was wondering if anyone has had this problem when started up from cold, with choke on or off. The bike smokes and splutters and will not rev out properly. Was wondering if anyone knows what hte plug gap should be as i cant find this information anywhere. I am running a 60:1 mixture with silkolene comp 2 ester synthetic. could be the oil mix. Does anyone use this oil is it any good any help would be appreciated. bike takes around 10 mins till it runs properly then it seems to run fine apart from it seems to slow down on its revs at tickover and sometimes stalls.