It may be tempting to scrimp and save on the clothing after spending lots of cash on your bike but what you wear when out riding is your only protection against injury should the unfortunate happen.
Whether you're commuting or out for a weekend ride. On a scooter or a supersports bike. A short slide on tarmac (even at 30mph) will shred clothes and then take skin down to the bone in no time.
Quality kit really can save your skin.