you really need to give more details dude!
start by taking the fly wheel off and giving it a good clean and a puting it back together as it came off.check all the earthing points and clean them up by scratching them with sand paper, these are basicallywires attached to the frame, also the back of the coil where the screws go through and hold it to the frame is another place where the coil earths take the connectors apart one at a time and give them a good squirt with wd40 just in case they have got wet at any pointand this also helps to protect them if you get caught out in a downpour rainey conditions.
good luck graeme
graemedixon34@msn.com
April 2007