deeper than DAR?

[hedgiesfu]

thanks to everybody for all the info thus far, i ask for it again

i took off the alternator to inspect for dar. there was no play in the mechanism and no alarming noises as i turned it round.
so i put it back on and went a tootle, drilling noises still present. i did however realise that the alternator is turned by a cog which seems to receive its drive from behind the clutch basket. could a foul bearing be in play?
is this the case and something worth investigating?

thanks in advance
picker of brains

[GavD]

Someone may confirm this but i think there are 2 possible reasons for DAR.
1. On the Alternator, the engine end of the shaft, the bolt holding the 4 finger drive plate comes loose and the plate rattles on the splined shaft.
2. The drive shaft from the clutch end into the alternator housing comes loose in some way. I think it's usually the clutch end bolt. I believe the earlier bikes had a shaft that had a bolt either end, and the later ones rectified the problem by have a nut and bolt that went all the way through a hollow shaft. There is a kit available to change to the later setup.

[hedgiesfu]

i think you might be on to something with the latter cause there GAV
like i said, there seemed to be no play in the drive plates and the cush drive rubbers looked fairly new,
you've confirmed my suspicion with the clutch side of things.

tell me, above the clutch casing, behind the engine number, there is the housing for the alternator drive, in front of the housing are four torx head bolts, do these play a similar role to the cam retaining brackets? i.e holding the alt drive shaft in place?

[GavD]

http://www.worldoftriumph.com/triumph_motorcycle_parts_locator.php?block_01=&block_02=100058888-1-2&block_03=23773 (http://www.worldoftriumph.com/triumph_motorcycle_parts_locator.php?block_01=&block_02=100058888-1-2&block_03=23773)

I think you're talking about the bolts that hold the two crankcase halves together.

[hedgiesfu]

Turns out the drive chain was way too tight
Sound disappeared as soon as the chain was drawn forward
Thanks again for all the info troops
Steamroller says thanks too

[Sin_Tiger]

Well done young man 

[hedgiesfu]

cheers sin, i'm just glad i never buggered the gearbox bearing

[threepot]

cheers sin, i'm just glad i never buggered the gearbox bearing

That was my concern when I had a 'whining' noise from that area a while back. Turned out the sprocket casing was full of crud,and the chain was running through it!

[nickjtc]

Turns out the drive chain was way too tight
Sound disappeared as soon as the chain was drawn forward

Been there and done that. Unfortunately it hooked the front sprocket. We live and learn!