learaway Posted June 18, 2010 Share Posted June 18, 2010 hello. have dt 125 that runs rich,dropped to #110 main jet have #7 ngk sparkplug jet needle at leanest clip setting #4j13 will a leaner jet needle fix it? use 32:1 oil/gas ratio air screw 2 turns out k&n filter clean is the crank seal letting transmission oil to cylinder ? ...i plugged off oil injector. any thought to this issue would be helpful thank you:: learaway Link to comment Share on other sites More sharing options...
Moderator Airhead Posted June 18, 2010 Moderator Share Posted June 18, 2010 is the crank seal letting transmission oil to cylinder ? ... To quickly test the right crank seal put the transmission breather pipe into a jar containing white spirit, turps, kerosene etc. Start the engine and increase the revs , watch for bubbles or any difference to the level in the jar. Why do you think its running rich? what evidence is there for this? ...Paul Link to comment Share on other sites More sharing options...
Moderator drewpy Posted June 18, 2010 Moderator Share Posted June 18, 2010 Why do you think its running rich? what evidence is there for this? ...Paul tenners comming out of the exhaust! Link to comment Share on other sites More sharing options...
learaway Posted June 18, 2010 Author Share Posted June 18, 2010 To quickly test the right crank seal put the transmission breather pipe into a jar containing white spirit, turps, kerosene etc. Start the engine and increase the revs , watch for bubbles or any difference to the level in the jar. Why do you think its running rich? what evidence is there for this? ...Paul ............the sparkplug is very oily& the engine wont clean up @ mid throttle to full throttle idle is fine and crisp until a bit past half throttle. no actually it was.....it was pixi dust blowing out tis exhaust! Link to comment Share on other sites More sharing options...
learaway Posted June 18, 2010 Author Share Posted June 18, 2010 To quickly test the right crank seal put the transmission breather pipe into a jar containing white spirit, turps, kerosene etc. Start the engine and increase the revs , watch for bubbles or any difference to the level in the jar. Why do you think its running rich? what evidence is there for this? ...Paul Link to comment Share on other sites More sharing options...
Recommended Posts