I am looking for a manual for my hongyi diablo prince motorbike i have got no ignition and dont know why, there is no spark from the end of the lead although it had been running the day before, regards angie

Here is a diagram showing the spark plug leads attached to a coil pack:

Ignition coil
Spark plug lead
Spark plug
In this diagram, the ignition coil is at the center and is connected to the spark plug leads, which are in turn connected to the spark plugs. The spark plugs are located at the end of each spark plug lead and are responsible for igniting the fuel in the engine's cylinders.

In a typical engine, there will be one ignition coil for each cylinder, and the spark plugs will be connected to the ignition coils through the spark plug leads. The ignition coil generates a high voltage electrical current, which is transmitted through the spark plug leads to the spark plugs. The spark plugs then use this electrical current to create a spark, which ignites the fuel in the engine's cylinders and powers the vehicle.

It doesn't look like there is one. All the sites are scammy. There is a video.

https://www.google.com/search?q=Diablo+mini+chopper+repair+manual

Engines only need three things to run

Good clean, not stale, stored Fuel
Compression
A spark at the right time

One of yours is missing.

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have to looked at the timing belt?

fancy getting brother to hold HT lead ,i havent stopped laughing yet and i have tears in my eyes ,try changing thte ignition module ,i think its inside the distributor on this ancient vehicle the white box is a radio capacitor i think .thats like me when i taught mechanics i sent this lad out to my transit DIESEL with a spark plug spanner to change the plugs ???

The system to create a spark starts with the key in the ignition that then switches power from the battery to the ignition coils? Do you have a coil or lead shorting out? are the spark plugs in good order? the only thing that will then break the circuit is the kill switch. do you have a manual with circuit diagram?

take the plug out and ground it to the cylinder with the coil lead attached, kick it over and check for spark... if no spark the problem is in the ignition system. if you have a manual get the specs for source coil output (should be between 15-120 ACV) and use a multimeter to check, most of the checks can be done at the CDI box, dont know how well you know motorcycles, but you might need to see a mechanic..

Although I'm not sure about the carburetors, but you should be able to find out by following these steps.
Unscrew the spark plug cap/s and look check to see the condition of the lead. If its bad, cut the end and rescrew the plug cap. Check all the wires and connections going to the ignition coil and make sure they have good connections and no burns or cracks in the coil case. Start the bike and see if you can see any sparks or flames coming from the coil or from the wires or leads. if so replace them. If none of this seems to be the problem, i'm guessing this mean its something to do with the carburetor. Also i'd strongly advice getting a Haynes Manual for your bike, their excellent! Hope this helps.