Im new & need advice !engine management light keeps coming on at about 6000 revs

[coolhandluke]

The other day i ragged the bike in 1st past a restaurant full of customers just cos im a divvy and since then karma's been a bitch and most times i take the bike past 6000 revs in gears 1,2 and 3 the engine light pops on but then goes once i stop accelerating hard. Any one got any ideas as to why it may come on? it is probably due an oil change and new spark plugs so i will see how it goes once ive changed them.  Im new to FOC-U so hi to all  .