Killed my engine... BAD - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 37 (permalink) Old 07-31-2011, 12:19 AM Thread Starter
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Unhappy Killed my engine... BAD

So back on March 12th I was out on a group ride. We were riding VERY spiritedly: I had it pegged at about 105. All of a sudden I had a loss of power. Pulled to the side of the road, and as I slowed the engine died. Started it back up and there was a terrible sound in the front cylinder. Tried to limp it back to civilization, but didn't make it very far before there was a loud thud/crunch and the engine seized.

Since then, I hadn't gotten around to finding out what the problem was, simply because I just didn't want to know/see how bad the damage is.

Well, I finally started taking it apart this week. And it's just as bad as I feared.

Drained the oil and found a lot of metal flakes in the oil screen. That's a bad sign:

Got the engine out (God it's such a pain in the ass to remove the engine!) and took off the valve cover. Immediately saw that two rocker arms were not on their valves. Not sure if that happened before or after I removed the engine.

Pulled off the cylinder head, and the badness is immediately obvious:

Get the cylinder off, and it's even worse:

Plenty of metal pieces down in the bowels of the engine too:

Looks like I've got my work cut out for myself to get it going again. But I know I can get it done. Just a matter of time, money, and effort. Worst part is that I'm off the road during the prime riding season. Sucks.

I'll update with more photos as I keep going.

'95 Vulcan 750 - Purchased 8/2003 w/ 21,124 miles - passed 50K 9/3/15
* VN900 seat * Daytona handlebar * Converted ACCTs to MCCTs * Relocated R/R * Drilled clutch basket * Coastered * Repainted *
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post #2 of 37 (permalink) Old 07-31-2011, 01:17 AM
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OUCH, sorry for your bad luck, good pics though.

"Show me a man who makes no mistakes, and I'll show you a man who doesn't do things." Theodore Roosevelt."

2007 Victory Kingpin
Current projects - 1986 VN750 & 1988 EL250
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post #3 of 37 (permalink) Old 07-31-2011, 08:04 AM
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so sorry to see that, good luck with the rebuild!

1986 vn 750 aka "Huck Farley"
42,000 miles
Rick's stator and rr
Tuxedo stator cover mod
pickup coil mod
dampers replaced
agm m/f battery
Harley sportster exhaust, degoated
Hid conversion
splines lubed
custom "" grill cover
NGK Iridium spark plugs

acct to mcct mod

rekeying locks,

stator replacement walkthrough,
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post #4 of 37 (permalink) Old 07-31-2011, 08:06 AM
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Last edited by FlacoLove; 03-25-2013 at 10:07 AM.
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post #5 of 37 (permalink) Old 07-31-2011, 08:16 AM
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That sure left a mark! Hey can I use your VN900 seat while you re-build? (Figured that you needed some humor cause you got to be crying deep down inside.)
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post #6 of 37 (permalink) Old 07-31-2011, 10:11 AM
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New head, piston, sleeve rod, bearings, and that just what we can see. Might be time to part it out and buy a new bike.
Do you know what happened? Did you throw a cam chain or something?

No more Vulcan
New ride 2012 Victory hammer 8 ball
Stage 1 with Cobra 2 into 1 exhaust.
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post #7 of 37 (permalink) Old 07-31-2011, 01:12 PM
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Wow Dave, that`s a kind of bad luck, good luck story.
Bad luck that the engine broke, but good that it didn`t seize solid while you were traveling at a buck five.
That would have made the ride so much more...mmmmm...interesting....than you needed.

I will be watching to see what else you discover here, as to why it broke in the first place.
Good luck with a speedy and solid fix.


1991 VN 750 -"Cosmic Lady" or "Bad Girl"?
Purchased May 16, 2008
Approx.19,300km (12,000 miles)

H-D windshield
Relocated R/R
MF-AGM battery
Fiamm Freeway Blaster horns
F&S luggage rack and engine guard
Kury Offset Hiway pegs
July 13, 2016, Riding on the DARKSIDE now, Classic Radial 165/80-15


Last edited by OlHossCanada; 07-31-2011 at 01:15 PM.
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post #8 of 37 (permalink) Old 07-31-2011, 03:27 PM
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Curious here, So what does the tach show when your going 105 MPH?
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post #9 of 37 (permalink) Old 07-31-2011, 03:43 PM
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Welcome to the Club..........

The journey begins:

The journey continues:

The journey ending:


2002 VN750 Vulcan
Rebuilt Engine
ACCTs lubed w/TOC Springs
Pick-up Coils Gapped at .018"
Splines Lubed
Deka MF AGM EXT15L Battery
NGK Iridium IX Spark Plugs
R/R Relocation Fix
New Rear Rack
Stock Seat Repadded
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post #10 of 37 (permalink) Old 07-31-2011, 04:01 PM
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Originally Posted by ifixf18s View Post
Curious here, So what does the tach show when your going 105 MPH?
for me, roughly 7K

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