Hi Ginox2, so i understand correctly, you're talking specifically about the clutch pedal, not your actual spinning "clutch" within your transmission, getting stuck?
You explain that your 2007 civic si has an exedy stage 1 clutch, and you also recently replaced your "clutch" master and slave cylinder's. I have two suggestions for you to inspect and potentially make minor changes to.
- First, check your fluid level. Did you perform a good "burb" of your system? Simply put, ensuring all the air is bled out of your clutch fluid system is not only critical, but its important to remember to flush as well.
- Secondly, have you adjusted or checked the set screws at your actual clutch pedal under your dash. Adjusting the engagement to an OEM spec, or to favor engagement and longevity i recommend youtube, and some trial and error. Note, checking the set screw is a good check to ensure that over time your adjustment hasn't changed and changed your pedal.