Donate!
Welcome, Guest. Please Login or Register :: View Members
Pages: 1 2 
Send Topic Print
riding on highway , heard whirling sound and died (Read 147 times)
LS650THUMPER
Junior Member
**
Offline

SuzukiSavage.com
Rocks!

Posts: 61
Ma
Gender: male
riding on highway , heard whirling sound and died
06/08/21 at 17:28:15
 
riding on highway , 65 mph ,,heard whirling sound and bike died,
no clunk or bang sound,. bike cranks but no start, has spark. Notice spark plug is damaged, looked at valve inspection holes and rockers seem to be moving.. , used starting fluid to see if it would start and it backfired .. I'm thinking it somehow jumped timing... TDC marks seem lined up on left crankcase .
used a scope in spark plug hole and piston seems ok has some dents but no holes in the top
Back to top
 

197247071_937818707006917_6539851334709529431_n_001.jpg
  IP Logged
verslagen1
YaBB Moderator
ModSquad
*****
Offline

And Though She Be
But Little She is
Fierce!

Posts: 27508
L.A. California
Gender: male
Re: riding on highway , heard whirling sound and d
Reply #1 - 06/08/21 at 17:36:17
 
guessing from the apparent age of the plug, it failed.
make sure all the bits and pieces are gone.
Back to top
 
 

WWW   IP Logged
LS650THUMPER
Junior Member
**
Offline

SuzukiSavage.com
Rocks!

Posts: 61
Ma
Gender: male
Re: riding on highway , heard whirling sound and d
Reply #2 - 06/08/21 at 17:55:44
 
don't think it was more than one year old
Back to top
 
 
  IP Logged
Gary_in_NJ
Serious Thumper
*****
Offline

LS650 Cafe Racer

Posts: 2262
Amongst the Twisty Roads
Re: riding on highway , heard whirling sound and d
Reply #3 - 06/09/21 at 09:10:56
 
The "whirling sound" started when the bits of spark plug got caught in the valve seat causing a loss of compression. The seat is probably now damaged. A leak-down test is required for further diagnosis.
Back to top
 
 

A life-time student of motorcycling. LS650 Cafe, TS-Z400, FZ6
My LS650=> http://suzukisavage.com/yabb2.2/Attachments/Left.JPG
  IP Logged
DragBikeMike
Serious Thumper
*****
Offline

SuzukiSavage.com
Rocks!

Posts: 2110
Honolulu
Re: riding on highway , heard whirling sound and d
Reply #4 - 06/09/21 at 10:53:13
 
Certainly looks bad.  Spark plugs don't just fall apart.  You said there are dents in the piston.  The LS piston sits well away from the top of the cylinder at TDC.  Something had to be way out there for contact with the piston.  As you mentioned, may have jumped timing.  Could have also been an exhaust valve sticking.  Something hit that spark plug.  You can't tell anything by just looking at the timing marks on the end of the alternator rotor.  You need to know where the cam is.  Easiest way to check is just throw a compression gage in there and crank it.

Good luck.  
Back to top
 
 

Knowledge is power.
  IP Logged
LS650THUMPER
Junior Member
**
Offline

SuzukiSavage.com
Rocks!

Posts: 61
Ma
Gender: male
Re: riding on highway , heard whirling sound and d
Reply #5 - 06/09/21 at 19:05:54
 
tonite drained oil...clean ,,  no metal pieces , pulled off right side cover just to see if cam chain and all was ok . everything on right side seems ok. will look at left side tomorrow
Back to top
 

199259148_239423334192115_4841813340056730436_n.jpg
  IP Logged
Gary_in_NJ
Serious Thumper
*****
Offline

LS650 Cafe Racer

Posts: 2262
Amongst the Twisty Roads
Re: riding on highway , heard whirling sound and d
Reply #6 - 06/10/21 at 06:34:28
 
You find pulling covers off easier than a leak-down or compression test? A leak-down test will point you DIRECTLY to the problem.
Back to top
 
 

A life-time student of motorcycling. LS650 Cafe, TS-Z400, FZ6
My LS650=> http://suzukisavage.com/yabb2.2/Attachments/Left.JPG
  IP Logged
LS650THUMPER
Junior Member
**
Offline

SuzukiSavage.com
Rocks!

Posts: 61
Ma
Gender: male
Re: riding on highway , heard whirling sound and d
Reply #7 - 06/10/21 at 17:36:13
 
reason I'm taking covers off is to see if any damage, last two oil changes had small metal pieces in pan. figure better to have a look at it before I toss it in a scrap metal dumpster, or make it a boat anchor
Back to top
 
 
  IP Logged
Hiko
Full Member
***
Offline

SuzukiSavage.com
Rocks!

Posts: 195

Re: riding on highway , heard whirling sound and d
Reply #8 - 06/10/21 at 19:50:43
 
LS650THUMPER wrote on 06/09/21 at 19:05:54:
tonite drained oil...clean ,,  no metal pieces , pulled off right side cover just to see if cam chain and all was ok . everything on right side seems ok. will look at left side tomorrow


Looking at that from the other side of the world it looks real dirty in there and the cam chain adjuster is about to do its grenade thing
Back to top
 
 
  IP Logged
DragBikeMike
Serious Thumper
*****
Offline

SuzukiSavage.com
Rocks!

Posts: 2110
Honolulu
Re: riding on highway , heard whirling sound and d
Reply #9 - 06/10/21 at 23:48:11
 
Good eye Hiko.  I agree, the tensioner is ready to fall apart.

LS650Thumper, where is the ground electrode off your spark plug?  Have you retrieved it from inside the engine?  Could it possibly be in your muffler?  Shake the muffler and see if you can hear anything rattling around.  I usually pull my header pipe when I remove my clutch cover.  If you did that, this would be a good time to look into the exhaust port and check out the exhaust valves.  
Back to top
 
 

Knowledge is power.
  IP Logged
LS650THUMPER
Junior Member
**
Offline

SuzukiSavage.com
Rocks!

Posts: 61
Ma
Gender: male
Re: riding on highway , heard whirling sound and d
Reply #10 - 06/11/21 at 16:50:55
 
header off !!exhaust is open so think its long gone !
both cases are off , haven't taken the top off yet !!
Back to top
 
 
  IP Logged
Dave
YaBB Moderator
ModSquad
*****
Offline

SuzukiSavage.com
Rocks!

Posts: 16199
Camp Springs, Kentucky
Gender: male
Re: riding on highway , heard whirling sound and d
Reply #11 - 06/12/21 at 09:16:46
 
LS650THUMPER wrote on 06/11/21 at 16:50:55:
header off !!exhaust is open so think its long gone !


Spark plugs don't normally destruct on their own - something likely came loose and got between the piston/head/spark plug.  It is odd that you didn't hear clanking and banging.

There have been a few engines with the exhaust valves coming apart -  one of the valves comes apart for some reason.  The exact reason has not been found and some claim it is a valve that doesn't have enough clearance and it never seats properly to cool down and it overheats....while there is also some claims that a valve that has too much clearance can drop heavily onto the seat and overload the stem. Having too lean of a fuel/air mixture is also a potential cause.

If you like the bike and want to keep it - having to replace a head and piston is not a horrible event, as it gives you an excuse to do the Wiseco piston upgrade and some porting on the head!  
Back to top
 
 

Someday I will be old......But not today!

  IP Logged
LS650THUMPER
Junior Member
**
Offline

SuzukiSavage.com
Rocks!

Posts: 61
Ma
Gender: male
Re: riding on highway , heard whirling sound and d
Reply #12 - 06/13/21 at 13:28:27
 
ok the exhaust valve went south !!!
if your close to Massachusetts 500 bucks takes the carcass / Forked by frank , 4" longer forks,  31+++miles
Back to top
 

198832313_520089435854026_9154838395863060359_n.jpg
  IP Logged
LS650THUMPER
Junior Member
**
Offline

SuzukiSavage.com
Rocks!

Posts: 61
Ma
Gender: male
Re: riding on highway , heard whirling sound and d
Reply #13 - 06/13/21 at 13:30:07
 
piston
Back to top
 

200301950_4529821557048546_6698697767534137237_n.jpg
  IP Logged
LS650THUMPER
Junior Member
**
Offline

SuzukiSavage.com
Rocks!

Posts: 61
Ma
Gender: male
Re: riding on highway , heard whirling sound and d
Reply #14 - 06/13/21 at 13:32:29
 
2002
Back to top
 

47347587_10215737375100254_7466289873700257792_o.jpg
  IP Logged
Pages: 1 2 
Send Topic Print


« Home

 
« Home
SuzukiSavage.com
06/16/21 at 07:29:11



General CategoryRubber Side Down! › riding on highway , heard whirling sound and died


SuzukiSavage.com » Powered by YaBB 2.2!
YaBB © 2000-2007. All Rights Reserved.