dolau
Junior Member
Over here it is an MOT (Ministry of Trasport test every year after three years old to make sure your bike is safe to be on the road) failure to do the twin headlight conversion.
On a UK Fazer site I asked any testers or mechanics to explain why as I have just done mine and wondered why such an obvious safety measure results in an MOT failure.
For the Brits on here- this was the answer
The reflectors are different e.g. one is designed to act as low beam the other high. When you mod them so as both are on at the same time the high beam reflector is doing what it was designed to and will dazzle on coming traffic i.e. an MOT fail.
You can adjust it down but then its a trade off as every mm you go down you loose the high beam effect, even when levelled it will still dazzle slightly this is because of the reflector pattern, the simple thing is to return them to standard at MOT time. On the H4 bulb only the high beam element is used as standard the mod uses the low beam element but because the reflector is designed only for high beam pattern it will still dazzle and most fail the MOT.
The mod is and will always be a trade off and never really solves the problem of poor light this is even worse on the Mk1's which is why I did all the work on HID's some years back, HID will sort it giving you a good light with the standard one lamp/reflector for high/low beam on both MK1/2's.
On the MK1's the real problem is crap reflector design just one of the areas cut to get the bike within a budget. Strangely enough on the Jap market only 400 version which has the SAME firing and running gear as the 600 both lights are on at the same time, both fitted with H4 and work well but that version has cheaper brakes theres the budget cutting in.
These 400 import lens units are like rocking horse **** in the UK, Yam sorted this on the Mk1 face lift 02 or shark eye fairing models.
On a UK Fazer site I asked any testers or mechanics to explain why as I have just done mine and wondered why such an obvious safety measure results in an MOT failure.
For the Brits on here- this was the answer
The reflectors are different e.g. one is designed to act as low beam the other high. When you mod them so as both are on at the same time the high beam reflector is doing what it was designed to and will dazzle on coming traffic i.e. an MOT fail.
You can adjust it down but then its a trade off as every mm you go down you loose the high beam effect, even when levelled it will still dazzle slightly this is because of the reflector pattern, the simple thing is to return them to standard at MOT time. On the H4 bulb only the high beam element is used as standard the mod uses the low beam element but because the reflector is designed only for high beam pattern it will still dazzle and most fail the MOT.
The mod is and will always be a trade off and never really solves the problem of poor light this is even worse on the Mk1's which is why I did all the work on HID's some years back, HID will sort it giving you a good light with the standard one lamp/reflector for high/low beam on both MK1/2's.
On the MK1's the real problem is crap reflector design just one of the areas cut to get the bike within a budget. Strangely enough on the Jap market only 400 version which has the SAME firing and running gear as the 600 both lights are on at the same time, both fitted with H4 and work well but that version has cheaper brakes theres the budget cutting in.
These 400 import lens units are like rocking horse **** in the UK, Yam sorted this on the Mk1 face lift 02 or shark eye fairing models.