Re: How many miles before clutch pads needs replacing
As others have said it's random. I have 2000-3000 miles on a stock orange set. They have outlasted the engine. Adjust the clutch properly, get up to 10mph before engaging it and the pads should last a long time. Almost forgot, I lapped my friction plate to a nice shine with 600 grit sandpaper. That probably helped a bit.
And don't forget to clean the pads and plate now and then. Rubbing alcohol works great for them.