I have a problem with my bike in that it appears that there is either a fuel starvation or an electrical breakdown that causes the bike to cut off and then pick up again.It does not matter if the bike is hot or cold and it does not always occur.Some days one can ride perfectly and then other days it happens frequently in a short distance.The revs drop and the bike jerks but then seconds later it picks up again-anybody have an idea what I could check for ?