[blykins]

Pressure plates are designed to be used with a specific purpose and a specific air gap using a particular disc thickness. Since that Street Twin clutch that you have there is meant to be used with two clutch discs and a floater, I don't think that you will be able to use it with just one single disc.

Also, that is a custom application, and the Street Twin pressure plates are to only be used with the included flywheel. It's not a normal Long style pattern.

I can get replacement discs for you to match your input shaft dimensions and you can reuse the flywheel and pressure plate that you have.