hi, just wondering if anyone can help me with this problem im having. Every time my bike sits in the shed for a period of time, i have trouble starting it. It seems to foul the plug. After taking it out, cleaning it and putting it back in, it starts with choke on for 30sec. Press choke in it runs rough, so i have to hold the rpm up probably 4000rpm. It also blows blue smoke when i get on and off the throttle. Could the valve clearance be out causing these problems or could i have a bigger problem? The bike has 2000kms and has been looked after. Regards Pete.