Sometimes on vtech i get abit of smoke out the back. HondR say its nothing to worry about as at high revs its hard for the block to not chuck abit of smoke out the exhaust as its under such high pressure. But others say its valve stem oil seals? What are your opinions? And what is a normal oil consumption ammount? My EK does drink a fair bit of oil but i just say if it doesn't use oil, its obviosly not trying hard enough lol!