What happened, oh yeah... Hi!

[hpras]

Hi all, first time post.  I'm an ex-Vision owner, really enjoyed the bike back in the 80's and 90's.  Took me lots of places.  One summer I let my nephew use the bike and this was the result.  This was in 1996, just tore into it last week out of curiosity.







and



on the rear cylinder.  Looks to me like the cam chain quit spinning, it was in good shape, and if I spun it it wasn't connected to anything else.  That ended the post-mortem.  Anyone heard of this??

Anyway, might as well post a couple pics of the rest of the fleet.



and the daily driver



Cheers from the great white north (it's snowing....)

Hans

[QBS]

What was the rpm at the time of the event?  Welcome to the forum and thanks for the pictures.  Sad, but facinating none the less.  What is the silver  bike in the middle?  Cheers.

[hpras]

with my nephew back then, who knows.  He had an RD350 he took a loan out for for 5 hours before he totalled it......  He's a bit better now.

The Grey bike in the middle is a grey bike.  A 1987 Suzuki GSX400X Impulse, 400cc 4 cylinder, air, oil, and water cooled.  Pretty fun little bike.  The little bike on the end is a 1971 Yamaha AS3, 125cc twin.

[fret not]

I would be checking the condition of the rod for that cylinder too.  It may be OK but should be inspected.

Looks like time to transplant another rear cylinder and all that goes with it.

Good pics.  Hope you enjoy the challenge.

My guess is something happened with the cam chain slipping time, which is when the piston pushed the intake valves into the cam and broke it.

[Cdnlouie]

Nice bikes! Welcome to the site!  It does look like the nephew factor may of had a lot to do with it. If you need barrels and head I think Tiger could help you out. Check the cam chain tensioners to make sure they are working properly and don't have damage.  If the tensioners are bad then a high rpm could jump the chain.  Usually it makes a bit of a rattling noise if they are not doing their job or are damaged.

What took you so long?  :o

[Rikugun]

Looks to me like the cam chain quit spinning, it was in good shape, and if I spun it it wasn't connected to anything else.  That ended the post-mortem.  Anyone heard of this??

So the chain is in one piece but moves as if not connected to the crank? Did you pull the stator cover and rotor to see if the cam drive gear's key is sheared? Is the rev limiter wire disconnected?

Nice fleet of bikes BTW and welcome!

[Tiger]

Hi and welcome to your new and extended family... 8)

Sorry about your Vision motor...but not the end of the world. I have plenty of engine parts and 5 motors (less carbs, starter motor & flywheels!!) sitting around here!!! as well as most other Vision parts...  ;)

Where abouts are you located...??

BTW...Nice FJ 1200. I have an '85 1100 and love it 8)

             8) ....... TIGER ....... 8)

[Rick G]

Its an unusual failure , Vision cam chains are of the HYVO type and are nearly indestructible.