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Discussion Starter #1
Hi boys and girls, this morning my twin failed to start due to a flat battery. I completed a 150mile round trip Saturday, left it for a day and this morning nothing. I have checked the charging rates;
At idle, no lights- 14v ish:D
With headlights and projector beams- 12.7v ish (not good):(
As above but with heated grips- 12.7v ish (still not good):(
If I increase the revs from idle with everything on, it runs up over 17v, sometimes touching 18v... :confused:
If I turn the grips off, but all lights on and reving, it stays around 13v.
So....... Heated grips knackered, or CDI kaput?:confused:
 

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I would suspect a dodgy Reg /Rec, or one about to die.
 

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Wot Stumpy said - with an outut of 18v when revved, yer reg/rec is fried.
Changed it before it cooks anything else (your battery may well have been goosed already :()

Electrex do a replacement - google to find them.

Steve T

:cool:
 

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what they said.. change it before it frys your CDIs :hitler:

Got one of Ebay its from a CBR600RR fits no probs but you have to change the connectors or wire it indirectly.. £24 nae bad

the best option is the new style FH type as used on R1s they run cooler as they are not SH .. i.e. shunt type.. the one I got is an SH but its runs cooler than the old one and give 14.3 V and not 12.3 :thumbup:

check the site.. loads of info on here

or this may assist
Charging System Diagnostics - Rectifier/Regulator Upgrade - Triumph Forum: Triumph Rat Motorcycle Forums
 

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Discussion Starter #5
Right, looks like I need a new rectifier then. Stupid question I know, but where should I buy one, how much should I pay and where on the bike is it, and what does it look like!?
 

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The test conditions for the charging system are:
-Engine at normal op temp
-Low beams on
-Engine at 5.000 rpm

The Charging Voltage as measured at the battery terminals should be between 14 and 15 V.

This if an RD07A and is off the official Shop Manual.

Note that if you DMM's internal battery is discharged, you'll get wring readings.
 

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Discussion Starter #8
Ah I'm back! Sorry, my laptop went all lemming and I have only just got it back! Thank you for all your replies, I will buying a new rectifier on pay day. Anyone know where I can get one?
 

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Bought new battery and measured charging rates:
12V at IDLE
14.5V at 5000 rpm (light off)
12.5V with lights on at 5000rpm
this voltage is measured as max, it doenst go any higher even with 10000 rpm

Conclusion? Is my Rectifier dead?
Strange to me is that only with lights on it doesnt go higher than 12.5V
 
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