Sprocket Fail at 200km/h

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vespa understood but gearboxes go pop, engines seize despite maintenance, and Don by misalignment I mean fasteners coming loose on a hybrid sprocket but Im guessing. Anyway very very lucky guy that the chain didnt lock the wheel up or break a case open
 
If it had a dupersprox on it and it came apart where is the alum center?

I think someone is messing w you

I have a negative critical fault finding mind and I call bs - i just can’t see it vanishing

If you really lost yer sprocket sorry for your loss and not buying yer story
 
Yes Don, in addition to what Paul said you can have lateral alignment issues in the parts themselves when mixing different Mfg parts. Do a search on the sight. Also, the part you keep referring to as a “cover” is actually called a flange. The flange mates to the drive pins which mate to the Cush drive pieces which mate to the carrier in a 2 piece setup (carrier/outer sprocket ring or the sprocket in a non 2 piece system. All these pieces need to work together laterally or you can have alignment issues. There are many examples of this on this sight. You get a flange from one Mfg and a carrier from another and drive pins from another and you better check the compatibility on assembly. They are all a little different. Additionally you can correct lateral alignment on these bikes somewhat by changing the spacer that goes between the flange and the bearing spacer. Don, perhaps a bit more reading and a bit less posting. The technical “help” that you are attempting to provide in many of your posts needs a bit more polish but I know you mean well.
 
Polish deez

Drive pins? For those of you that didn’t know you get drive pins the same place this guy got his disappearing sprocket story. No such part exists

Flange. Cover. Flange cover. You are correct Ducati calls it a flange. Most aftermarket companies however refer to it as a cover. Drive Systems calls it both for just that reason. It’s not like I pulled the name outta my ass.

Drive pins. Ha
 
the rear sprocket flange drives the sprocket through the cush drive bearings, in the pic the cush drive bolts are intact, whats missing is the sprocket and sprocket carrier if supersprox type 2 part. What I am suggesting is that the 2 part sprocket had the issue. All a bit weird, one thing for sure its not the oem part that failed. Oem is massive and solid. Don may be right, it could be ........ as there is no damage on the swingarm but there is evidence of wear on the drive flange.
 
Yes Don, drive pins. They are even called “drive pins” on the mechanical drawings. They can be stand alone (cushion impregnated) or part of a multi piece unit such as this AEM kit.

You know Don when I see your posts I get the image of some guy that read a lot of Hot Rod magazines in the 70s and I’m sure you are pretty handy with a screwdriver and a Holley 750 but this 2021 my friend and it is quite apparent from the questions that you ask and advise that you attempt to give that the rest of the forum members need to crowd fund and buy you some reference material because you sir, seem to have a lot of spare time and in the case of Ducati Motorcycles, could certainly use some.

Maybe there is a Motorcycle Mechanics Institute in your area. There are no chicks there but you might pick up some tips that would make your posts more relevant. Just and idea
55E6AAFA-2AEA-45CD-BCAB-41D1D14F42B3.jpeg
 
Didnt Don14 used to drag some bikes back in the 90's? .... is he must be in his 70's now so yeah like Vespa says its 2021 too much talk and not enough reality.
 
It is a basic setup yes and he had all 100% stock parts on the bike. Went back looked at the pic again its pretty obvious the bike lacked major maintenance its a mess but looking close there is absolutely no way the stock sprocket (one piece) would have broke apart and left the cush drives, axle, swingarm and wheel in that condition. There would have been way more damage involved so something is not making sense.
 
Mick1976 said:
It is a basic setup yes and he had all 100% stock parts on the bike. Went back looked at the pic again its pretty obvious the bike lacked major maintenance its a mess but looking close there is absolutely no way the stock sprocket (one piece) would have broke apart and left the cush drives, axle, swingarm and wheel in that condition. There would have been way more damage involved so something is not making sense.
Click to expand...

could be a little attention whoring?
 
No Way. I'd have to see it in person top believe that happened. If that chain was loose while the bike was on the gas it would have destroyed the left side of that bike before it was stopped, not laying on the swingarm intact.

Things must be pretty slow over on the squid boards,
t_bare
 
Paul G said:
Most of the time especially on technical forums you always try and give the benefit of the doubt but Im definitely in the it's ........ camp now.
Click to expand...
Yeah, me too, but the story of 200kph at a 2 to 3rd shift would have had that motor singing. The speed that chain would have be slinging around the countershaft would been insane. The chain and swing arm aren't even scratched. The swing arm, and left side of the motor would be toast. The oil would have leaked out and the engine seized. The "missing" sprocket would be the least of his worries.

t_bare
 
Mick you’re constantly complaining there’s no moderators to police this forum.
So a member goes and creates another modded forum to address the issue and you still talk .... about it.

Figger it out.
 

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