Ive got a klx143 and have had a couple problems getting it started. Firstly with the kickstarter it sounds like its not engaging with the engine very well (trying to get it to start) and usually has a sound like air is being blow out of my carb. Secondly, when I do eventually get it started it only stays running if i keep the revs up...if i stop the bike will turn off after a couple seconds. Would i have to change the idleing from the screw on the carb or something to make it higher revs? The carb is a 26mm mikuni