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View Full Version : Seeing is believing.

xtremsavage
04-30-2008, 05:22 PM
This is some damage from my buddy's Cen GST 7.7 from a few weeks ago. I have no idea on how it happened but he called me a few min. after it happened and I couldn't believe it until I actually seen it. First off, a few days prior, he was runnin his truck and jumped the curb and hit the light pole in front of his house. Just touched third gear truck went flying and smack, shattered the gas tank in a million pieces. This damaged I didn't see. Then, he rigged up a savage tank so he could still at least go run later that night. Well, a few days later and his truck is down and out for awhile. The damage, I'll let the pics speak for themselves.

Before, this is the new one I bought
http://i196.photobucket.com/albums/aa66/xtremesavvy/104_0755.jpg
http://i196.photobucket.com/albums/aa66/xtremesavvy/104_0756.jpg
http://i196.photobucket.com/albums/aa66/xtremesavvy/104_0757.jpg

And after, or should I say before I bought a new one.
http://i196.photobucket.com/albums/aa66/xtremesavvy/104_0761.jpg
http://i196.photobucket.com/albums/aa66/xtremesavvy/104_0760.jpg
http://i196.photobucket.com/albums/aa66/xtremesavvy/104_0759.jpg
http://i196.photobucket.com/albums/aa66/xtremesavvy/104_0758.jpg
http://i196.photobucket.com/albums/aa66/xtremesavvy/104_0762.jpg

Has anybody seen this happen before or know why or how it could have happened. Any input on this would be great.
MotoPsycho
04-30-2008, 06:07 PM
the blue ring around the outside? It looks as though it got VERY hot somewhere along the line, hardened to the point of getting brittle, and shattered.

Either that, or it was improperly heat treated, both would have the same end result. A clean break in steel is directly related to hardness.

Just a guess.
MTBikerTim
04-30-2008, 07:59 PM
I'm going with what moto said. It does look like it got very hot. Is there signs of slipping clutch shoes on the inside.
SavageXF4.1
05-01-2008, 07:37 AM
WOW! thats crazy!!!
xtremsavage
05-01-2008, 06:29 PM
the blue ring around the outside? It looks as though it got VERY hot somewhere along the line, hardened to the point of getting brittle, and shattered.

Either that, or it was improperly heat treated, both would have the same end result. A clean break in steel is directly related to hardness.

Just a guess.

That's what I was guessin too, well, after I seen what it looked like when it was off the motor. I know I remember always tellin him he needs to bring the idle down a bit cuz it's too high. That could be the prob. Or, it's from when he switched over to the Nova shoes. He might have to run a stiffer clutch spring. He's usin a 1.1mm spring now (which is stock). He might need to goto a 1.2mm or a 1.3mm spring, if they make them, I'll have to look into it.

I'm going with what moto said. It does look like it got very hot. Is there signs of slipping clutch shoes on the inside.

I'm not sure, I really didn't check for that. I'll have to look tom. when I get home from work. How can you tell, what does it look like? I've never had to check this before.
AoD
05-01-2008, 07:31 PM
We do a good bit in heat treating where I work. If you lightly bake an iron based metal, such as steel, it actually can be softened. It'll bend easier, but will actually be stronger against breakage. Now, there's a method called flash heating. That's what that looks like. Most steels we do end up turning blue (bluing). When you do this, the metal is super hardened but only at a high cost. The metal will become very brittle, and have a high likeliness of cracking.

I'd say that clutch bell was overheated, badly. I could be wrong, but with my experience in Iron and Steel, that's what I'd say! :)

Also, another good tip. Always make sure your clutch is free at an idle. If it's even lightly slipping onto the bell, it'll be continuously heating up. That's just another thing you could look into. :)
bwl2828
05-05-2008, 08:28 AM
wow dont know how much more u could do!!