YS 1.40 Sport

[BUDDYonRC at aol.com]

Jon
You can do it yourself it is an easy fix.
First remove the throttle arm from the barrel. Then remove the  small 
retainer clip which is on the same end of the barrel as the throttle arm.  then back 
out the throttle stop screw.
Now push the barrel out, be sure to push it out from left to  right while 
looking from the front of the engine to keep from damaging the  barrel seal (that 
is push from the throttle arm end toward the low speed  needle end) Remove 
the low end needle. You will see a hole in the barrel  baffle on the low end 
needle side, this hole is about 3/32" in diameter. use a  new 1/8" diameter drill 
bit and drill out this hole to exactly 1/8" diameter  with the new drill 
bit.I used two pieces of soft wood or balsa to chuck the  barrel in a small vice 
to do this, the barrel is aluminum and will drill out  very easy. after this is 
done clean up any burrs with a sharp  exact-o  blade. reinstall the low end 
needle, screw it in all the way then back it out  2-1/4 turns. 
Reinstall the barrel making sure to push it in starting from  the throttle 
arm end to keep from damaging the seal. That's it done deal! 
Run the engine and adjust the high end. You may need to re  adjust the low 
end needle. Mine is now set at 2-1/2 turns  open. 
This fix eliminated 100% of the mid range load up and the  engine runs great 
at all throttle settings.
Buddy  Brammer   
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