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Old 06-15-2010, 09:16 PM   #1
Jason_Canuck
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KTM = Kill The Motor

Got to work tonight on diagnosing what happened at GU this weekend. Started pulling bike apart this evening and it don't look good. Started with pulling the spark plug which was tight all the way out. The "L" on the plug was non-existant, pretty much bottom end of plug was destroyed. And looks like threads on head may be buggered up. Pulled exhaust and one valve is definitely destroyed. Good new is there doesn't appear to be any cracks in head at this point. More tomorrow as I get engine out of chasis.
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Old 06-15-2010, 09:28 PM   #2
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i dont even want to start to open mine up ... i just want to ship it off to get fixed and cry on the inside
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Old 06-16-2010, 07:17 AM   #3
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i dont even want to start to open mine up ... i just want to ship it off to get fixed and cry on the inside
Don't hold it in, let it out like I did. What adds insult to injury was that my wife suprised me on Sunday when I got home with an easy-up for track days as a father's day gift. She asked me last night if she needed to return it.
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Old 06-16-2010, 09:37 AM   #4
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LOL! that is so wrong
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Old 06-16-2010, 09:45 AM   #5
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man, i need to dig up the acronyms that I started making when the mini ktm pooped motor guts.

kill the mechanic was one of them.

hope you get the bike back together without missing too much.
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Old 06-16-2010, 09:57 AM   #6
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Hoping to sell the mini to fund the rebuild.
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Old 06-16-2010, 10:23 AM   #7
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Kaaatoooooooooooom!
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Old 06-16-2010, 10:39 AM   #8
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Them Hondas aint much better. At least mine didn't split cases like Celine's.
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Old 06-16-2010, 10:43 AM   #9
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oohhhhhhhhhhhhhhhhhhhhhhhhhhhh
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Old 06-23-2010, 10:09 AM   #10
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Mechanical things suffer failures. That's the nature of the beast. That said, between the two, KTMs tend to drop valves and Hondas tend to throw rods. Neither are great ways to die, but it's at least some consolation that KTMs won't oil the track very often.

Part for part, rotating and reciprocating parts in KTMs are over-engineered compared to the Japanese peers. Top ends can be fragile, as all high-revving single cylinder 4-strokes can be, but KTM bottom ends are tough as nails. I held a stock KTM 450 rod in my hand a couple days ago and compared that to a stock Honda CRF 450 rod, and there was no comparison - the KTM rod was a forged strong arm of the law while the Honda rod was a barely forged finger of a child.

On a related note, I just happen to have my bike's piston with me at work today so I could weigh it. (Pardon the iPhone pix, it's all I had at the spur of the moment.) It's a tasty morsel, made from forged goodness by the stellar folks at JE. The last of the rebuild parts will be here this week. I have been in no hurry to rebuild since I've had good folks like Greg and the AF1 guys willing to loan me various KTMs and Aprillias to race.

There's also some yummy Xceldyne Ti valves here, patiently waiting me to get off my duff and start building my motor.


911105535 54xBw L

911105513 pw8uK L

865772056 seWFB XL

900163056 9MY99 XL
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Old 06-23-2010, 10:16 AM   #11
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purdy
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Old 06-23-2010, 10:28 AM   #12
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pictures blocked at work. Gonna have to revisit thread tonight.
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Old 06-23-2010, 02:57 PM   #13
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Quote:
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iPhone pix
900163056 9MY99 XL
iphone?
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Old 06-23-2010, 03:03 PM   #14
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uh oh ... hes on his way for a come back ... guess i need to get off my myself
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Old 06-23-2010, 03:08 PM   #15
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KTM = Keep Three Mechanics
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He nailed the take-off, but when he landed, something terrible happened. His front tire exploded like a cannonball, and his handle bars went straight through his head. Blood was everywhere. His teeth were ground down to a powder, and the front of his face exploded out the back of his skull. He died instantly... the next day.
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Old 06-23-2010, 03:14 PM   #16
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gss = motard killer
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Old 06-23-2010, 08:01 PM   #17
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What compression you aiming for with that set up, Linz?

I've been debating on whether to "upgrade" my internals now, or wait until something lets go.
Would be nice to have a few extra ponies. That's for sure.
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Old 06-23-2010, 08:14 PM   #18
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no you need to slow down sir
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Old 06-23-2010, 08:50 PM   #19
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Mine is not as bad as I was thinking, so I'm gonna stay positive. Running a motard comes with the expense. When it is all said and done, I still like it.

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I may need a hug when it's all done though...
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Old 06-24-2010, 09:10 AM   #20
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Quote:
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iphone?
No. This was taken with next to no light using a Canon 1D Mk II with a Canon 24-70 L at 1/25, f/2.8 and ISO 100, handheld, which is why it's a little soft focus. Decent bokeh, though, eh?

Pistons were iPhone pix, though.


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What compression you aiming for with that set up, Linz?
Stock, which is 12.5 to 1.
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