Quote:
Originally Posted by gwc
Hello
When you notice the pinging or think you have a batch of doggy petrol do the following.Open the cover on the right hand side of the bike (one opposite airfilter cover), you will notice a little plastic box with a load of electrical wires going into it (dont fiddle with it as this is your cdi unit).
On the left hand side of the little plastic box(cdi) there is a male/female connection switch (The so called switchable cdi, well thats the switch). By undoing this connection you will change the compression setting of the bike. There will be loss of power and the bike will also sound a bit like your dads diesel Izuzu bakkie, but the engine will be fine.
GC
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o.k., good advice, but let's be more precise... The KTM Adventure 640 was only from 2003 onwards equipped with that CDI unit with the 2 different Octane curves... If your model was built after 2003, then you can follow that advice. If not, do not touch the CDI.
You will need a new CDI to upgrade your model to use the 2 curves.
If you do not do this, then you then have only 2 ways of improving the ignition process:
1. Add an octane booster
2. Slightly loosen your generator srews and move it to the left (as the screws allow) This will give you a little earlier ignition and eliminate most of the "klonck".
Although I did both, the 70 octane gas in Bolivia killed my piston while I had over 2500 km with that bad gas then later in Chile. Thats life.
So plan your trip carefully and look for branded fuel.
Cheers
Ras
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