Motorcycle Diagrams


fcd fuel cut defencer

There has been a great deal of interest on the Team FC3S list in a cheaper (and if possible, superior) alternative to the expensive FCD`s offered commercially. This is understandable given that no modification to the Turbo II that raises the possible boost pressures can be attempted without an FCD. This article presents a simple […]


fuel injector pulse width monitor

Here is a picture of the faceplate that holds the LED bargraphs for air/fuel and pulse width as well as the pot to control the fuel mixture above 7psi boost. The switch allows either the primary or secondary injector pulse to be monitored. The faceplate is made of polished aluminum. The air/fuel (O2) monitor, pulse […]


parking aid senses distance to rear of v

Three LEDs signal bumper-barrier distance Infra-red operation, indoor use Circuit diagram: Parts: R1_____________10K 1/4W Resistor R2,R5,R6,R9_____1K 1/4W Resistors R3_____________33R 1/4W Resistor R4,R11__________1M 1/4W Resistors R7______________4K7 1/4W Resistor R8______________1K5 1/4W Resistor R10,R12-R14_____1K 1/4W Resistors C1,C4___________1΅F 63V Electrolytic or Polyester Capacitors C2_____________47pF 63V Ceramic Capacitor C3,C5_________100΅F 25V Electrolytic Capacitors D1_____________Infra-red LED D2_____________Infra-red Photo Diode (see Notes) D3,D4________1N4148 […]


parking sonar

FEATURES: automatic switch on on rear gear led-bargraph display audible bleep on last led “good old” design style, no microcontrollers! Based on an ultrasonic amplifier from an article seen on a 1982 magazine, it was once installed on the rear bumper of my Volvo Station Wagon. It served very well for many years. Connecting it […]


speed alert wireless portable unit

Adaptable with most internal combustion engine vehicles Parts: R1,R2,R19_______1K 1/4W Resistors R3-R6,R13,R17_100K 1/4W Resistors R7,R15__________1M 1/4W Resistors R8_____________50K 1/2W Trimmer Cermet R9____________470R 1/4W Resistor R10___________470K 1/4W Resistor R11___________100K 1/2W Trimmer Cermet (see notes) R12___________220K 1/4W Resistor (see notes) R14,R16________68K 1/4W Resistors R18____________22K 1/4W Resistor R20___________150R 1/4W Resistor (see notes) C1,C7_________100΅F 25V Electrolytic Capacitors C2,C3_________330nF 63V […]


synchronized multi spark module smsm

Multi-spark ignition is very useful especially in the case of startings at low temperature and at low rpm range. Basic idea, is to apply to spark plugs instead of only one spark, a spark-burst having big energy. In this case, combustion of air/fuel mixture is much better and the emissions are more reduced. In addition, […]


electronic car ignition circuit

Description: This scheme is for 4 cylinder motor. This will make your car spent less fuel, be a little bit faster and you wont have to frequently open your distributor cap to change the contact buttons thus wasting less money. T1/T2 create one monostable multivibrator in which C2 and R5 determine the length of impulse […]



A Simple Transistor Based Motorcycle Alarm

Description This is a simple – easy to build – transistor based motorcycle alarm. It’s designed to work at 12-volts. But – if you change the relay for one with a 6-volt coil – it’ll protect your "Classic Bike". The standby current is virtually zero – so it won’t drain your battery. Schematic Diagram Notes […]


A Cmos Based Motorcycle Alarm

Description This circuit features an intermittent siren output and automatic reset. It can be operated manually using a key-switch or a hidden switch; but it can also be wired to set itself automatically when you turn-off the ignition. By adding external relays you can immobilize the bike – flash the lights etc. Schematic Diagram Notes […]