So how many miles and level of abuse did this particular chain take before it broke? Just interested to know - for reference.

Hard to say really...the chain visually looked fine, as I say a little discolouration on the side plates, but it was treated to regular cleaning, tensioning and oiling...?

I'm by no means a fast rider, although the previous owner was from what I have heard quite quick, but I have had it now for about 10 months and have done a few TD's on it with no issues.

Absolutely no reason for it to fail in my eyes?

So which bit failed, was it the link?

A luck escape mate, glad you're OK :D

A piccie of the no-longer-available crank case protector.

If anyone is clever enough to re-produce it, I will be happy to buy one.

Spinoli

mmmmhhhh...I feel a plan brewing:cool:

Watch this space:D

I'm going to have to open an account with you Harv.

Spinoli

I've some ally plate I'm going to use to create a rigid template (after the cornflakes packets are done with)

Then some steel plate afterwards..

Harv,

A couple of quick questions:

Are you running a 14 tooth front sprocket? - I've heard that these are harder on the chain.

Did you recover the chain and work out where/why it failed?

Little story - I met up with some guys in France for a track day, they'd gone down 2 up on a Fireplace. The chain had snapped, atomised the chain guard and cut a big slice out of the side of whole seat unit. The pillion was unhurt, but he sure was a funny colour.

Spinoli

Yes...I run a 14 on the front, but I think this is standard for my SP...and I don't belive running a 14 has any real world drawbacks for a Duke. A 13...yes definately, but a 14 is fine and recommended the world over by all.

I went back to find the chain in question he day after, but no luck despite a thorough search. Either it was picked up by someone (it is a popular route for cyclists and motorbikes so this is possible) or it had been flung into the verge by a car/lorry, so I guess I will never know the reason for the failure.

You may be interested to know, I have just received a quote back from the company that did the RHT's for me (laser cut from ally plate) and it looks like they can knock some steel guards up as in your post at a good price (laser cut from steel)...

I'm away for the weekend, but on Monday/Tuesday I will be sending them up a detailed drawing for them to use and manufacture.

I say again...watch this space.:D Form an orderly que please ladies and gents!

[Edited on 19-8-2005 by Harv748]