Husaberg main bearing rumour!

missfire said:

Hi PowerFiend!
I cane ask them as to watt bearings they use, I don’t think they are in the business of selling bearings I’m afraid they design and make systems for the deafens industry.
I now that they relocated the bearings in order to balance the left and rite side of the crank, apparently the crank is not supported equally in both sides and this is watt forces the bearings to grind there lip on the rollers, it is not a mater of alignment?

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The only thing that makes sense to me would possibly be that they moved the left bearing inboard to locate it where the counterbalancer was located (or added a second one in this location). This would better control any flexing taking place in the crank, but would require extensive case mods to properly support the bearing as good as or better than original. It could be possible that they made a bearing support mounted to the inside of the case that housed a bearing, this in addition to the stock bearing placement would definately more rigedly fix the crank.

Hmmm.

Parsko said:

Say,

Is it possible that DCR is doing this and warranty-ing the cost back to berg? I would see this a a feasible thing to do, since, if by blowing a bearing, it may affect/damage other stuff in the process. I am in doubt of my suggestion, but... If I were Husaberg, and I knew a dealer was selling bikes specifically for Motard racing, where this issue seems to be prevalent, then I might just give them the "green light" to make said upgrades (partially for names sake, I would want my brand to succeed!) to these specific bikes BEFORE they go out the door!

-Parsko

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If this were the case wouldn't it be more economical for the factory to make the change on the assembly line.

Hi Missfire,
I do indeed share such sentiment. If you perform a search via this site you shall find that I have often stated the very same in particularly regarding said balance assembly. (ie It is neither mystery nor news)

Please view my gallery for pictures: http://www.husaberg.org/modules.php?set ... _album.php

My comments regarding the chassis were simply in addendum to what I perceived to be redundant engine information which is well documented and readily available via this site.

Hope this helps.


Sincerely,
Dale

Sore subject here I see. Finding a different bearing such as Norton did would surely help the few with case misalignment since balls don't carry similar loads. Too bad such doesn't exist for an easy update for normal use. But my 03 with roller bearings has yet to fail and many others have not seen bearing failures as well, so case alignment must not run too rampant. With this in mind maybe all this is a mute point for us rec riders.
Looks like Motard racers are the exception and Dale has it figured out by pressing a spacer on the crank where the balancer once rested. Said spacer would help stiffen it in the unsupported area between the left bearing and crank and also the oscillating load would be eliminated from this area as well. The crank is then rebalanced and the saga comes to an end. Sounds like this is what the English fellows did. Heck, maybe they read Dale's posts.
On a brighter note, thanks for the tip on the read Taffy. Will see if Barnes and Noble has access to it. I hope it isn't by those blokes that go by Walker or Falloon as they have enough of my money.
Dan

Meant to add that since there really isn't too much side loads on the crank, could it not be that some engines are getting rebuilt with insufficient side clearance thusly placing a severe side load on the ball bearings popping the outer race edge? Then the culprit finds it easy to blame the Berg design?
Dan

Main bearings

Has anyone broken there left side bearing race? If so what was your thoughts?

Ball or roller isn't the issue. Guess I shouldn't have stated only the ball design. What I'm truly curious about is where are all of these side loads coming from in a properly set up crank since all the primary gears are straight cut? Thats why I mentioned the possibility of improper setup. I just can't believe the crank end is flexing in an orbital motion like the foot long crank in a Norton did with no center main (which did break their races in a similar manner). No, I don't want Husaberg to end up like Norton and possibly now VOR.
dan

If the whole post is read, one would notice, and please don't take this the wrong way, that Dale explained why this is happening in the Motards.

It seems, that due to the higher grip the bike is feeling, that the frame is flexing more than would normally be seen by us off-roaders. When this occurs, the engine readily becomes a structural component of the frame (it still is in our off-road bikes!). Thusly, the engine is flexing. It would be reasonable to say that a certain amount of flex is going to be okay through the engine. But, again, since the motards have so much grip, the forces twist the frame, the engine, and hence, the crank even more than they may be designed to recieve.

My guess would be that the Motard guys who reinforce their frame(and I have read posts here that say some do), might not have this issue nearly as much.

Dale also pointed out that these roller bearings also have a small (0.0004") amount of radius (I am guessing he means runnoff) machined into them. This is only 10 microns. From working in my industry, of which 10 microns is HUGE, it is easy to see something move that much, even under the pressure of human power.

A simple example of a side load: get a shoebox, put a rod through it, and twist the box. The rod will become askew.
Another example: picture your crank mounted in the roller bearing. If you tried to spin the crank, while simulteneously applying a moment (torque) to the crank (against the normal axis of rotation), the bearing will push out on top (apply a side load on top in one direction) and pull in on bottom (apply a side load on the bottom in the opposite direction).
If you equate this to the engine, you will see where the side load being applied to the roller. It is only a matter of time before this will cause failure.

Hope this helps...

-parsko

Thank you for the explanation. Curious minds tend to want to know. Had thought about the crank spreading at the big end pin under a heavy load, but the frame flex thing was not something I connected to this issue. Thought the stiffer frames were for handling reasons. Is KTM having similar issues with their flexy frames they use?
Dan

Parsko said:

From working in my industry, of which 10 microns is HUGE, it is easy to see something move that much, even under the pressure of human power.-parsko

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And what industry is that?... Particle physics!

oldberger :roll:

Main bearing

So after a 30 min. ride through the woods and stopping to talk to a friend for about 10 min. went to start the 05 FC 450 but would not turn over the kick start would not move not much frame strase with the motor off. When pulling the motor apart I found the bearing race had broken with all the pices just laying there where they broke off from. Showing it to
a few people that work in the machain and bearing field to there findings a bad temper job.

This was the same problem KT******M had two years ago with their cam bearings. My freind who helped me find the problem with the clutch rod had it happen to him on a 12 hour old 525. Cause according to KT******M
" bad temper on a blatch of bearings".

Cody,

Do you still have the bearing pieces that broke, and the part that they broke off of (the inner race)?

There is a member of this board that can check the mechanical properties to determine if they were defective.

Joe

dsducati, yes, the stiffer frame is also for handling reasons. Or should I say, primarily for handling reasons. I understand the physics behind automotive suspension, but not very much about bikes. But, think about when you go around a corner hard. That rear tire is flexing the rear swingarm. This results in the tire not rotating about the axis of Z (Z being the ground to the sky when the bike is going straight) and hence the tire "turning", like the front is capable of. This may result in undesireable conditions. This is another reason why we here about, for instance, "the new '05 bike sports a stiffer rear swingarm", it reduces twist.

Dale, you might be able to vouch for this. Am I explaining it correctly?

Industry; semiconductors, where the nanometer is the norm...

-Parsko

Main Bearings

Yea I do still have the race and it's bits. Where shall I send them?

Re: Main Bearings

Cody said:

Yea I do still have the race and it's bits. Where shall I send them?

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Hi Cody,
If you like you may forward said bearing to:

Dale Lineaweaver
951 St. Andrews Drive
El Sobrante, Ca.
94803.

I will inspect said bearing and forward to XXXX should he be willing.

Kind Regards,
Dale

Hey Missfire,
Just a little hint mate, use the SpellCheck button before submitting your reply. I spose this is a bit like telling someone they've got bad breath or BO, but someones gotta do it. You've had me grinning everytime I've tried to understand wot u bein sain. My brother is just as bad or worse. Dad always said - "So much for bloody college education". :lol: :lol:

Just thought i'd make this string even longer

Mark