My agility was like that 2 weeks ago and also getiing harder to start so i put 100ml of redex petrol treatment in with a full tank of fuel and after i had done about 50 miles my scoot has a new lease of life, stats first time again and runs like new. I purchased the redex from asda only £2 for a 500ml bottle from now on i will add some every 1000km.....