Good catch!

[pete roper]

My mate Peter in Townsville pulled the gearbox on his bike, no mean feat as its part of a pretty impressive sidecar rig, and found this.



Nice catch as it wasn't far off blowing and Peter rides this thing all over Oz's Eastern states often visiting us in Bungendore via the 'Western Route' which includes large stretches of urine drinking territory!

Pete

[KiwiKev]

Geez Pete, I thought I was lucky to catch mine before it blew up but that takes the cake. Was he having clutch issues ?


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[oldbike54]

 OH MY ! Not gonna do a duct tape and zip tie fix on that 

 Dusty

[screamday]

Wholly Crap!! 

[Flea]

How many miles was on that?

[Shorty]

Is that red dust or faulty heat treat....

[pete roper]

How many miles was on that?

Jesus wept! Why is that always the first question asked by the paranoid who assume that every bike is going to behave exactly the same!

The twin plate clutch is generally pretty bulletproof. There have been odd batches of poor plates, it's luck of the draw. Also it will depend on how it is used. As I said this one is out of a big, highly developed, sidecar rig. It works a LOT harder than most clutches.

[Flea]

Jesus wept! Why is that always the first question asked by the paranoid who assume that every bike is going to behave exactly the same!

The twin plate clutch is generally pretty bulletproof. There have been odd batches of poor plates, it's luck of the draw. Also it will depend on how it is used. As I said this one is out of a big, highly developed, sidecar rig. It works a LOT harder than most clutches.

Apologies! that wasn't the intention of the question.

My V7 has 29k (Picked her up at 28k) miles on it and I just got a bit worried since I've been beating on it since I got her.

[bigbikerrick]

Do you know what brand clutch plate that is? What were the symptoms?
Rick.

[Antietam Classic Cycle]

Apologies! that wasn't the intention of the question.

My V7 has 29k (Picked her up at 28k) miles on it and I just got a bit worried since I've been beating on it since I got her.

Totally different clutch assembly on the small-blocks, plate has shock absorbing springs built in, so you needn't worry about this issue.

Do you know what brand clutch plate that is? What were the symptoms?
Rick.

It looks like what was installed at the factory. Fairly common failure of that type of plate when used hard. Softer engagement normally, but the possibility of failure is the compromise you live with. Normal warning of complete failure is the clutch starts slipping on hard acceleration - this indicates that one plate's center has already fractured and the one that's left is trying to do all of the work. When the second one fractures, you go nowhere of course. 

[guzzista]

Have had 2 clutch plate failures as above  on my Calis ( 1996 and 2003). Both bikes had about 40 k miles when it happened. Only one plate was sheared as in the above pics. In both cases the clutch would begin to slip at about 4K RPM.  To my recollection they were Surflex plates. Stein Dinse clutch plates were used s as replacement in both cases

[Sasquatch Jim]

S'not a good thing to see.

[Huzo]

My mate Peter in Townsville pulled the gearbox on his bike, no mean feat as its part of a pretty impressive sidecar rig, and found this.



Nice catch as it wasn't far off blowing and Peter rides this thing all over Oz's Eastern states often visiting us in Bungendore via the 'Western Route' which includes large stretches of urine drinking territory!

Pete

Ok guys, I'm the only one so far big mouthed or ignorant enough to ask. Having never seen one before.... What is the damage so obvious to everyone but me? Seriously! Is it the non uniformity of the heating on the friction material ?

[Huzo]

Apologies! that wasn't the intention of the question.

My V7 has 29k (Picked her up at 28k) miles on it and I just got a bit worried since I've been beating on it since I got her.

Shows my depth of knowledge, I thought it was a reasonable question..

[Flea]

Ok guys, I'm the only one so far big mouthed or ignorant enough to ask. Having never seen one before.... What is the damage so obvious to everyone but me? Seriously! Is it the non uniformity of the heating on the friction material ?

Totally different clutch assembly on the small-blocks, plate has shock absorbing springs built in, so you needn't worry about this issue.



It looks like what was installed at the factory. Fairly common failure of that type of plate when used hard. Softer engagement normally, but the possibility of failure is the compromise you live with. Normal warning of complete failure is the clutch starts slipping on hard acceleration - this indicates that one plate's center has already fractured and the one that's left is trying to do all of the work. When the second one fractures, you go nowhere of course. 

Thanks!

[pete roper]

Ok guys, I'm the only one so far big mouthed or ignorant enough to ask. Having never seen one before.... What is the damage so obvious to everyone but me? Seriously! Is it the non uniformity of the heating on the friction material ?

Peter, the cracks around the rivets that hold the splined centre to the central 'Backing plate' that the friction material is bonded and riveted to. The centre is within a bee's dick of falling out. When that happens the outer part simply rotates in the flywheel while the splined centre sits still on the gearbox input shaft boss and the bits off metal running over each other make a godawful graunching noise and there is a 'Failure to proceed'!

Pete

[Triple Jim]

The centre is within a bee's dick of falling out.

Do they teach you guys these things in school, or is creativeness promoted so they come naturally?

:)

[Huzo]

Bugger me ! My crummy eyes thought that was a pressing or some such. Thank you Peter, I'm a tad embarrassed that I needed to be told.

[dl.allen]

I think we need a sticky of roperisms with application examples

"Within a bees dick of failure"<= measureable, minimum service tolerance

[normzone]

African, or European bee ?

[pete roper]

Well if we're going to get picky I suppose it should be a 'Drone's dick' but that too would be inaccurate as being an insect a bee only has a cloaca and no external genitalia.

[tris]

I think we need a sticky of roperisms with application examples

"Within a bees dick of failure"<= measureable, minimum service tolerance

This is of course the antipodean derivation. UK English calls this dimension a Gnats Cock - I understand that the US English version is slightly bigger 

[kingoffleece]

You guys are funny!

[Zoom Zoom]

African, or European bee ?

It's not very nice to make someone spit up their coffee this early in the morning!

John Henry

[Lannis]

Apologies! that wasn't the intention of the question.

My V7 has 29k (Picked her up at 28k) miles on it and I just got a bit worried since I've been beating on it since I got her.

Seemed a reasonable question to me, too, and I don't think I'm paranoid about clutches .... ?

Lannis

[Huzo]

African, or European bee ?

Size wise, my money's on the African one !

[Ncdan]

Bugger me ! My crummy eyes thought that was a pressing or some such. Thank you Peter, I'm a tad embarrassed that I needed to be told.

dont feel bad Huz I only saw it when I noticed the gap between a couple of the cracks:(

[Huzo]

 

dont feel bad Huz I only saw it when I noticed the gap between a couple of the cracks:(

[Triple Jim]

"Within a bees dick of failure"<= measureable, minimum service tolerance

Here in the states I understand that to be the RCH.

[Roebling3]

Red IS the fastest.  R3~