Engine still on the bench.
I decided that since I had stripped it down that far, I better sort the noisy gearbox. That way, hopefully, it won't have to come down again. Last thing I wanted to do, as it meant spending money I haven't got but it seemed only logical.
As I have said, I found a couple of things wrong. A missed out spacer on the selector claw shaft, which had caused the shaft to move and had distorted the centering spring. That would have caused the odd feel to the gear change but probably not been the cause of noise.
Can't see anything wrong with the gears themselves, but the primary chain seems very slack; over an inch of slop doesn't seem right to me but I can't find any dimensions anywhere to tell me the wear.
Comparing the old chain to the supposedly 20K chain I put in it, there seems to be absolutely no difference at all.
So, two conclusions.
First : both chains are good, in spite of the high miles on the original.
Second: both chains are bad, in spite of the assurances as to the mileage on the newer one.
The second is the only logical one, since there is a lot of noise from from that area.
The tensioner also seems to be a totally rubbish design; biggest problem is I don't know what the original shape of it should be. I mean, whether is is worn out or not. Very difficult to tell from the drawings.
So I've had to bite the bullet here.
The tensioner blade is a discontinued part (of course!) and you
really don't want to know the price of a OEM chain
. (oh, all right then. Sit down first! 227 euros/$ 330 )
New tensioner blade coming in from that amazing guy Peter Janssen at
http://www.pietparts.nl/. He always seems to have the most obscure parts, and at the right price too.
New non-OEM primary chain coming from David Silver.
With that lot plus the gaskets etc bang goes another nearly 200Pounds / $330 !
