I am trying to replace shifter know for my 240. does anyone know the diameter and thread depth for my z.

Mark

Most shifters knobs come w/ installation kits that include several different sleeves to match the outer diameter of your existing shifter "shaft(?)" and the i.d. of their product.

The knob will bottom out when you slide it over the shaft/sleeve, then you just tighten up a few set screws to center it. (I looked at a few different knobs, and they all seemed like the same installation).

It's dirt simple, and the whole job took less than 5 minutes... MOMO shifters come with the appropriate allen wrench.