any thumper without a cam position sensor would HAVE to do this.
Originally Posted by MentalGuru
The injector only needs to squirt every other revolution. It needs a cam sensor or fancy programing do do this.
This system is very close to a pre 0BD2 system but not as advanced. It is very simular to Dodges system they used on early 4 cylinder MPI cars.