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

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

Why do you think its running rich? what evidence is there for this?

...Paul

tenners comming out of the exhaust!

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!

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