05-01-15, 01:19 PM
Slacken the cable a bit. If there's too much tension on the cable from being adjusted too tight it's as if you've got the lever slightly pulled all the time so it slips. Do you have to release the lever quite far before it engages? That would be another tell tale sign that it's adjusted too tight. It could also be worn clutch plates or old oil but it's probably just the cable needs to be adjusted.
Sounds like it's not getting enough petrol at idle as the lads said. If it only runs ok with the choke pulled then it's probably not getting enough fuel at idle so that points to blocked pilot jets. Turning the idle screw all the way in is probably making it worst not helping because that opens the butterfly valve so you'd be getting more air when you need more fuel not more air. If it's been parked up for a good while then a good carb clean and put the idle screw back to normal and it should sort it.
Sounds like it's not getting enough petrol at idle as the lads said. If it only runs ok with the choke pulled then it's probably not getting enough fuel at idle so that points to blocked pilot jets. Turning the idle screw all the way in is probably making it worst not helping because that opens the butterfly valve so you'd be getting more air when you need more fuel not more air. If it's been parked up for a good while then a good carb clean and put the idle screw back to normal and it should sort it.