hey mate know ur problem... i got a brass button clutch in mine... when an unco drives it they chirp up and down gears 1st, second, 3rd, 4th.... its not good for your driveline and puts extra strain on everything..... allow for the clutch because they bite really hard..... be softer with your left foot and take your time... take off with low revves and correct your gear changes... u will accustom to the brass button soon just take time and care and allow for it.
try not to ride it either otherwise it will chew out quick