I'm an owner of Yamaha Fazer 150cc.When the showroom gave me the bike,they told me that only 1 headlight can be switched on at a time.One is for low beam and another for high beam.But I saw 2 limited edition Fazers with both headlights on as low beam just as R15.Has anyone tried putting R15 battery to Fazer?Is the battery backup good?Please help me out......