What happens if you leave fuel petcock on?
Yep, It is advisable to turn off Fuel when you are parking your bike for longtime as most of the motorcycles fuel ⛽ tank is higher than the carburetor which makes the continuous flow of fuel to carburetor to from fuel tank when if carburetor failed to close the valve gas would continue to trickle into carburetor which …
What is the purpose of petcock?
A petcock is a small shut-off valve used to control the flow of liquid or gas. Historically, petcocks were threaded valves controlled by a butterfly handle; modern petcocks are typically ball valves.
Why did BMW invent the petcock fuel tank?
A BMW engineer had invented a method for the tank not to need venting at the gas cap. The fuel petcock would allow a lot of tiny bubbles of air to go upwards in the fuel as it was flowing down. BMW patented and licensed it to Everbest.
How do you check the fuel line on a petcock?
Remove the lower end of the fuel line at the petcock that you want to check. Use air pressure to try to blow any dirt upwards and back into the fuel tank. Be sure to clean out both main and reserve positions. Now test the flow again.
When did BMW stop using petcocks on motorcycles?
The Everbest petcocks used on BMW motorcycles were a bit odd to use. They didn’t follow the United States standard for valves and petcocks. The text embossed in the castings is in German, not English. This petcock was used from the R25/3, the first of the Earles fork models, until the end of the /5 BMW series in 1973.
When did BMW upgrade to the karcoma petcock?
BMW finally upgraded to the Karcoma petcock in 1974 for the /6 series. It is far better and is often used for older models too. It is a direct swap. We always wondered how BMW could use such a poor item on a motorcycle for so many years. At a service school put on by a factory instructor, I asked that question.