transmission issue

[malay]

Anyone having problems that I am having: Whenever the nomad sits for a while, sometimes overnight, mostly days or a week, I start the bike up and when I shift into first gear the bike lurches forward and dies. I restart it and it shifts find. Bike lurches very bad. I have tried pulling in clutch and shifting it in and out of gear with bike off before starting, trying maybe to lubricate gears, no luck. Any suggestions?