Kx450f motor destroyed

kb228
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kb228 10/25/2018 1:46pm
10/25/2018 1:46pm
kb228 wrote:
The wall is screwed. The pic he posted shows a big ol gouge
newmann wrote:
X-Ray vision? I see a small nic or gouge at the rear lower area where the rod would have hit and a chunk broke off the...
X-Ray vision? I see a small nic or gouge at the rear lower area where the rod would have hit and a chunk broke off the front lower. I see no side shot of the bore. I also see only one pic of the underside of the piston.

Yes
Jbarros23
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Jbarros23 10/25/2018 6:06pm
10/25/2018 6:06pm
newmann wrote:
Three pages of photos, schematics and explanations later and there still isn't a bolt anywhere near that area. Ha, pure comedy.Laughing

Jbarros23 wrote:
[img]https://p.vitalmx.com/photos/forums/2018/10/25/298325/s1200_Screenshot_20181025_060949_eBay.jpg[/img] Here's the bolt

Here's the bolt
newmann wrote:
Oh, I know where the bolt is. Just having a hard time wondering why 70% of the others can't see it. I would like to see...
Oh, I know where the bolt is. Just having a hard time wondering why 70% of the others can't see it. I would like to see some more pics of the piston, the inside of the cylinder and the underside of the head. When you pulled the piston out, was the pin and upper part of the rod still in the piston or out loose in the engine?

You and the engine builder still on speaking terms? Has he offered any input or has he still not seen the damage?
I dont photos of the piston or head. I ended up selling the bike as is. Just decided to move on. Motor builder showed zero interest in looking at it to see what happened. Never offered to look at it when it first happened.
Jbarros23
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Jbarros23 10/25/2018 6:21pm
10/25/2018 6:21pm
newmann wrote:
Three pages of photos, schematics and explanations later and there still isn't a bolt anywhere near that area. Ha, pure comedy.Laughing

Jbarros23 wrote:
[img]https://p.vitalmx.com/photos/forums/2018/10/25/298325/s1200_Screenshot_20181025_060949_eBay.jpg[/img] Here's the bolt

Here's the bolt
newmann wrote:
Oh, I know where the bolt is. Just having a hard time wondering why 70% of the others can't see it. I would like to see...
Oh, I know where the bolt is. Just having a hard time wondering why 70% of the others can't see it. I would like to see some more pics of the piston, the inside of the cylinder and the underside of the head. When you pulled the piston out, was the pin and upper part of the rod still in the piston or out loose in the engine?

You and the engine builder still on speaking terms? Has he offered any input or has he still not seen the damage?



Jbarros23
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Jbarros23 10/25/2018 6:21pm
10/25/2018 6:21pm
Jbarros23 wrote:
[img]https://p.vitalmx.com/photos/forums/2018/10/25/298325/s1200_Screenshot_20181025_060949_eBay.jpg[/img] Here's the bolt

Here's the bolt
newmann wrote:
Oh, I know where the bolt is. Just having a hard time wondering why 70% of the others can't see it. I would like to see...
Oh, I know where the bolt is. Just having a hard time wondering why 70% of the others can't see it. I would like to see some more pics of the piston, the inside of the cylinder and the underside of the head. When you pulled the piston out, was the pin and upper part of the rod still in the piston or out loose in the engine?

You and the engine builder still on speaking terms? Has he offered any input or has he still not seen the damage?
Jbarros23 wrote:
[img]https://p.vitalmx.com/photos/forums/2018/10/25/298391/s1200_Screenshot_20181025_180820_Messages.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2018/10/25/298392/s1200_Screenshot_20181025_180914_Messages.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2018/10/25/298393/s1200_Screenshot_20181025_180954_Messages.jpg[/img]



This was our conversation

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project racer 10/25/2018 9:02pm
10/25/2018 9:02pm
Bummer deal with this bike. Wouldn't expect the guy to give up a new engine for free, but maybe offer at least a look at it.
kb228
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kb228 10/25/2018 9:10pm
10/25/2018 9:10pm
newmann wrote:
Oh, I know where the bolt is. Just having a hard time wondering why 70% of the others can't see it. I would like to see...
Oh, I know where the bolt is. Just having a hard time wondering why 70% of the others can't see it. I would like to see some more pics of the piston, the inside of the cylinder and the underside of the head. When you pulled the piston out, was the pin and upper part of the rod still in the piston or out loose in the engine?

You and the engine builder still on speaking terms? Has he offered any input or has he still not seen the damage?
Jbarros23 wrote:
[img]https://p.vitalmx.com/photos/forums/2018/10/25/298391/s1200_Screenshot_20181025_180820_Messages.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2018/10/25/298392/s1200_Screenshot_20181025_180914_Messages.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2018/10/25/298393/s1200_Screenshot_20181025_180954_Messages.jpg[/img]



Jbarros23 wrote:
This was our conversation
Well kawasaki isnt going to warranty a 25 hour bike with a motor that wasnt maintained by a kawasaki tech. Dude sounds stupid. “I checked the crank and it was good but the crank could have caused it”. Shut the hell up. Ive never been a professional mechanic and i know better than to say dumb shit like that. Ill bet you anything that circlip for the wrist pin is in the bottom end or still on that morons desk.

At the end of the day man we can sit here and try to guess what happened but none of us are going to know without the parts in hand.

I feel bad that this happened to you. Kawis are solid bikes. Yea the OEM cast pistons aren’t the greatest but are any cast pistons? They dont go in 25 hours thats for sure. Tons of people get a lot more out of them.

3
Jbarros23
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Jbarros23 10/25/2018 9:50pm
10/25/2018 9:50pm
I have a feeling the clip is in the bottom of the motor. I should of looked for it
sandman768
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sandman768 10/26/2018 4:56am
10/26/2018 4:56am
Get new bike & new mechanic..... Guy sounds like a douche....bud....brother.....
Jbarros23
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Jbarros23 10/26/2018 5:33am
10/26/2018 5:33am
sandman768 wrote:
Get new bike & new mechanic..... Guy sounds like a douche....bud....brother.....
I picked up a new 19 KX450. Sold this bike as is
3
newmann
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newmann 10/26/2018 6:18am
10/26/2018 6:18am Edited Date/Time 10/26/2018 6:19am
sandman768 wrote:
Get new bike & new mechanic..... Guy sounds like a douche....bud....brother.....
The bud and brother sound goofy, but I guess I fail to see where he refused to tear down your bike? Looks like you mentioned tear down and shortly afterwards posted up pics. Looks like you made mention of a bolt being in the bottom end which was quickly disproved. Still not seeing where the mechanic did anything wrong at this point.

Hate to see your engine shit the bed like that, but things happen. If you were okay with dumping the bike and moving on, who are we to argue that. Someone got a good aluminum frame project out of the deal!Smile


Good luck with the new one!
1
Tracktor
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Tracktor 10/26/2018 11:57am
10/26/2018 11:57am
DynoDan22 wrote:
There is enough room for the wristpin to migrate to one side and lose engagement with the other pin boss. look at the inside of the...
There is enough room for the wristpin to migrate to one side and lose engagement with the other pin boss. look at the inside of the remaining pin boss and you can see the scuff marks where the edge of the wristpin was rubbing the inside of the boss.
Yeah, I've been doing to many two strokes lately & didn't go back and look at pics. I have a feeling you may be right. I forgot the design of this type of piston......

I am ultra paranoid about circlips. JE Piston install directions are to seat the circlip with blow from wrist pin from opposite side...............
Brian_Finn
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Brian_Finn 11/2/2018 11:39am
11/2/2018 11:39am
Jbarros23 wrote:
What advise would you guys have for me? Think there is anything I can do??
This will sound smart a$$ but there's really nothing you can do other than find a motor and start over. The engine builder will not cover this after 25 hours and I'd be leary of him touching more of my motors based on what you've said his response is. May be cheaper to get another bike than a motor. Lots of new 17 and 18 KX's out there.
Bruce372
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Bruce372 11/2/2018 12:04pm
11/2/2018 12:04pm
There is a big difference between a trained professional and someone that does certain tasks for their profession....
1
kb228
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kb228 11/2/2018 12:16pm
11/2/2018 12:16pm
DynoDan22 wrote:
There is enough room for the wristpin to migrate to one side and lose engagement with the other pin boss. look at the inside of the...
There is enough room for the wristpin to migrate to one side and lose engagement with the other pin boss. look at the inside of the remaining pin boss and you can see the scuff marks where the edge of the wristpin was rubbing the inside of the boss.
Tracktor wrote:
Yeah, I've been doing to many two strokes lately & didn't go back and look at pics. I have a feeling you may be right. I...
Yeah, I've been doing to many two strokes lately & didn't go back and look at pics. I have a feeling you may be right. I forgot the design of this type of piston......

I am ultra paranoid about circlips. JE Piston install directions are to seat the circlip with blow from wrist pin from opposite side...............
CP has an install tool that makes it easy to not mess them up
Jbarros23
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Jbarros23 11/2/2018 12:40pm
11/2/2018 12:40pm
Jbarros23 wrote:
What advise would you guys have for me? Think there is anything I can do??
Brian_Finn wrote:
This will sound smart a$$ but there's really nothing you can do other than find a motor and start over. The engine builder will not cover...
This will sound smart a$$ but there's really nothing you can do other than find a motor and start over. The engine builder will not cover this after 25 hours and I'd be leary of him touching more of my motors based on what you've said his response is. May be cheaper to get another bike than a motor. Lots of new 17 and 18 KX's out there.
The topend was done with a half hour on it. I ended up selling bike as is. Bought a 19kx450
mattyhamz2 11/2/2018 12:48pm
11/2/2018 12:48pm
Jbarros23 wrote:
What advise would you guys have for me? Think there is anything I can do??
Brian_Finn wrote:
This will sound smart a$$ but there's really nothing you can do other than find a motor and start over. The engine builder will not cover...
This will sound smart a$$ but there's really nothing you can do other than find a motor and start over. The engine builder will not cover this after 25 hours and I'd be leary of him touching more of my motors based on what you've said his response is. May be cheaper to get another bike than a motor. Lots of new 17 and 18 KX's out there.
Jbarros23 wrote:
The topend was done with a half hour on it. I ended up selling bike as is. Bought a 19kx450
Bummer about the old bike, but congrats on the 19! Hope you guys can find a better mechanic that is more thorough and more willing to help look at everything if there is ever an issue. If I had done that top end for you, I would have told you to bring it to me immediately.
2
m1ke20012
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m1ke20012 11/13/2018 3:56pm
11/13/2018 3:56pm
captmoto wrote:
Here is a prime example of why I do all my own work. I refuse to pay someone to fuck something up that I can fuck...
Here is a prime example of why I do all my own work. I refuse to pay someone to fuck something up that I can fuck up for nothing. Being out of parts is bad but being out of labor makes it really suck. I've never had a catastrophic failure like that before. Good luck OP.
Jbarros23 wrote:
I was going to do it myself. But I figured I'd rather have a guy that does this for a living do it. Last thing I...
I was going to do it myself. But I figured I'd rather have a guy that does this for a living do it. Last thing I wanted to happen is a motor to seize in the air during a moto. Which it did anyways. Lesson learned.
That doesn't mean you shouldn't trust any mechanic. Just do research on them and get other opinions. Also putting him on blast might get him to do something about it, thrashing him might make him co-operate since word of mouth gets around and might make him lose business.

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