Your Technical Problems Explained
Technical and basic information that will help you with your bike from all aspects of setup and repair.
In this section we offer our assistance in the maintenance and repair of KTM Off-Road Motorcycles. In time we will give updates on suggested jetting issues and other useful information. Bear with us and we will help you help yourselves all we can.
Important.... Read all of the text below as it will have an importance if you own a 2011 / '12 Injection four stroke SX-f or XC-F bike!
One thing that is becoming more apparent is the "issues" linked to the new fuel injection 2011/12 model KTM bikes. We will endeavor to help you the owners "Help Yourselves" on these matters over the comming weeks. Back to basics I'm afraid as clean fuel containers and after cleaning maintainece will go a long way to sorting these issues...
We have also learned that normal fuel is alledgedly bieng blended with more of a substance that causes the "Furring" up of the injector nozzle when left for long periods of time, adding to the trouble of poor starting. Please Keep aware of updates on this matter as we are genuinly finding that modern day fuel does not keep as well as our yesteryear and older "4Star" users / riders have mostly expierienced....Email us for the full lowdown on these issues and we will send back a four page info document of how to best cope.
We have suffered an issue on one of our FastEDDY race bikes with the tiny fuel filter situated at the entrance to the throttlebody. After only a few hours of use the filter contained enough "Debris" to make the bike feel really down on power. So much so that we had a major disaster at the recent British Enduro Championship with our rider Tom Sagar on a new 450 EXC-F. From this expierience, we would recommend the following;
After every major race we would say that it is of DEFINATE benefit to remove, clean and refit this small filter. If not you may suffer the consequences especially as some two day BEC enduro's are 6 - 8 hours a day with a Parc ferme at night so in terms of hours use, it can run in to double figures before this maintanence is or can be carried out.
KTM do not recomend that the filter is removed alltogether as instead of collecting the debris, it will then allow it to fowl up the injector which is more difficult to clean and access especially in race conditions. (Remember that the fuel pipe is under 3 bar + of pressure so dont try to fit any of the after market clear fuel filters as they may split. Normal "Carbed" type bikes and fuel supply is not under pressure only gravity fed).
The symtoms of the filter bieng or becoming blocked are poor engine performance and then followed by a misfire and bogging effect before it wont run at all. We would recommend any 2011 + '12 bike's to have regular main fuel filter replacements that are situated inside the tank as these will look "Dark" in colour if becoming blocked.
This tiny filter is almost "TOO GOOD" and is fitted as standard to all 2012 Injection model bikes but is available to be put on all 2011 models as well hence our rcomendation that it is cleaned very regularly. When bieng refitted, use either the genuine clip or a "Full Circle" type fuel clip not a conventinal "Jubilee" style clip.
We have also fitted to our race bikes, a "Filter Sock" under the Tank Filler Cap to collect any rubbish that may be in the petrol can.
keep an eye out for any more updates.
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