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Old 09-25-2012, 12:35 AM   #47
hilslamer
2XRedheadedstepchild
 
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Joined: Jan 2007
Location: Chch, EnZed
Oddometer: 1,785
Quote:
Originally Posted by Yellow Pig View Post
I appreciate the tips Tim, but I have been riding it like this for 4/5 years without issues. The bike has been re-sprung and re-valved by SuperPlush for my riding weight and style.

I must have hit a rock (no major dings in the skid plate) or more likely a rise in the trail.

I don't plan on altering my riding habits and curbing my fun, I'll just have to pay to play.

I still think KTM could have done a better job on the skid-plate design by incorporating a smaller removable sub-frame that is not connected to the oil tank or the radiator. That is just silly.
If you have been airing out your SE or any other 400+lb bike for 4-5 years on any sort of a regular schedule, perhaps you should measure the spring rates again and consider a suspension oil change on ~30-40 hour intervals. That's at a minimum. The springs and suspension valving shims, despite having been SuperPlushed, are likely badly fatigued and freshening them all up will mean more than you might think if you have not already. Very few people credit springs with fatigue unless they fail entirely, which is a major oversight and especially in the case of an SE suspension spring or shim.

Keep an eye on the headstock of the frame for cracks, too; they fatigue just the same. Same goes for the upper shock mount and footpeg mounts. I have no idea how hard you are re-entering the atmosphere on your SE but it sounds like this may just be the first of a long string of fatigue-life issues that cannot possibly be construed as "design flaws" in my eyes.

Lastly, I don't think that you got my earlier comment: the oil tank IS the "subframe"(structural element). If you are bottoming the skid plate hard enough that you are encountering what you have already, think of what happened to the radiator as the "fuse" in the system and avoid the situation. You cannot possibly expect ANY skid plate to take the full brunt of the suspended weight of you and the bike from free-fall and not either fold up itself or transmit the loads to other members, be they radiators or not, without some sort of failure that absorbs the energy of the impact.



Quote:
Originally Posted by mookymoo View Post
The only sure solution is to relocate the oil tank & mount the bash plate to the frame/engine mounts.
It's been done - can't remember who now... ;)
So...what fails in that case with a similar impact?



Quote:
Originally Posted by Dustodust View Post
and while we are on the subject ; why is the top of the motor at the heads not mounted to the frame ? ( there are mount threads cut )
Because TOO much rigidity is a detriment, unless you want to feel each and every jolt that the wheels and suspension cannot soak up. Look at an SXF versus and XCF, and not the lack of the headstay(despite machining on the frame/cylinder heads for such) and the explanation is before you...some flex and "give" is part of the tuning of the motorcycle, part of the "suspension," so-to-speak...


Quote:
Originally Posted by Dustodust View Post
and why does no one make some rails with a plate between them that clamp on from the truss near the steering head that run under the motor like a cradle to form true engine protection ?

and why does the headlight reflect light not just forward but upward in front of the bike where it is not needed blinding you in fog or dust ?

and why is the sidestand mounted to the motor ?

and why is the frame so wide at the steering head that it makes it so difficult to maneuver in tight off road situations ?

why !

why !

why !
Why have so many people raced, rallied and ridden these bikes far faster and longer than most and yet not encountered failures as a result of any of these "flaws?" I can only suggest an answer: because they are more than likely conscious of them and work/ride around the "problems." ANY bike has weaknesses and vulnerabilities; you have to know them and ride around them to be a truly good rider. Expecting complete indestructability out of any motorcycle is simply not realistic; even a KLR650 can be hurt somehow. If you bottom the skidplate of any modern motocross bike hard enough, you can expect something to give - frame, engine mounts, etc. This is not a "flaw," it is the result of abuse beyond design margins.
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