Why motorcycle 50-60 speed after started shake
how to maintain my Bajaj Discover DTS-i 100cc bike
@harikall if the wobble is felt in the handle bars and goes away if you use both hands pushing somewhat against the bar, then it could be the stem bearings. Otherwise there are a few more possibilities. Could be caused by a bad tire, bad wheel bearing, and an out of balance wheel. Easiest would be to start by getting the wheel professionally balanced. As for maintaining your bike, here is the maintenance chart PMChartDiscover100.pdf
I've heard of front tire ply separation causing this problem. Try setting the bike up so that the front wheel can be spun and watch for a wobble in the tread. I would also look for a wobbling rim caused by a loose spoke or bent rim. A dial indicator would help with this check.