I didn't get a rectifier with my 2003 R1 engine and obviously need one. Getting hold of a 2003 R1 rectifier is proving a time consuming and potentially expensive business so...

All a rectifier does is convert what ever you get out of the alternator to 12V, right? Therefore any rectifier is going to contain a load of diodes, some voltage regulators and a big heat sink. Therefore will any 12v rectifier do the job for me or do I specifically need one matched to my bike engine?

Thanks,

Mark

Any bike shop will sell you a spurious rectifier,that fits any bike. think i paid about £38 for the last one, its in my toolbox as a spare, i traced the fault to a bad connection.

Al.



Originally posted by dern
I didn't get a rectifier with my 2003 R1 engine and obviously need one. Getting hold of a 2003 R1 rectifier is proving a time consuming and potentially expensive business so...

All a rectifier does is convert what ever you get out of the alternator to 12V, right? Therefore any rectifier is going to contain a load of diodes, some voltage regulators and a big heat sink. Therefore will any 12v rectifier do the job for me or do I specifically need one matched to my bike engine?

Thanks,

Mark

quote:

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Originally posted by Wadders
Any bike shop will sell you a spurious rectifier,that fits any bike. think i paid about £38 for the last one,

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three yellows, red and black, yellows any order to the engine, red to battery, black to earth, anyone will do, just get a substantial looking one from ebay for a 12v bike, ie one with cooling fins. Mines got a Ducati on a honda, my bikes got a honda transalpine on a fireblade. Its only taking 3 phase AC via a bridge rectifier and turning it into dc.

Regards Mark

If you go scrappy hunting just make sure it's a well heat-sinked rectifier or at least its got a nice large piece of metal on the bottom that you can bond (with heat transfer paste) onto something big made of aliminium to radiate away the heat- they chuck out a fair bit of heat and if inadequately cooled can go pop and let out the magic smoke!!!

Nice one, thanks guys.

rectifier and voltage regulator are 2 different things.

I used 6 fat doides mounted on aluminium ange (heatsink) to rectify output on my Z1000 A1 - pennines compared to a new one. (I think the voltage regulatr is suspect though).

any way, rectifier convers AC electricitiy, as what comes out of the alternator into DC; car and bike alternators seem to be 3 phase so you need 6 diodes.

voltage regulator takes electricity and clamps it down to a specific levle, usally in car and bikes this is around 12 V.

Some alternators combine both in one unit.