! My Kawa 900 headlight has always been poor ( = DIM ) despite it being a Cibie unit with a Tungsram H4 60/55 bulb .... but because I don't ride it at night, well I'd just forgotten about it but due to boredom here... I decided to have a look today & here's the findings that I guess are required to make some sort of evaluation ???Battery is a quite new Yuasa and at rest (across the battery ) Ignition Off = 12.6 v with Ignition On & lights Off = 12.4 v and with light on = 11.6 v . Fired up ( across the battery @ 1500rpm with Lights off it's charging at 14.2 v and with Lights On = 13.5 v ) I'm running a 6 wire Wet Dream Rec / Rect too with positive 12v reference line hooked up with the back brake light switch feed supply wire ....& all seems OK there.
Heres where it all goes wrong ! Having checked ( googled ! ) that my wiring to the bulb spade connections are all sound and correct & there is some ambiguity there... but the general take is...mines wired correctly - so at the headlight bulb connector ...it's a 3 pin multi and looking straight on at the back side = 'connector spades' of the bulb itself = ( Horizontal spade at the top = Low beam ) ( R/H side Vertical = High beam ) (L/H side Vertical = Earth ) I measured the voltage at the Headlight bulb plug connector with the plug DISCONNECTED from the bulb... and get 11.6v on both beams .....BUT as soon as the plug connection is mated to the bulb itself the meter then drops & reads 8.7 v so I guess this why there both showing dim ! I then fire the motor up and it's then getting 9.7 v there at the CONNECTED live terminals . I did then try running in tandam another earth wire from a good ground at the engine ...to the bulbs earth spade & it made no difference.
Excuse the pun...but if any one can shed some light on this trickery
......I'd appreciate it ! Thanks from Little Johny at the back of the Class .
