Dave
I run a tillotson on my Adventure Solo 210 and had to re set it following a strip down recently.
I dont think your initial settings are too far out at 1 1/4 for the L and about 3/4 to 1 turn out for the H.
Remember these are just a rough starting point and you will need to fine tune both screws.
If you have a copy of the Powered paragliding bible there is a good section detailing how to tune a membrane carb on page 231.
You are as well to double check with a plug chop once you have adjusted it to make sure it isnt running too lean.
Best of luck
Jacko