Back In The Saddle Again - Yea!

supertireguy · May 28, 2007

Back in early March of this year after 265 engine hours and 7000 miles of big grins something finally went klunk in my motor. One of the exhaust valve springs broke. Just jamming along in the city and the engine went dead. Fortunately there were no bad grinding or nasty sounds when it happened, just party over.

Taking the engine apart we were relieved to find no other damage. No scary metal bits in the engine or things of that sort.

I could have just replaced the broken valve spring and gotten back on the road again but with the high mileage and engine hours it was wise to bite the bullet (aka doing the right thing) and replace a bunch of engine parts. Not to mention that the Berg service schedule calls for replacing these bits at 100 engine hours. 4 new valve springs, some minor head port/polish work, new piston, new piston barrel, new crank bearings and the updated 07 counter balancer. Basically it's a brand new motor. It took a little while to order the parts and get it all together but being patient with these things is important. We also had a small battle removing some stubborn crank bearing races but the bike just recently got put back together and it's finally on the road again.

Looking forward to another 300 engine hours and 7000 miles or more of fun before the next teardown. After riding my CBR1000RR around for 3 months in felt kind of strange getting back on the bike but it sure feels great to be back in the Berg saddle again.

Any other owners with high mileage/engine hour reports?

DaleEO · May 29, 2007

And yet another Husaberg success story!!!

Man, that's allot of hours!

How did the crank (big end), piston, cylinder, bearing etc... look feel spec out after all those hours??

I'm at 143 hours and almost 2900 miles now,so I'd be interested to know what was wearing on your bike.

supertireguy · May 29, 2007

The piston and piston barrel showed only minor visual signs of wear. There were some very small scratches on the piston skirt but nothing big. Running my fingers over the inside of the piston barrel and piston I could not feel any of the wear. The crank & connecting rod components seemed perfectly fine by our reckoning.

I was tempted to just reuse the old piston barrel and old piston with new rings but was talked out of it. If the motor is coming apart anyway why not reassemble it with new bits. I think the old piston barrel and piston (with new rings) might be reusable in some future situation.

All in all it's a good feeling to see that with regular oil/filter service the internal engine bits seem to have very good durability. If the bike only saw 100% hardcore race use then the internal bits would probably have much more wear and tear that would require service at the 100 engine hour mark as the service manual recommends. In my case the bike is used 80% street and 20% track so internal bits should last a while.

TCK! · May 30, 2007

Dude this is the same thing as me: http://www.husaberg.org/index.php?name= ... pic&t=6064

I wish I would have known you were rebuilding I would have loved to help/look over your shoulder. I was just about to replace the valves and springs. I'm at 108 hours. Would it be wise of me to tear into it more replacing the same stuff you did?

supertireguy · May 30, 2007

TCK! said:
Dude this is the same thing as me: http://www.husaberg.org/index.php?name= ... pic&t=6064

I wish I would have known you were rebuilding I would have loved to help/look over your shoulder. I was just about to replace the valves and springs. I'm at 108 hours. Would it be wise of me to tear into it more replacing the same stuff you did?

If you had over 200 hours on your motor I would say maybe replace a bunch of stuff, especially the counter-balancer with the 07 unit. With only 108 engine hours on the clock I would vote for just replacing the exhaust valve springs at this time. We've noticed handful of customer bikes that have had the same problem with one exhaust valve spring breaking. Not sure if it's a bad batch of springs from the factory or what. Fortunately when the spring breaks it does not bust into pieces and none of the broken valve springs have resulted in a bent valve as of yet. The motor just comes to a quiet stop and that's that.

While the top is off the motor do check your rocker arm roller bearings for smooth rolling operation. I noticed my rollers getting a little crunchy and a little extra bit of metal slivers on the drain plug with my motor at 100 hours.

TCK! · May 30, 2007

supertireguy said:
TCK! said:

Dude this is the same thing as me: http://www.husaberg.org/index.php?name= ... pic&t=6064

I wish I would have known you were rebuilding I would have loved to help/look over your shoulder. I was just about to replace the valves and springs. I'm at 108 hours. Would it be wise of me to tear into it more replacing the same stuff you did?

Click to expand...

While the top is off the motor do check your rocker arm roller bearings for smooth rolling operation. I noticed my rollers getting a little crunchy and a little extra bit of metal slivers on the drain plug with my motor at 100 hours.

Yeah I remembered reading that and that was one of the first things I checked out. They are rolling very smooth, so I was happy about that.

Not to be ignorant but what is the improvement on the '07 counter-balancer? Is just better balanced?

Back In The Saddle Again - Yea!

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