I use the LM1 wide band reader to tune my Syclone.
http://www.ebay.com/itm/Innovate-LM-1-Di...b2fd06a&vxp=mtr

I have this for my inline 6 http://www.innovatemotorsports.com/xcart/product.php?productid=16290&cat=262&page=1

Using a wideband O2 reader takes out the guess work on what yoyr engines A/F ratio actually is.

No real need to pull out your spark plugs to try & read if the engine is lean, rich or who knows what.

It will allow you to see your engines A/F ratios from the drivers seat. From idle to part throttle, the full throttle.
It is an accurate way to see if your carb is jetted correctly.

I would never tune w/out one, makes tuning so-much easier.

MBHD

12 port SDS EFI