Daelim VT125F Engine Overheat

Sorry if I'm posting in a wrong section, but I don't understand German so I cannot find where else should I post :/

I have a problem with my Daelim VT125F. I've bought it from Germany in 2012. It was probably a 80km/h version, because it never went over that, even though I was trying to find information on how to increase the maximum speed, if it was even possible in the first place. However, I was using this motorcycle for two years without problems.

During last year it started to overheat the engine. I mean, after 5-6km of riding, the engine starts jerking,the power drops down, speed drops to 50, then 40, after 10 more minutes of riding it cannot exceed 35km/h. When I stop and turn off the engine, its massively overheated from both sides, I can barely touch it for 1-2 seconds, because it's so hot. First of all I thought it might be too low oil, but it shows that oil level is sufficient. I can't find a service manual to see information about ignition regulation. Do you have any suggestions? I would be greatly thankful.

Hallo hoffe Du verstehst was ich schreibe.

Wenn die Maschine zu heiss wird könnte Öl-Filter, Öl-Kanäle verstopft sein oder gar die Öl-Pumpe verschlissen sein. (liefert zuwenig Druck)
Auch bei einem viel zu mageren Benzingemisch kann der Motor zu heiss werden.(zuwenig Benzin, oder zuviel Luft)

Wie viele Km ist sie gelaufen? Wurde Öl und Filter regelmäsig gewartet?

Gruss Mechanix





Google Translation
Hi hope you understand what I write.

When the machine is too hot could oil filter is clogged oil channels or even be the oil pump is worn. (delivers too little pressure)
Even with a too lean fuel mixture, the motor may be too hot. (Too little fuel, or too much air)

How many kms did you go? If oil and filters serviced regularly provide?

Where can I find the oil pump? I have taken the engine apart, but haven't found it...

Also, the oil filter is probably taken out. The slot is empty.

I went for 10km ride and that was it. It could no longer go, so I had to wait for the engine to cool down before I could start it again.

Oil filters were not serviced at all.

Here you can find the oilfilter:


You're shure that the slot is empty? Then thats the reason for your problem. I don't know were is the oilpump in this engine but I think you must check this properly. Don't drive with this failure!!! You kill the engine! Repair it first! I think the oil is not circulated in the engine.

Wenn kein Filter montiert ist kann es also gut sein das die Kanäle verstopft sind und Öl-Pumpe verschlissen ist.

Die Öl-Pumpe ist im Deckel montiert in der nähe der Öl-Filter Einbuchtung. Das heist der ganze Kuplungsdeckel wo der Öl-Filterdeckel drauf geschraubt ist muss abgeschraubt werden um an die Pumpe zu kommen.
Erst könntest du mal messen ob die Pumpe Druck macht. Dazu müsste man ein Druckmeter beim
Ventil Bypass (im Öl-Filterdeckel ) anschliesen und messen wie viel kg/cm Druck sie liefert.
Oder mit Daumen das Schraubenloch bei entfernten Ventil Bypass kräftig zu halten und schauen ob Druck fühlbar ist wenn der Motor läuft. Achtung macht sie Druck spritzt Öl raus wenn nicht zugehalten. Wenn Öl kalt ist gibt es dort ca. 2-3 atü wenn warm ca 0.5-0.8 Atü

Liefert die Pumpe Druck sind es dann sämtliche Kanäle die gereinigt werden müssen.
Besonders oben im Zylinderkopf bei der Ventilbetätigung setzt es sich leicht zu.

Gruss Mechanix

Wavelow, yes, the oil filter is where you showed. Some people say that when the oil filter was taken out, i will probably have to take the engine apart again and wash all the canals because they might have choked with trash?

Could anyone translate what Gruss Mechanix said?

Thanks.

[Daelim-S3]

Was soll die englische Beitargschreiberei hier, zuletzt geht es auch noch in russisch oder gar kesuaheli. Der Beitragschreiber könnte auch seinen Translater benutzen wenn er kein deutsch kann. Da appeliere ich an den Admin solche Sachen gleich zu löschen wir sind ein deutsches Forum.

@Interflow

we are a German board, so its kind of inpolite for all the other members to communicate in English.

Short translation: Yes you have to remove the cover of the clutch to get to the oil pump. Then you shoudl check, if the pump is delivering oil pressure - carefully otherwise you would get full of oil.

In case the oil pump is delivering pressure you shoudl clean all the oil channels, especially on teh motorhead where the valves are lubricated. There usually it starts clogging the system.

Hope this is of help for you