Question about 2011 KTM 990 Adventure
Dipped head blows and speedometer goes of but comes back on bike is 990 adventure r year 2011
If it is smoking a light blue then it is burning oil. What you need to do is mic the cyclinder bore and then the piston and find out what the max wear spec is. If there is to much clearance between the rings and cyclinder it will burn oil. First do a compression test. 100 psi is ok but anything below that you need a bore job-new piston and rings.
Posted on Nov 24, 2009
have you checked your main fuse is the battery fully charged is there spark at the plug are you sure you havent bumped the kill switch without noticeing it
Posted on Apr 15, 2010
SOURCE: have a 2007 ktm 50
You likely need a smaller pilot jet in the carb.
Try screwing the air screw in and out - if screwing it out seems to help then you need to change your pilot (low speed) jet. I don't have any recommendations for you as far as size, but just get one the next smaller size from what's in there now. When perfectly sized, your air screw will like to be set around 1.5-2.0 turns from seat.
This could also be a sign that you need a new ring. The rings don't last long in these bikes - you need to re-reing quite frequently. it's a very common thing. Lower compression from a worn ring will make the motor act as if it's too rich due to incomplete combustion and lower combustion temps. A worn ring will show up at lower engine speeds first- much like you describe.
Posted on May 24, 2011
SOURCE: how to make a 2005
Thank you for contacting FixYa with your inquiry.
If the bike is running correctly and RPM's through all the gearing range you are probably at the bikes optimum speed range with present set up as is.
If it's down on power or faltering while running we probably need to do some tuning or replacement of power components (Piston & Rings, Gaskets etc....) Check the spark plug after running and make sure it's a cocoa brown color and the jetting should be correct. Check the manual for jetting instructions if the color is off.
The simplest speed increase is gearing (requires some in-expensive parts). Easiest way is to go up one tooth on the primary sprocket and add a master or half link to the chain (if needed) to adjust the length. Would try only 1 tooth increase at a time to test.
In Oregon we many times use the stock primary sprocket when running in the mountains, up one tooth for running in the desert, and up 2 teeth on the primary when running over 100mph down in Mexico. This mostly applies to the big bikes but it's the same for the mini's.
Hope this helps and thanks again for contacting FixYa.
Posted on Jul 13, 2011
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