How to set the ignition timing on a CDI?
If you do not have a curve on your cdi, you set the timing so the powerband of your pipe is where you want it. Set it more advanced to lower the peak power rpm value, and set it more retarded to have the peak power of the pipe at a higher rpm value.
What should my CDI timing be on my moped?
Lets talk about where you should set your timing for your specific application. If you have a CDI that does not have a curve then you will probably want to set your timing somewhere between 1.0mm and 2.5mm BTDC. Setting it much lower than 1.0mm BTDC will cause the bike to run poorly.
What does it mean to advance ignition timing?
Advancing your ignition timing means that the spark plug fires the air-fuel mixture in the cylinder earlier (measured in degrees Before Top Dead Centre) than it does out of the factory.
Can a CDI be used as a stock ignition?
If your CDI has a curve on it, it makes things a bit more complicated, but if you understand the implications of variable timing as laid out above, then you can use this to your advantage and increase power at all rpm ranges. Let’s take a simple curve example: The stock timing curve of a Puch HPI ignition.
If you do not have a curve on your cdi, you set the timing so the powerband of your pipe is where you want it. Set it more advanced to lower the peak power rpm value, and set it more retarded to have the peak power of the pipe at a higher rpm value.
What do I need to advance ignition timing?
The tools you’ll need are a couple of spanners, some wire, a screw driver and, importantly, an inductive timing light. A general rule of thumb is that you can advance the ignition timing of most cars with a distributor cap, including older Hondas and VWs.
Lets talk about where you should set your timing for your specific application. If you have a CDI that does not have a curve then you will probably want to set your timing somewhere between 1.0mm and 2.5mm BTDC. Setting it much lower than 1.0mm BTDC will cause the bike to run poorly.
If your CDI has a curve on it, it makes things a bit more complicated, but if you understand the implications of variable timing as laid out above, then you can use this to your advantage and increase power at all rpm ranges. Let’s take a simple curve example: The stock timing curve of a Puch HPI ignition.