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I changed the primary Coil and testet the Spark with Motor on the Bench and secondary Coil directly attached to the motor and the Spark is now Blue/White instead of Yellow/Orange.

Also the Exhaust was full of oil from all the testing which i burned out.

No the Engine is back in the bike and Runs good in medium and higher rpm but idle is not good.

I tried the 12/12 replica Carb with unkown jet size(no marking) and it barely idles with idle srew completly in and with no airfilter, with airfilter it stops immediatly. After stopping the Spark Plug is covered with black oil.

With the 12/10 Carb and 43 jet it doesent idle and only runs with air filter and doesent rev so high like 12/12 with the other jet. Same happens with the 12/12 Carb and the 43 Jet. After Stopping the Plug is also covered with black oil.

I did a fresh mixture with 1:50. As Plug i both used the old Bosch Plug which was in the Motor when i got it and also a new Isolatior 260 from my Simson with same results.

Compression was testet with 10 Bar. Points are Set to 0,4 when the cam is on the highest point.

My concern is that its to rich in idle or the ignition on low rpms is sill not strong enough. At Simson i can adjust the idle screw and also the swimmer in the carb needs to be adjusted but on the ciao carb i dont see this options.

[MaxTopic starterBerichten: 3]

I assume that the Spark is weak because its color is more into Purple/Yellow  than Blue/White.

My motor is now sitting on the bench to test but changed Condenser Ignition Coil and Points with both old and new and results are the same.

Without the Points the primary spool is delivering 8Volts, with Points Connected and Condenser its 3Volts and with Connection to the Ignition Coil its only 2V (all AC).

The Lightspool is deliverung 5,5V and the Blinkerspool 12V.

The coil has good ground and the cables  have no defects.

Can i just buy new Coils from the Standardmodel without Blinker or do i need to change also the flywheel?

[Gebruiker]

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