Part of MembersPage/DTechnologies/Hayabusa project
- The Goal: The goal here is to have a simple microswitch trip when the front wheel comes off the ground. The switch will connect with the VEMS unit to initiate a reduction in boost to reduce power and stop the wheelie without having to reduce throttle.
- This is actually technology that already exists in the aftermarket. Schnitz Racing has built a box that does the same thing for a motorcycle but retards the ignition to reduce power.
- The mechanism will be relatively simple as well. A clamp will be connected to each the upper and lower fork leg. One of these clamps will have a rod attached to it. The rod will slip through a hole in the other clamp (likely with a teflon bushing to prevent wear). At the end of the rod will be a microswitch.
- The principal is that when at rest, the front springs inside the fork are partly compressed. When the bike accelerates hard enough that the front wheel comes off the ground, the springs push the fork legs out until they top out...this is where the rod would be calibrated to hit the microswitch.
- Track time would have to determine how much to reduce the boost. In the case of my bike as the wheelbase has been extended 8", it wouldn't need to be much.
- In fact, with 300 hp wheel spin is likely to be as serious a threat to performance.
- A manual override could be put on handlebars inline to induce boost reduction all the time (for safety on rainy days, etc.) more like a typical 2 stage boost control setup.
Because of latency of the system (retard works fast, but boost needs some time to decay) it might worth investigating a system that provides an early warning signal. maybe
- more than 1 switches in different positions
- analog inflation indicator
- or an inductive coupling system (similar used for pedal position sensors and other drive/fly by wire equipments). Very appealing but requires some (simple) electronics.