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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by George Guille, It's going to be a long 300km... Bolivian Amazon

I haven't been everywhere...
but it's on my list!


Photo by George Guille
It's going to be a long 300km...
Bolivian Amazon



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  #16  
Old 24 Nov 2009
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Originally Posted by Pigford View Post
Just checked voltage - just over 12v, so spot on

I think its coz its a small unit & only designed for 35w of power/heat

Its also made of plastic just a pretty naff item

Its typical Italian electrics..... not the usual quality you expect from the Japs!

I've seen a 45/45w bulb, so may give that a go as its only £5
Hmm, melted contacts ?? On the actual bulb ?

Sounds like its sucking in way too many volts but you have checked this .. HMMM !!

All the other electrics on the battery fine ?? Battery holding charge, starts ok ?? I think either the wiring just aint built for that amperage or you have another problem..

Electrics was never my strongest point !
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  #17  
Old 24 Nov 2009
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Quote:
Originally Posted by Pigford View Post
Just checked voltage - just over 12v, so spot on

I think its coz its a small unit & only designed for 35w of power/heat

Its also made of plastic just a pretty naff item

Its typical Italian electrics..... not the usual quality you expect from the Japs!

I've seen a 45/45w bulb, so may give that a go as its only £5

Pigford, did you measure the voltage with the engine running at maybe 3000 – 4000 RPM’s? I haven’t been messing with the electric stuff in the TT, but 12 volts sounds a little low, 13.5-14 volts is more like it. At 12 volts the battery won’t even charge.

Although - If the wires towards the headlight are a little thin, that might explain the dropped voltage.
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  #18  
Old 24 Nov 2009
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Originally Posted by G600 View Post
Pigford, did you measure the voltage with the engine running at maybe 3000 – 4000 RPM’s? I haven’t been messing with the electric stuff in the TT, but 12 volts sounds a little low, 13.5-14 volts is more like it. At 12 volts the battery won’t even charge.

Although - If the wires towards the headlight are a little thin, that might explain the dropped voltage.
They can be 12v at the bulbs.. After voltage drop, regulation etc but yes, he should definately do what you suggested !
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Old 24 Nov 2009
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Read this....

Melted headlight connector - ADVrider
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  #20  
Old 25 Nov 2009
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ok i'm just back from the pub but if the bulb contact is melted the current draw is too much for the surface area of the contact point or the load is not dissapated correct ie: earth connection

hot bulbs are fine as long as the area they are heating (lens) is either big enough or getting cooled by air movement over it

voltage should be measured across the battery as it's the most stable reference point and should be done at mid revs to give a realistic figure.

i'd recomend sticking a spot light on the front for high beam use and only resort to the standard bulb for highway use
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  #21  
Old 25 Nov 2009
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Thanks for all the input guys.............

I'll try & check it with a more accurate meter, my one is a 12yr old cheapy!

Had no probs today with the 35/35w - apart from the fact, on the way home IN THE DARK, I couldn't see f**k all.
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