The kVA (kilovolt-amperes) rating of a Harley-Davidson starter motor typically ranges from about 1 kVA to 2 kVA, depending on the specific model and engine size. The starter motor is designed to provide sufficient torque to start the engine efficiently. While kVA is not commonly specified for motorcycle starter motors, understanding their power requirements is essential for performance and battery considerations. Always refer to the manufacturer's specifications for precise details.
install starter motor
I use a starter solenoid from a 1991 - 1995 Toyota Pickup on my 1998 FLHT Evo... and a fraction of the cost from Harley.
To remove a 1987 Harley Davidson starter motor, first disconnect the battery to prevent any electrical shorts. Then, locate the starter motor, usually mounted near the engine, and remove the bolts securing it to the engine. Disconnect the wiring harness and carefully pull the starter motor out of its mounting location. Finally, ensure all connections are clear and check for any debris before installation of a new starter, if necessary.
12HP is approximately 10.8 KVA. You would want to use a 15KVA transformer to supply this motor. KW = HP * .75 KVA = KW * 1.2 (These formulas are approximate)
To determine the KVA needed to run a 55 kW motor, you can use the formula: KVA = KW / Power Factor. Assuming a typical power factor of 0.8 for motors, the calculation would be KVA = 55 kW / 0.8 = 68.75 KVA. Therefore, approximately 68.75 KVA is needed to run the 55 kW motor. Adjust the power factor accordingly if you have a specific value for your motor.
Usually the starter overrunning clutch is the first part to fail in a modern (post 1988) Big Twin. Unlike earlier Harley starters, modern ones have the starter motor, solenoid and overrunning clutch built into a single unit, just like a car's starter. In fact, Harley's starters are the exact same ones used in many cars, like Toyota. So how do you know if the starter clutch is failing or has failed? The starter motor turns but doesn't crank the bike's engine. You can pay big bucks to your Harley dealer or buy the same starter clutch much cheaper and install it yourself. The starter isn't complicated at all. Do a web search for any of these part numbers: Toyota part #0283010010 WAI part #54-82401 NAPA Auto Parts #4-1071
Remove the starter. the solenoid is mounted on the starter.
5 kva
The first thing that is required is the amperage of the motor. I = HP x 746/1.73 x E x %eff x pf. This comes to about 277 amps. The second formula to use to find KVA is KVA = I x E x 1.73/1000 = 277 x 480 x 1.73/1000 = 230. The minimum size generator will be 230 KVA.
Could be to switch the fuel pump on/off when ignition is turned on or maybe for the starter motor?
A whining noise and a seizing starter on your Harley can be caused by several factors, including low battery voltage, worn starter motor components, or a failing starter relay. Insufficient power can lead to the starter not engaging properly, causing it to whine and potentially seize. Additionally, issues with the starter solenoid or a faulty ignition switch may also contribute to these symptoms. It's important to check the battery and electrical connections, as well as the starter itself, for any signs of wear or damage.
What model?